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Capturability distinction analysis of continuous and pulsed guidance laws 认领 引用
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作者 Yuting LU Qinglei HU +2 位作者 Yang YU Tuo HAN Jianying ZHENG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期472-484,共13页
The capture zones of the continuous and pulsed guidance laws in the pursuit-evasion game are analytically discussed in this paper to provide deep insights into the capturability distinction between the continuous guid... The capture zones of the continuous and pulsed guidance laws in the pursuit-evasion game are analytically discussed in this paper to provide deep insights into the capturability distinction between the continuous guidance law and the pulsed guidance law.Specifically,first,in the pursuit-evasion game,various capture cases are defined regarding the Zero-Effort Miss distance(ZEM)to facilitate the capturability analysis.Then,for both the evader and the pursuer,the Linear-Quadratic Differential Game(LQDG)guidance laws concerning the continuous acceleration and the pulsed acceleration are converted into a unified form.In each capture case,the optimal solution existence conditions are derived,and the corresponding capture zones are formulated.The discussion on the capture zones shows that if the optimal solution exists,the distinction between the pulsed guidance law and the continuous guidance law can be neglected under small guidance effort weight.However,the capture zone of the continuous guidance law is larger than that of the pulsed guidance law with large pursuer guidance effort weight,but smaller with large evader guidance effort weight.Finally,various simulations are conducted to illustrate the distinction of the continuous and pulsed guidance laws,as well as the impact of the acceleration ratio and the time constant ratio on the capturability. 展开更多
关键词 Differential game theory Linear-quadratic differential game Pulsed guidance law Capturability Capture zone
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Capturability of 3D RTPN guidance law against true-arbitrarily maneuvering target with maneuverability limitation 认领 引用 被引量：13
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作者 Kebo LI Zhihui BAI +2 位作者 Hyo-Sang SHIN Antonios TSOURDOS Min-Jea TAHK 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2022年第7期75-90,共16页
The capturability of the Three-Dimensional(3D)Realistic True Proportional Navigation(RTPN)guidance law is thoroughly analyzed.The true-arbitrarily maneuvering target is considered,which maneuvers along an arbitrary di... The capturability of the Three-Dimensional(3D)Realistic True Proportional Navigation(RTPN)guidance law is thoroughly analyzed.The true-arbitrarily maneuvering target is considered,which maneuvers along an arbitrary direction in 3D space with an arbitrary but upperbounded acceleration.The whole nonlinear relative kinematics between the interceptor and target is taken into account.First,the upper-bound of commanded acceleration of 3D RTPN is deduced,using a novel Lyapunov-like approach.Second,the reasonable selection range of navigation gain of3D RTPN is analyzed,when the maneuver limitation of interceptor is considered.After that,a more realistic definition of capture is adopted,i.e.,the relative range is smaller than an acceptable miss-distance while the approaching speed is larger than a required impact speed.Unlike previous researches which present Two-Dimensional(2D)capture regions,the inequality analysis technique is utilized to obtain the 3D capture region,where the three coordinates are the closing speed,transversal relative speed,and relative range.The obtained capture region could be taken as a sufficient-but-unnecessary condition of capture.The new theoretical findings are all given in explicit expressions and are more general than previous results. 展开更多
关键词 Capture region Lyapunov-like approach Maneuverability Limitation Realistic true proportional navigation True-arbitrarily maneuvering target
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The path to carbon neutral shipping:A comparative analysis of low carbon technologies 认领 引用 被引量：1
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作者 Zhengang Zhou Zhicheng Wu +8 位作者 Chang Liu Lingyu Shao You Zhang Weijie Liu Haitao Shen Dongwei Yao Haidong Fan Chenghang Zheng Xiang Gao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第1期606-616,共11页
Ship operations are crucial to global trade,and their decarbonization is essential to mitigate climate change.This study evaluates the economic viability of existing and emerging decarbonization technologies in mariti... Ship operations are crucial to global trade,and their decarbonization is essential to mitigate climate change.This study evaluates the economic viability of existing and emerging decarbonization technologies in maritime shipping using the levelized cost of energy methodology.It includes a detailed comparative analysis based on essential criteria and sensitivity assessments to highlight the economic impacts of technological advancements.Key factors influencing total costs include fuel costs,carbon pricing,and energy demands for carbon capture.The findings reveal that methanol is more cost-effective than heavy fuel oil(HFO)when priced below 3000 CNY,assuming HFO costs 4400 CNY.Additionally,methanol with post-combustion carbon capture is less expensive than pre-combustion carbon capture.When carbon prices rise above 480 CNY,carbon capture technologies prove more economical than purchasing carbon emission allowances for HFO and liquefied natural gas.Enhanc-ing the use of exhaust gas waste heat is recommended for cost savings.Post-combustion carbon capture also shows greater efficiency,requiring about 1.1 GJ less energy than pre-combustion methods,leading to lower overall costs.Future research should focus on market mechanisms to stabilize fuel prices and develop less energy-intensive carbon capture technologies.This study offers critical insights into effective decarbonization strategies for advancing global maritime trade in the present and future. 展开更多
关键词 Ship Low carbon Assessment Alternative fuel Carbon capture
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Genetic insights into drainage evolution:Late Miocene river capture in the eastern Himalaya 认领 引用 被引量：1
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作者 Xiaoyun Sui Pengcheng Lin +3 位作者 Liuyong Ding Huanshan Wang Jonathan Waters Dekui He 《Journal of Systematics and Evolution》 SCIE CSCD 2026年第1期33-48,共16页
The unique geomorphology of rivers in the eastern Himalaya has long intrigued geologists,yet their drainage history remains debated.Drainage reorganization can have a significant impact on genetic differentiation in f... The unique geomorphology of rivers in the eastern Himalaya has long intrigued geologists,yet their drainage history remains debated.Drainage reorganization can have a significant impact on genetic differentiation in freshwater taxa.This study employs the cold-adapted fish genus Schizothorax as a biogeographic proxy to reconstruct the evolutionary history of the Yarlung Tsangpo-Brahmaputra River(YTB),with a focus on a prominent hanging valley tributary-trunk stream system.Phylogeographic analyses of mitochondrial cyt b gene sequences identified a monophyletic QTP-YGP clade comprising species from the Qinghai-Tibet Plateau(QTP)and the Yunnan-Guizhou Plateau(YGP).Within the QTP-YGP lineage,YTB species represent the earliest diverging clade.In contrast,species from the Indus and Ganges basins are more closely related to congeners from the southeastern QTP and YGP.The YTB assemblage is further subdivided into two distinct clades.Molecular dating suggests that the YTB lineage diverged from the broader QTP-YGP group during the early Late Miocene,with the two YTB clades separating in the Late Miocene.We propose that a paleo-Yarlung Tsangpo-Dingba(Dibang)-Brahmaputra river and a Yigong-Parlung-Zayul(Lohit)river were established prior to the Late Miocene and were subsequently captured by the lower Yarlung Tsangpo River—via the Siang and Zhaqu,respectively—during the late Miocene and Quaternary.The modern YTB drainage configuration was established by the late Early Pleistocene.This study underscores the importance of integrating genetic,fauna and geomorphological data to understand the complex evolution of drainages in the eastern Himalayas. 展开更多
关键词 cladogenetic event paleo-drainage evolution river capture the eastern Himalayan syntaxis Yarlung Tsangpo
Novel Ketone-Based IPDA Phase Change Absorbents for Highly Efficient Wide-Concentration-Range CO2 Capture and Low-Energy Regeneration 认领 引用 被引量：1
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作者 Qingrui Zeng Ziang Jia +3 位作者 Yingyang Song Yiwen Fan Xu Liu Jinping Cheng 《Engineering》 SCIE EI CSCD 2026年第3期221-236,共16页
Carbon dioxide capture and storage (ccs) is an important technological path for realizing "carbon neutrality," where carbon capture is one of the three key CcS technologies. At present, mature carbon capture... Carbon dioxide capture and storage (ccs) is an important technological path for realizing "carbon neutrality," where carbon capture is one of the three key CcS technologies. At present, mature carbon capture technologies still have technical shortcomings and difficulties, such as low capture efficiency and high energy consumption, which limit their large-scale popularization and application. In this study, a solid liquid phase change absorbent (PCA) system with isophorone diamine (IPDA) as the only carbon dioxide (CO2) capture carrier and ketone-based organic molecules as the phase change medium was developed.The solid-liquid PCA system has a wide range of applicability,with highly efficient CO2 capture (1.11 mol·mol-1) at concentrations ranging from typical values in air to those in coal-fired industrial emissions (400 to 150000 ppm) and low-energy consumption regeneration, as revealed by a two-phase integrated engineering model. The CO2 absorption product IPDA(NHCOO-)2 was characterized by materials science analysis, molecular dynamics (MD) calculations, and quantum chemistry. The results indicate that in noncyclic ketone-based phase-change media, the hydrogen bonding in IPDA(NHCOO-)2 is modulated by noncovalent bond interaction (NCI) forces to form a small-scale hydrogen-bonding network. These properties ensure that the product can be easily regenerated by low-temperature thermal treatment (333 K,60℃), and characterization and calculations revealed a reaction mechanism different from that of the aqueous system. The technoeconomic evaluation (TEA) results show that this type of ketone-based PCA has an obvious low-cost advantage over traditional carbon capture technologies. This study provides a new perspective on the application and practical feasibility of PCAs for direct air capture of carbon dioxide. 展开更多
关键词 CO2capture Phase change absorbents IPDA Molecular dynamics Noncovalent interactions
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Adaptive-length data-driven predictive control for post-operation of space robot non-cooperative target capture with disturbances 认领 引用 被引量：1
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作者 Peiji WANG Bicheng CAI +2 位作者 Chengfei YUE Yong ZHAO Weiren WU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第2期485-498,共14页
This paper solves the problem of model-free dual-arm space robot maneuvering after non-cooperative target capture under high control quality requirements.The explicit system model is unavailable,and the maneuvering mi... This paper solves the problem of model-free dual-arm space robot maneuvering after non-cooperative target capture under high control quality requirements.The explicit system model is unavailable,and the maneuvering mission is disturbed by the measurement noise and the target adversarial behavior.To address these problems,a model-free Combined Adaptive-length Datadriven Predictive Controller(CADPC)is proposed.It consists of a separated subsystem identification method and a combined predictive control strategy.The subsystem identification method is composed of an adaptive data length,thereby reducing sensitivity to undetermined measurement noises and disturbances.Based on the subsystem identification,the combined predictive controller is established,reducing calculating resource.The stability of the CADPC is rigorously proven using the Input-to-State Stable(ISS)theorem and the small-gain theorem.Simulations demonstrate that CADPC effectively handles the model-free space robot post operation in the presence of significant disturbances,state measurement noise,and control input errors.It achieves improved steady-state accuracy,reduced steady-state control consumption,and minimized control input chattering. 展开更多
关键词 Combined control Data-driven predictive control Post operation Predictive control systems Space non-cooperative target capture
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Reactive CO2 capture electrolysis at low voltage and high single-pass conversion enabled by ultra-low loading molecular catalyst 认领 引用
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作者 Yuming Wu Guohao Li +7 位作者 Mengxin Liu David Inglis Yasuhiro Sakamoto Lizhuo Wang Zhiqiang Zhao Catherine Stampfl Feng Jiao Yijiao Jiang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期728-737,I0018,共10页
Integrating electrochemical CO2 conversion with carbon capture extends the CO2 source beyond pure or point-source streams.By directly interfacing with capture units,reactive CO2 capture electrolysis circumven... Integrating electrochemical CO2 conversion with carbon capture extends the CO2 source beyond pure or point-source streams.By directly interfacing with capture units,reactive CO2 capture electrolysis circumvents the energy-intensive regeneration and compression processes to supply pure CO2 stream,also minimizes the amount of unreacted CO2 through gas-fed CO2 electrolysis.However,the conversion pathway is hampered by high electrolyser voltages and reliance on precious and thick metal catalysts(>2.0 mg cm-2).Here,we report an energy-efficient reactive CO2 capture electrolysis system enabled by an ultra-low loading molecular catalyst(cobalt phthalocyanine anchored onto multi-walled carbon nanotubes,Co Pc/CNT).When the Co Pc/CNT exceeds 0.2 mg cm-2loading on cathode,the thicker Co Pc/CNT layer largely increase electrical and mass transfer resistances.This limits the availability of local CO2 at the catalyst surface,suppressing the formation of adsorbed intermediates(COOH*/CO*)on cobalt centres,as observed by operando Raman spectroscopy.Benefiting from the features,the electrolysis system achieves a single-pass CO2 conversion of 55.1%at 300 m A cm-2 and a faradaic efficiency of CO(FECO)84.7%at a 0.2 mg cm-2.At 100 m A cm-2,the synergistic combination of Co Pc/CNT with a two-layer membrane architecture reduces electrolyser voltage by 30%to widely used bipolar membrane(BPM)-incorporated electrolyser and 17%voltage to metal catalyst-based cathode.This study offers a costeffective molecular catalyst for reactive CO2 capture electrolysis and paves the way for energy-efficient carbon capture and utilisation integrated systems. 展开更多
关键词 Reactive CO2capture Bicarbonate electrolysis CO2capture and utilization Cobalt phthalocyanine Low catalyst loading High conversion yield
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Catalysts and modification strategies for CO2 capture and in-situ electroreduction 认领 引用
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作者 Qingman Niu Mingzhu Yue +5 位作者 Bingkun Li Lu Liu Wenfu Xie Min Li Tianyu Zhang Qiang Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期287-318,共32页
As atmospheric CO2 concentration continues to rise,carbon capture and utilization(CCU)technology has emerged as a critical strategy toward achieving carbon neutrality.CCU offers a dual advantage of mitigating CO_(2... As atmospheric CO2 concentration continues to rise,carbon capture and utilization(CCU)technology has emerged as a critical strategy toward achieving carbon neutrality.CCU offers a dual advantage of mitigating CO2 emissions while producing value-added chemicals and fuels.However,conventional CCU strategies typically decouple the CO2 capture and electrochemical conversion processes,resulting in increased system complexity,higher energy demands,and limited economic viability.Building an integrated system of CO2 capture and in-situ electroreduction can bridge the technological gap,reduce costs,and ultimately enhance carbon cycle efficiency.In this review,we highlight recent advances in CO2 capture and in-situ electroreduction technologies.We first evaluate the strengths and limitations of conventional CCU technologies and the emerging CO2 capture and direct utilization technologies.Subsequently,we summarize the breakthroughs in multifunctional catalyst systems and key catalyst optimization strategies,and analyze the mechanisms behind the performance improvement.Meanwhile,we also discuss the application progress of in-situ techniques and theoretical calculations in CO2 capture and in-situ electroreduction.Finally,we outline the unresolved scientific and engineering challenges and propose future research directions to accelerate the development of CO2 capture and in-situ electroreduction. 展开更多
关键词 CO2capture In-situ electroreduction Carbon capture and utilization Electrocatalysts Optimization strategies Catalytic mechanism
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The Carbonation Trap:Time Delays and Performance Uncertainty in Cement Climate Accounting 认领 引用
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作者 Haoxuan Yu Jilong Pan +2 位作者 Izni Zahidi Chow Ming Fai Dongfang Liang 《Engineering》 SCIE EI CSCD 2026年第4期32-41,共10页
Cement production accounts for 5%-8%of global CO2emissions,prompting industry interest in carbonation—the natural reabsorption of atmospheric CO2by concrete—as a climate mitigation strategy.Recent studies sugg... Cement production accounts for 5%-8%of global CO2emissions,prompting industry interest in carbonation—the natural reabsorption of atmospheric CO2by concrete—as a climate mitigation strategy.Recent studies suggest carbonation could offset approximately 50%of process emissions,positioning concrete infrastructure as vast carbon reservoirs.However,systematic analysis reveals fundamental limitations challenging this assumption.Cement production generates concentrated CO2pulses during manufacturing while carbonation proceeds slowly through diffusion-limited processes spanning decades,creating critical temporal asymmetry.When properly accounted for through time-adjusted climate assessments,this mismatch reduces claimed benefits by 30%-60%compared to conventional global warming potential calculations.Moreover,synthesis of published experimental data across 99 scenarios demonstrates that 52%exhibit less than 50%probability of achieving net emission reductions,with compressive strength penalties often requiring additional binder use that erodes nominal carbon gains.Critically,this perspective exposes three systematic failures in current climate accounting:①temporal frameworks treating decades-delayed absorption as equivalent to immediate emission avoidance,②selective reporting obscuring widespread performance failures,and③policy prioritization allocating resources to slow,uncertain processes while proven alternatives remain underutilized.By integrating sector-scale projections,lifecycle timing analyses,and comprehensive performance distributions under consistent boundaries,this cross-study synthesis reveals patterns invisible when research remains fragmented—establishing evidence-based hierarchies for near-term decarbonization.In contrast,proven alternatives demonstrate superior performance:supplementary cementitious materials offer 11%-34%emission reductions through direct clinker substitution,structural design optimization achieves 18.5%reductions without compromising safety,and service life extension strategies enable 75%total reduction potential by 2100—far exceeding carbonation-dependent pathways.Consequently,while carbonation remains chemically viable,its slow kinetics,performance uncertainty,and temporal misalignment with climate targets necessitate policy recalibration prioritizing transparent temporal accounting and proven alternatives over uncertain future absorption processes. 展开更多
关键词 Cement carbonation Carbon accounting Climate policy Emission reduction Carbon capture
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Application of an optimized non-invasive prenatal testing for thalassemia based on change of haplotype doses 认领 引用
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作者 Fei Sun Yao Zhou +9 位作者 Xing Zhao Qiuling Jie Linna Ma Dan Lin Yaxuan Li Yangqing Mai Ge Gao Yongfang Zhang Qi Li Yanlin Ma 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2026年第3期488-496,共9页
Patients affected by monogenic diseases impose a substantial burden on both themselves and their families.The primary preventive measure,i.e.,invasive prenatal diagnosis,carries a risk of miscarriage and cannot be per... Patients affected by monogenic diseases impose a substantial burden on both themselves and their families.The primary preventive measure,i.e.,invasive prenatal diagnosis,carries a risk of miscarriage and cannot be performed early in pregnancy.Hence,there is a need for non-invasive prenatal testing(NIPT)for monogenic diseases.By utilizing enriched cell-free fetal DNA(cffDNA)from maternal plasma,we refine the NIPT method,which combines targeted region capture technology,haplotyping,and analysis of informative site frequency.We apply this method to 93 clinical families at genetic risk for thalassemia,encompassing various genetic variant types,to establish a workflow and evaluate its efficiency.Our approach requires only 3 ng of DNA input to generate 0.1 Gb informative target genomic data and leverages a minimum of 3%cffDNA.This method has a 98.16%success rate and 100%concordance with conventional invasive methods.Furthermore,we demonstrate the ability to analyze fetal genotypes as early as eight weeks of gestation.This study establishes an optimized NIPT method for the early detection of various thalassemia disorders during pregnancy.This technique demonstrates high accuracy and potential for clinical application in prenatal diagnosis. 展开更多
关键词 Cell-free fetal DNA Non-invasive prenatal testing Thalassemia Hybrid capture Haplotype
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Large-scale PM2.5 removal and CO2 direct air capture to mitigate ambient air pollution and combat global climate change 认领 引用
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作者 David Y.H.Pui Qingfeng Cao +2 位作者 Thomas Kuehn Charles Lo Sheng-Chieh Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第8期37-47,共11页
This paper summarizes a decade of development of a Solar-Assisted Large-Scale Cleaning System(SALSCS)aimed at mitigating urban PM2.5.This effort has led to the construction and operation of four SALSCS units locate... This paper summarizes a decade of development of a Solar-Assisted Large-Scale Cleaning System(SALSCS)aimed at mitigating urban PM2.5.This effort has led to the construction and operation of four SALSCS units located in Xi'an(China),Yancheng(China),and New Delhi(India).Six papers have been published to document the modeling,design,construction,operation,and measurement of three generations of SALSCSs.The Weather Research and Forecasting(WRF)model was utilized to obtain local meteorological information and solar intensity conditions around the SALSCS.Reynolds-Averaged Navier-Stokes(RANS)simulations and Large Eddy Simulation(LES)have been employed to study the flow patterns and clean air concentration profiles near the units.The first generation SALSCS(Xi'an)takes the form of an updraft solar tower that utilizes solar heating to drive a large volume of air flow through the SALSCS.Filters are positioned along the flow path to remove PM2.5,resulting in cleaner air exiting the top of the tower.In the second generation SALSCS(Yancheng),the media filters are replaced with water spray to scrub out PM2.5.The third generation SALSCS(New Delhi)employs a set of fans to draw PM2.5 from the tower inlet through prefilters and final filters,blowing the cleaned air out near ground level to pedestrians surrounding the SALSCS.A proposal is presented that combines the 1st and 2nd Generation SALSCSs equipped with solar panels and direct air capture(DAC)of CO2 to achieve energy self-sufficiency and large-scale capture of 100 million tons of CO2 annually(100 Mt CO2/yr). 展开更多
关键词 PM2.5 CO2 Global climate change Solar-assisted large-scale cleaning system Direct air capture Sustainability
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Electron-modulated ZrP@GO heterostructures enabling synergistic proton-electron transfer for energy-efficient amine regeneration in CO2capture 认领 引用
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作者 Jia Xiong Qiang Sun +5 位作者 Liwen Ke Shaofei Wang Zirui Wang Hongxia Gao Zhiwu Liang Yu Mao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期326-336,I0009,共11页
Catalytic regeneration stands as a pivotal technology to address the high-energy-consumption bottleneck inherent in the regeneration step of amine-based CO2capture systems.However,existing solid acid catalysts suff... Catalytic regeneration stands as a pivotal technology to address the high-energy-consumption bottleneck inherent in the regeneration step of amine-based CO2capture systems.However,existing solid acid catalysts suffer from insufficient density of acidic sites and poor proton-electron transfer synergy,which severely limits their practical applications.To address this challenge,this study designed and fabricated a two-dimensional zirconium phosphate@graphene oxide(ZrP@GO)heterostructured catalyst with a built-in interfacial electric field,and proposed for the first time a"dual-acid synergy mediated by electron transfer"catalytic mechanism:a built-in electric field is constructed through the interfacial electron coupling between ZrP and GO,which precisely regulates the activity of Brønsted acid/Lewis acid sites and achieves dynamic matching between the function of acid sites and the proton-coupled electron transfer(PCET)process.Compared with the non-catalytic system,the optimal ZrP@GO-10 composite increases the instantaneous CO2desorption rate by 1090%,reduces the regeneration heat duty by 60%,and maintains excellent catalytic stability after 10 desorption cycles.Density functional theory(DFT)calculations reveal that the interfacial electron coupling effect of ZrP@GO constructs a"bond activation-proton transfer"dual-path synergy mechanism by directionally regulating the charge density distribution and enhancing the PCET reaction kinetics.This mechanism can simultaneously reduce the cleavage energy barrier of the carbamate C-N bond and the deprotonation energy barrier of protonated amines(MEAH+),clarifying the essence of the catalyst for achieving low-temperature and low-energy consumption regeneration from a theoretical perspective.This study provides a novel and efficient catalytic paradigm for amine solution regeneration,and promotes the practical application of amine-based CO2capture technology. 展开更多
关键词 CO2capture Catalytic desorption Heterostructure Zirconium hydrogenphosphate Energy consumption
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Robust and efficient membrane contactor for carbon dioxide capture enabled by thin-film composite Janus membrane 认领 引用
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作者 Wenting Zhou Chunlei Su +4 位作者 Dejun Feng Yuanmiaoliang Chen Liting Pan Di He Zhangxin Wang 《ENGINEERING Environment》 SCIE EI CAS CSCD 2026年第3期33-44,共12页
Gas-liquid membrane contactor(GLMC)technology shows significant promise for industrial carbon dioxide(CO2)capture,but its adoption is hindered by the poor wetting resistance or low CO2 absorption rate of convent... Gas-liquid membrane contactor(GLMC)technology shows significant promise for industrial carbon dioxide(CO2)capture,but its adoption is hindered by the poor wetting resistance or low CO2 absorption rate of conventional monolithic hydrophobic membranes.This work presents a thinfilm composite(TFC)Janus membrane fabricated by coating a polyvinyl alcohol(PVA)layer featuring density and hydrophilicity onto a commercial hydrophobic polyvinylidene fluoride(PVDF)membrane substrate for GLMC applications.The TFC Janus membrane demonstrated robust wetting resistance during a 72-h GLMC experiment while maintaining a relatively high CO2 absorption rate(2.85×10-3 mol/(m2·s)),enabling robust and efficient CO2 capture.Diffusion experiments and breakthrough pressure tests attributed the exceptional wetting resistance to a combination of size exclusion and high capillary pressure within the dense PVA layer,which effectively hinders CO2 absorbent solutions from accessing the hydrophobic PVDF substrate.Furthermore,membrane impedance measurements and ultrasonic time-domain reflectometry analysis revealed that the high CO2 absorption rate resulted from an expanded gas-liquid interface created by the PVA layer penetrating into the PVDF substrate.Overall,this work offers valuable insights into the design and optimization of high-performance GLMC membranes,advancing practical applications of GLMC technology. 展开更多
关键词 Gas-liquid membrane contactor Thin-film composite membrane Janus membrane Carbon dioxide capture Membrane wetting
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Increased acidity of nitrogen heterocyclic compounds on water microdroplets facilitates CO2 capture 认领 引用
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作者 Ruijing Wang Shixuan Wang +4 位作者 Chenghui Zhu Jianze Zhang Richard N.Zare Chongqin Zhu Xinxing Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期352-356,共5页
Species at the air-water interface of microdroplets often display distinct acidity compared to the bulk.In this study,we report that pyrrole,imidazole,pyrazole,and 2H-1,2,3-triazole,a group of five-membered,planar,aro... Species at the air-water interface of microdroplets often display distinct acidity compared to the bulk.In this study,we report that pyrrole,imidazole,pyrazole,and 2H-1,2,3-triazole,a group of five-membered,planar,aromatic,nitrogen heterocyclic compounds that are basic in bulk water,exhibit strong acidity on microdroplets.The deprotonated anions of pyrrole,imidazole,and pyrazole can further react with CO2 to generate the corresponding carboxylic acids,but the triazole anion does not react with CO2.Calculation shows that partial solvation and the electric field on the air-water interface of the microdroplets are the main causes for the increased acidity,and the unique solvation structure of the triazole anion at the interface causes the reactive sites to be shielded by interfacial water molecules,thereby hindering reaction with CO2.These results demonstrate that the electric field and solvation structure of ions at the air-water interface play a decisive role in microdroplet chemistry for these compounds.We anticipate that the unique acidity and reactivity on microdroplets provide a new avenue that is rich in opportunities for green chemistry. 展开更多
关键词 Nitrogen heterocyclic compounds Microdroplet Air-water interface Acidity CO2capture
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Prediction Model for Carbonation Depth of Mineral Admixture Concrete Under Early-age CO2 Capture 认领 引用
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作者 ZHOU Ming WANG Feifan +2 位作者 WEN Xiaodong GUAN Xiaojun WENG Gongwei 《材料导报》 EI CAS CSCD 北大核心 2026年第9期176-183,共8页
Mineral admixture concrete carbon capture technology has emerged as a research focus in negative emission technologies due to its substantial carbon sequestration potential and high utilization rate of industrial soli... Mineral admixture concrete carbon capture technology has emerged as a research focus in negative emission technologies due to its substantial carbon sequestration potential and high utilization rate of industrial solid waste.However,early-age carbonation significantly increases the risk of steel reinforcement corrosion.Existing carbonation models,primarily based on 28-day standard-cured specimens,exhibit considerable conservative bias when predicting the carbonation behavior of concrete containing high-volume mineral admixtures and subjected to early-age exposure.To address this limitation,fifteen groups of fly ash(FA)and ground granulated blast furnace slag(GGBS)concrete specimens were prepared and subjected to accelerated carbonation tests after 14 days of standard curing.Building upon the Huang Shiyuan model framework,a Mineral Admixture Carbonation Rate Influence Coefficient(Km)was introduced for the first time to characterize the early-age effects of admixture type and dosage,and the Particle Swarm Optimization(PSO)algorithm,with global search capability in multi-parameter nonlinear systems,was used to optimize the parameters.The newly introduced Kmcoefficient quantitatively captures the differential effects of FA and GGBS,supported by microstructural reasoning.Independent validation confirmed its general applicability even for concrete incorporating FA,GGBS,and a wider range of water-to-binder ratios(W/B)(measured-to-predicted ratio:0.93±0.15).This model provides a theoretical tool for managing the early-age steel reinforcement corrosion risk in carbon capture concrete. 展开更多
关键词 carbon capture mineral admixture early-age particle swarm optimization prediction mode
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Enhanced Ultramicropore of Biomass-Derived Porous Carbon for Efficient and Low-Energy CO2 Capture:Integration of Adsorption and Solar Desorption 认领 引用
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作者 Pengcheng Guo Ruiqi Xue +4 位作者 Qiao Zou Xiancheng Ma Changqing Su Zheng Zeng Liqing Li 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第2期460-470,共11页
Biomass-derived carbon for CO2 capture is significant for reducing carbon emissions and recovering C1 resources,contributing to zero-carbon goals.However,developing biomass-based porous carbon with high CO2 capt... Biomass-derived carbon for CO2 capture is significant for reducing carbon emissions and recovering C1 resources,contributing to zero-carbon goals.However,developing biomass-based porous carbon with high CO2 capture while reducing regeneration energy consumption remains challenging.This study leverages the tunable pore structure and photothermal properties of biomass-based carbon,integrating adsorption and solar-driven desorption for efficient,low-energy CO2 capture.Specifically,mechanical compaction increased the ultramicropore volume of the porous carbon by 25%,leading to a corresponding 25%enhancement in CO2 adsorption capacity.Theoretical calculations and correlation analyses further elucidated that ultramicropore volume,nitrogen doping,and oxygen doping play significant roles in CO2 adsorption.Under one-sun illumination,the surface temperature of the prepared porous carbon rapidly rose to 57.1℃ within 6 min and stabilized around 71.0℃,resulting in a regeneration efficiency of 75%.These findings provide valuable theoretical and practical insights for the development of high-efficiency,low-energy CO2 capture technologies. 展开更多
关键词 CO2capture porous carbon solar desorption ultramicroporous structure
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Development and verification of a Monte Carlo dose calculation program“MagicDose”for boron neutron capture therapy 认领 引用
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作者 Ai‑Kou Sun Zhen‑Ping Chen +9 位作者 Ke‑Kun Gao Lin Zhu Cheng‑Wei Liu Zhi‑Qiang Wu Chao Yang Tong Liu Song Wang Zi‑Zhu Zhang Yi‑Zheng Chong Tao Yu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第8期16-37,共22页
Dose calculation is the foundation of boron neutron capture therapy(BNCT).MagicDose,a dose calculation program for the BNCT treatment planning system,is developed based on the Monte Carlo method.First,the voxel phanto... Dose calculation is the foundation of boron neutron capture therapy(BNCT).MagicDose,a dose calculation program for the BNCT treatment planning system,is developed based on the Monte Carlo method.First,the voxel phantom of the modified Snyder head with 16 and 8 mm is constructed,and the results from MagicDose and MCNP are presented as two-dimensional coordinate points(Xn,Yn),comparing their relationship relative to the y=x linear function,while analyzing their respective calculation time.A modified Snyder head phantom with a tumor at three different spatial resolutions of 16,8,and 1 mm was constructed,and the depth-dose rate curves and spatial distribution maps are analyzed.Finally,the patients’head CT data were used for the application.The results indicate that the calculations from MagicDose and MCNP exhibit high consistency and demonstrate that MagicDose offers superior computational efficiency compared to MCNP,with improvements of approximately 31.24%and 28.65%at spatial resolutions of 16 and 8 mm,respectively.As the spatial resolution increased,the variability in the dose rate results decreased.The voxel size and number of threads are both inversely proportional to the calculation time.For the CT model,a voxel phantom with a spatial resolution of 1 mm×1 mm×1 mm is successfully constructed.The calculation results showed that the boron dose rate contribution significantly exceeds that of the other dose components,with the spatial distribution of the total relative biological effect dose rate clearly delineating the boundaries between the high-and low-dose rate regions.The above results verify the correctness of MagicDose,which also provides a reference for optimizing the design of voxel phantoms for clinical treatment. 展开更多
关键词 Boron neutron capture therapy(BNCT) Monte Carlo Dose calculation MCNP Voxel phantom Spatial resolution
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Ultrastable sp2 carbon-conjugated porous organic cage for selective perchlorate capture and fast lithium-ion transport 认领 引用
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作者 Fenglei Qiu Xinting Zhang +4 位作者 Fengquan Liu Linfeng Liang Wenjing Wang Kongzhao Su Daqiang Yuan 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2026年第3期64-69,共6页
Organic cage compounds,which are among the most important classes of supramolecular hosts,have been found to be capable of capturing various guests through host-guest interactions due to their inherent cavities.To dat... Organic cage compounds,which are among the most important classes of supramolecular hosts,have been found to be capable of capturing various guests through host-guest interactions due to their inherent cavities.To date,the exploration of potential applications based on such host-guest chemistry has been a subject of intensive research.Herein,we report a highly stable sp2carbon-conjugated porous organic cage(POC),abbreviated as sp2c-POC3,formed via the Knoevenagel reaction between tetraformyl-functionalized calix[4]resorcinarene and V-shaped diacetonitrile subunits.X-ray crystallographic analysis reveals that sp2c-POC3 is a[2+4]long lantern-shaped cage.It contains four rhombic windows with an average edge length of approximately 2.1 nm and a large cavity with a volume of approximately 782Å3.Notably,this cage can selectively capture perchlorate(ClO4-)anions.Taking advantage of such anion trapping ability and the porous nature,a quasi-solid-state electrolyte(QSSE)based on sp2c-POC3 and incorporating LiClO4 has been rationally designed.This sp2c-POC3-based QSSE exhibits a high ionic conductivity of 2.5×10-3S cm-1at room temperature. 展开更多
关键词 Porous organic cage resorcinarene Perchlorate capture Host-guest interaction Lithium-ion transport
Simulation and Optimization of Urban Small-Scale Centralized Bio-Gas Purification Process Based on Methyl Diethanolamine Absorbent 认领 引用
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作者 Luling Li Minghui Li +9 位作者 Zhengxiang Xu Haofeng Lin Xuemei Lang Peiming Li Hengrong Zhang Dongxu Ji Jian Liu Jianhui Liu Guang Yang Shuanshi Fan 《Frontiers in Heat and Mass Transfer》 EI CAS 2026年第1期170-186,共17页
This study addresses the energy-intensive challenge of small-scale biogas upgrading by optimizing a chemical absorption process employing methyl diethanolamine(MDEA).Focusing on a typical distributed application of 30... This study addresses the energy-intensive challenge of small-scale biogas upgrading by optimizing a chemical absorption process employing methyl diethanolamine(MDEA).Focusing on a typical distributed application of 300 Nm3/d,we developed an integrated simulation-optimization framework using Aspen HYSYS 14.0 to systematically evaluate the effects of critical operating parameters—absorption pressure,MDEA concentration,flow rate,temperature,number of trays,and reboiler duty—on methane purity and energy consumption.The key finding is the identification of an optimal parameter set:absorption pressure of 1200 kPa,MDEA concentration of 20mol%,lean flow rate of 2.5 kmol/h,temperature of 298.15 K,20 absorber trays,10 regenerator trays,and a reboiler duty of 4 kW,which enabled the product gas to achieve a high CH4 concentration of 97mol%,compliant with pipeline standards.A detailed energy consumption analysis revealed that the reboiler is the most energy-intensive unit,accounting for 75.40%of the total 5.29 kW energy consumption,followed by the gas compressor(23.38%).The specific energy consumption for CH4 recovery and the Energy Consumption Index(ECI)were quantified at 0.8852 kWh/kg CH4and 6.82,respectively.This work provides a validated optimization strategy and critical energy breakdown,offering practical guidance for enhancing the technical and economic viability of small-scale,centralized biogas purification systems. 展开更多
关键词 Chemical absorption process CO2capture bio-gas optimization MDEA
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The Staged,Pressurized Oxy-Combustion Technology:Status and Application to Boiler Retrofits to Yield Carbon-Negative Power via Biomass 认领 引用
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作者 Duarte Magalhaes Mao Cheng +1 位作者 Zachariah Wargel Richard L.Axelbaum 《Engineering》 SCIE EI CSCD 2026年第4期158-167,共10页
Recognizing the benefits of pressurization and fuel staging on the efficiency of oxy-combustion,the staged,pressurized oxy-combustion(SPOC)process was introduced in 2012.The combination of fuel staging and pressurized... Recognizing the benefits of pressurization and fuel staging on the efficiency of oxy-combustion,the staged,pressurized oxy-combustion(SPOC)process was introduced in 2012.The combination of fuel staging and pressurized oxy-combustion results in a more compact plant,a higher plant efficiency and reduced costs for pollutant and greenhouse gas removal compared with plants equipped with conventional carbon capture.This approach to power generation enables a modular boiler design and optimizes the plant for flexible operation,which is essential to meet the demands of the modern grid when it contains intermittent power sources.Originally designed to burn coal,the SPOC process is well-suited for biomass because the combustion of biomass leads to a high moisture content in the flue gas and the SPOC process is able to recover the latent heat of this moisture,enhancing system performance over that of traditional biomass combustion at atmospheric pressure.The present work is focused on evaluating the potential for utilizing the SPOC process in retrofit applications wherein the boilers of an existing plant are replaced with the SPOC process,and woody biomass is used as the fuel to yield carbon-negative power.Two applications are considered:power generation and cogeneration(heat and power).Modeling these systems in Aspen Plus demonstrates that the SPOC process surpasses the performance of baseline plants with post-combustion capture(PCC)for both power generation and cogeneration.Specifically,compared to a PCC equipped plant,the SPOC power plant has 33%higher efficiency,and the SPOC cogeneration plant reaches 42%higher net energy.Experimentally,the existing SPOC facility was fired for the first time with 100%biomass and after minor improvements were made to the feeding system,the facility demonstrated excellent performance during startup,steady-state operation and turndown. 展开更多
关键词 Staged pressurized oxy-combustion Carbon negative power Cogeneration Industrial decarbonization Carbon capture and storage
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