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Modification mechanism of caking property of polystyrene waste using low-temperature pyrolysis and its use in coal-blending coking 认领 引用
1
作者 Xiangchun Liu Ying Chen +1 位作者 Huan Song Ping Cui 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第1期93-101,共9页
Polystyrene(PS)waste was depolymerized using a low-temperature pyrolysis treatment(LTPT)to increase its caking index.The mechanism of caking index modification was revealed by using Fourier transform infrared spectros... Polystyrene(PS)waste was depolymerized using a low-temperature pyrolysis treatment(LTPT)to increase its caking index.The mechanism of caking index modification was revealed by using Fourier transform infrared spectroscopy,thermogravimetric(TG)analysis,pyrolysis-gas chromatography with mass spectrometric detection,and solid-state13C nuclear magnetic resonance spectroscopy.The crucible coal-blending coking tests were carried out using an industrial coal mixture and the treated-PS with the highest caking index(PS300)or raw PS.Some properties of the resultant cokes were also analyzed.It was demonstrated that the caking index of PS dramatically increased by LTPT;however,exceeding 300℃ did not yield any benefit.The caking index increased due to the formation of the caking components,whose molecules are medium in size,caused by LTPT.Additionally,the coke reactivity index of the coke obtained from the mixture containing PS300 decreased by 5.1%relative to that of the coke made from the mixture with PS and the coke strength after reaction index of the former increased by 7.3% compared with that of the latter,suggesting that the ratio of depolymerized PS used for coal-blending coking could increase relative to that of PS. 展开更多
关键词 Polystyrene pyrolysis Caking index Coking property
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Mechanism of extracting poorly-caking components from Shenhua long-flame coal using[N4441][Cl] 认领 引用
2
作者 Shixian Fang Ying Chen +3 位作者 Yutong Qian Shulin Wang Xiangchun Liu Ping Cui 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第5期57-63,共7页
The effects of different kinds of ionic liquids(ILs)on the caking property of Shenhua long-flame coal(SHLC)were studied.SHLC and its residue after[N4441][Cl]treatment under optimum conditions were characterized by ... The effects of different kinds of ionic liquids(ILs)on the caking property of Shenhua long-flame coal(SHLC)were studied.SHLC and its residue after[N4441][Cl]treatment under optimum conditions were characterized by Fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TG),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),Raman spectroscopy,and pyrolysis-gas chromatography and mass-spectrometric analysis(Py-GC/MS).The results showed that the ILs used could extract the poorly-caking components from SHLC,and[N4441][Cl]with C3H6O as a solvent exhibited the best effect among the ILs and solvents used.[N4441][Cl]could destroy the H bonds in SHLC,and the structure of the cross-linked macromolecules of SHLC was loosed,leading to the release of the small molecules within the macromolecular framework of SHLC.Additionally,[N4441][Cl]could easily penetrate into the interior of the relaxed SHLC and break the weak covalent bonds(e.g.,C-O bonds)of the macromolecules of SHLC.As a result,aromatic hydrocarbons with 3‒5 rings and aliphatic side chains,which are the precursor of the poorly-caking components,were formed and were then extracted from SHLC by C3H6O.Consequently,[N4441][Cl]treatment could decrease the caking property,thermal ability,and macromolecular size of SHLC. 展开更多
关键词 Low-rank coal Ionic liquids Caking property Functional groups
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Modification mechanism of caking and coking properties of Shenmu subbituminous coal by low-temperature rapid pyrolysis treatment 认领 引用 被引量：9
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作者 Xiang-chun Liu Bin Fang +4 位作者 Zhi-gang Zhao Rui-lun Xie Zhao Lei Qiang Ling Ping Cui 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2019年第10期1052-1060,共9页
Shenmu(SM)subbituminous coal without caking property was treated by low-temperature rapid pyrolysis(LTRP)to modify its caking and coking properties.The treated samples were characterized by Fourier transform infrared ... Shenmu(SM)subbituminous coal without caking property was treated by low-temperature rapid pyrolysis(LTRP)to modify its caking and coking properties.The treated samples were characterized by Fourier transform infrared spectrometry,vitrinite reflectance,and X-ray diffraction to determine the modification mechanism.Moreover,caking index(G)and coking indices(mechanical strength,coke reactivity,and coke strength after reaction)were employed to evaluate caking and coking properties,respectively.The results showed that SM coal was gradually upgraded with increasing processing temperature.Furthermore,the G values for the treated samples were significantly higher than that for SM coal,and G reached the maximum value at 450℃,implying the modification of caking property and the existence of an optimum temperature(450℃).Additionally,laboratory coking determinations showed that LTRP increased the mechanical strength of coke and coke strength after reaction and decreased coke reactivity when the treated coals were used in the coal blends instead of raw SM coal.Overall,LTRP treatment is effective to improve the caking and coking properties of SM coal.A mechanism was proposed for the modification.Suitable upgrading degree with suitable molecular masses and some releasable hydrogen-rich donor species present within the coal,which dominate the development of caking property,is important. 展开更多
关键词 Caking property Coking property Non-caking coal Low-temperature rapid pyrolysis Subbituminous coal
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Amorphous and humidity caking: A review 认领 引用 被引量：8
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作者 Mingyang Chen Dejiang Zhang +5 位作者 Weibing Dong Zhilong Luo Chao Kang Haichao Li Gang Wang Junbo Gong 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第6期1429-1438,共10页
Caking of products is a common and undesired phenomenon in food, chemical, pharmaceutical, and fertilizer industries which leads to extra cost and irregular quality. In general, caking processes could be identified as... Caking of products is a common and undesired phenomenon in food, chemical, pharmaceutical, and fertilizer industries which leads to extra cost and irregular quality. In general, caking processes could be identified as amorphous caking or humidity caking. In this review, history of studying caking, formation, methods, and prospects of these two caking processes are summarized and discussed. The relevant studies from the 1920 s to today are mentioned briefly. According to the different properties(i.e. hygrocapacity, hygrosensitivity, mechanical properties, and diffusion behavior) of amorphous powders and crystals, the conditions and mechanisms of amorphous and humidity caking are discussed. It is summarized that glass transition, moisture sorption, quantitative methods characterizing caking, accelerated caking tests, and simulation of caking behaviors are the main aspects that should be studied for a caking process. The methods for these five aspects are reviewed. Potential research points are proposed including caking of mixed particles, caking with phase transition or polymorph transition,non-homogenous caking, and simulation of caking. 展开更多
关键词 Agglomeration Particle Powder technology Amorphous caking Humidity caking
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Experimental and mechanistic study on chemical looping combustion of caking coal 认领 引用 被引量：3
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作者 Xiuli Zhang Zhengdong Gao +3 位作者 Yongzhuo Liu Yuanhao Hou Xiaoqing Sun Qingjie Guo 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第9期89-96,共8页
Under high-temperature batch fluidized bed conditions and by employing juye coal as the raw material,the present study determined the effects of the bed material,temperature,OC/C ratio,steam flow and oxygen carrier cy... Under high-temperature batch fluidized bed conditions and by employing juye coal as the raw material,the present study determined the effects of the bed material,temperature,OC/C ratio,steam flow and oxygen carrier cycle on the chemical looping combustion of coal.In addition,the variations taking place in the surface functional groups of coal under different reaction times were investigated,and the variations achieved by the gas released under the pyrolysis and combustion of Juye coal were analyzed.As revealed from the results,the carbon conversion ratio and rate were elevated significantly,and the volume fraction of the outlet CO2remained more than 92%under the oxygen carriers.The optimized reaction conditions to achieve the chemical looping combustion of Juye coal consisted of a temperature of 900℃,an OC/C ratio of 2,as well as a steam flow rate of 0.5 g·min-1.When the coal was undergoing the chemical looping combustion,volatiles primarily originated from the pyrolysis of aliphatic-CH3and-CH2,and CO and H2were largely generated from the gasification of aromatic carbon.In the CLC process,H2O and CO2began to separate out at 270℃,CH4 and tar began to precipitate at 370℃,and the amount of CO2was continuously elevated with the rise of the temperature. 展开更多
关键词 Caking coal Chemical looping combustion Optimized reaction conditions
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Synergistic reaction behavior of pyrolysis and reduction of briquette prepared by weakly caking coal and metallurgical dust 认领 引用 被引量：2
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作者 Zheng-jian Liu Ming-hui Cao +4 位作者 Jian-liang Zhang Run-sheng Xu Yao-zu Wang Ji-yong Yu Yu-chen Zhang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2023年第7期1367-1380,共14页
Co-carbonization of weakly caking coal and zinc-containing dust to prepare highly reactive ferro-coke and collaboratively recover zinc powder is one of the feasible ways for steel enterprises to recycle zinc-containin... Co-carbonization of weakly caking coal and zinc-containing dust to prepare highly reactive ferro-coke and collaboratively recover zinc powder is one of the feasible ways for steel enterprises to recycle zinc-containing dust.The pyrolysis mass loss behavior of adding blast furnace dust with different zinc contents to different ferro-coke materials was systematically studied by thermogravimetry and differential thermogravimetry analysis,and the kinetic mechanism of pyrolysis-reduction reaction of hybrid briquette was explored.The results of thermogravimetric curve analysis show that the addition of zinc oxide to the sample has no significant effect on the mass loss rate of the sample below 580℃,and the pyrolysis mass loss of zinc oxide mainly occurs between 800 and 1000℃.Kinetic analysis results show that the pyrolysis of zinc-containing samples is controlled by chemical reactions below 580℃.The reaction at 580–700℃ is controlled by the nucleation and growth model,and that above 700℃ is mainly controlled by diffusion.The results of X-ray diffraction analysis show that the pyrolysis process can effectively remove zinc oxide from ferro-coke. 展开更多
关键词 Zinc-containing dust Weakly caking coal Ferro-coke Pyrolysis Reduction Thermal reaction analysis Kinetic analysis
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Caking property and active components of coal based on group component separation 认领 引用 被引量：8
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作者 Qin Zhihong Li Xiang +2 位作者 Sun Hui Zhao Cuicui Rong Liman 《International Journal of Mining Science and Technology》 EI CAS CSCD 2016年第4期571-575,共5页
The content and the caking index of the heavy,the dense medium and the loose medium components of coal,obtained by extraction and stripping with CS_2/N-methyl-2-pyrrolidinone mixed solvent(1:1 by volume),were studied ... The content and the caking index of the heavy,the dense medium and the loose medium components of coal,obtained by extraction and stripping with CS_2/N-methyl-2-pyrrolidinone mixed solvent(1:1 by volume),were studied and correlated with the caking property of raw coals.Images of the three group components after heat treatment were analyzed.The results show that both caking index(G) and maximum thickness of plastic layer(Y) of coals have a good linear relationship with the content of the medium component;the dense medium and the loose medium components are the two key factors to determine the caking property of raw coals-they are the source materials of fluidity and swelling of coal,respectively;the heavy component without the swelling and fluidity was cohered by the other components;two new indexes,which can extend current understanding of the caking properties,were introduced. 展开更多
关键词 Swelling Fluidity Group components Caking propertyActive components
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秀外慧中—富士康CAKING机箱 认领 引用
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作者 姜筑 《微型计算机》 北大核心 2002年第9期21-21,共1页
关键词 富士康CAKING机箱 计算机 电磁屏蔽 钢板外壳
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Model-based crystallization strategy of viscous systems for biomass crystal production with anti-caking function 认领 引用
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作者 Gaolong Song Li Tong +7 位作者 Lingdi Meng Linjin Song Leida Zhang Wei Zhao Songgu Wu Mingyang Chen Mingxuan Li Junbo Gong 《Particuology》 SCIE EI CAS CSCD 2026年第4期241-252,共12页
The crystallization separation of biomass chemical crystals in high-viscosity aqueous solutions has long been a major challenge in the field of biomass refining.Inappropriate crystallization strategies render the prep... The crystallization separation of biomass chemical crystals in high-viscosity aqueous solutions has long been a major challenge in the field of biomass refining.Inappropriate crystallization strategies render the prepared biomass prone to caking and subsequent deterioration.To address this challenge,a tailored model-based two-stage crystallization strategy for viscous systems was developed for anti-caking bio-based derivative crystal production.The first stage focused on nucleation to prepare seed crystals with good dispersion in viscous solutions,while the second stage inhibits nucleation to design the crystal product size.Meanwhile,a temperature-governed crystallization kinetic model and a humidity-driven caking model were coupled to develop a crystallization-caking feedback regulation framework,enabling direct generation of optimal crystallization trajectories based on predefined anti-caking targets.In the crystallization of glucono delta-lactone(GDL),compared with the previous anti-caking crystallization strategies,the crystal D50 obtained by the crystallization strategy for viscous systems developed in this study increased from 414 to 486μm,and the deviation of crystal products from the target particle size decreased from 17.2%to 2.8%.While the anti-caking performance has improved from 27 to 48 days,the design efficiency has also increased by an order of magnitude. 展开更多
关键词 Crystallization model Particle size control Crystal caking Bio-based crystal
Discrete elemental parameter calibration of the bonding model for caking compound fertilizer utilized in oilseed rape mechanized direct seeding 认领 引用 被引量：1
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作者 Wenli Xiao Qingxi Liao +2 位作者 Yitao Liao Lei Wang Xingyu Wan 《International Journal of Agricultural and Biological Engineering》 SCIE 2025年第4期17-25,共9页
To address the problem that granular compound fertilizer is prone to agglomeration during mechanized direct seeding of oilseed rape in the middle and lower reaches of the Yangtze River,which causes clogging of the fer... To address the problem that granular compound fertilizer is prone to agglomeration during mechanized direct seeding of oilseed rape in the middle and lower reaches of the Yangtze River,which causes clogging of the fertilizer discharger and leads to a reduction in the uniformity and stability of fertilizer discharge,research on the crushing mechanism of caking compound fertilizer was performed.Considering that it is difficult to measure the bonding force between caking fertilizer particles directly,a simulation model of caking composite fertilizer was established with the bonding model in EDEM discrete element software.To decrease error between the simulation and physical test results,the normal contact stiffness,tangential contact stiffness,critical normal stress,critical tangential stress,bonding radius,and other parameters of the bonding model of caking composite fertilizer were calibrated.The three-dimensional structure of the caking composite fertilizer was obtained via three-dimensional scanning,the critical crushing displacement and critical crushing force of the caking composite fertilizer were measured via compression testing with a mass spectrometer,and the optimal parameter combination of the bonding model was determined via EDEM discrete element simulation of the Plackett-Burman test,steepest ascent test,and Box-Behnken test.The results of the simulated compression tests under the optimal parameter combination show that the relative errors of the critical crushing displacement and critical crushing force with respect to the physical test results were 0.296%and 0.343%,respectively.Using the crushing rate of caking compound fertilizer as an evaluation index,the feasibility of the calibrated parameters was verified for a four-head spiral two-row fertilizer discharger installed in a direct seeding machine for oilseed rape.The results show that the relative errors of the caking fertilizer crushing rates from the simulation relative to those of the bench and field tests were 5.81%and 5.06%,respectively,indicating that the calibration parameters of the discrete element model were accurate and could be used for parameter analysis of caking fertilizer with a discrete element model.These results can provide a reference for the structural optimization of fertilizer discharger crushing of caking fertilizer of direct seeding machine for oilseed rape. 展开更多
关键词 caking compound fertilizer bonding model three-dimensional scanning parameter calibration discrete element method
Measurement and quantification of caking in excipients and food products with emphasis on the non-homogeneous interaction with ambient moisture 认领 引用 被引量：3
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作者 Katrina Brockbank Brian Armstrong Jamie Clayton 《Particuology》 SCIE EI CAS CSCD 2021年第3期75-83,共9页
Whilst caking occurs via several different mechanisms,absorption and migration of moisture is frequently the most dominant mechanism within the food and pharmaceutical industry.Fully understanding the propensity to ca... Whilst caking occurs via several different mechanisms,absorption and migration of moisture is frequently the most dominant mechanism within the food and pharmaceutical industry.Fully understanding the propensity to cake is important for minimising down-stream process issues,however most characterisation techniques assume that moisture induced caking occurs homogenously through the sample resulting in a uniformly caked powder bed.In this study,the effect of moisture induced caking on powder flowability was investigated using powder rheology.Several materials,including skimmed milk powder(SMP)and sulphated methyl ester(SME)were stored for several days under controlled humidity conditions.The flow energies,a measure of the resistance to flow,were measured at 24 h intervals using an FT4 Powder Rheometer.As the energy is measured as a function of the bed height,variations in the powder bed are also captured.The results demonstrated that caking does not always occur uniformly,instead a caked region(or crust)forms at the air-powder interface and then progresses through the powder bed.Furthermore,the strength of this caked region was shown to increase over several days before stabilising. 展开更多
关键词 Powder Caking Crust formation Powder rheometry Relative humidity
Micronization of wheat bran:influence on the quality and starch digestibility of dietary fiber-enriched steamed sponge cake 认领 引用
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作者 Yang Li Haoran Wang +3 位作者 Bei Fan Yonghu Zhang Fengzhong Wang Lili Wang 《Food Science and Human Wellness》 SCIE CAS CSCD 2026年第4期1865-1876,共12页
Exploring an ideal carrier for superfine wheat bran dietary fiber is important for maximizing its health benefits. This study evaluated the batter rheology, texture, gel network structure, and starch digestibility of ... Exploring an ideal carrier for superfine wheat bran dietary fiber is important for maximizing its health benefits. This study evaluated the batter rheology, texture, gel network structure, and starch digestibility of steamed sponge cake(SPC) enriched with wheat bran of different particle sizes at 10%, 20%, and 30% addition. The results indicated that to maintain the quality(appearance, texture, and sensory attributes) of SPC without significant compromise, the addition of coarse bran(84-1 110 µm) should not exceed 10%. However, for superfine wheat bran(19 μm), increasing the addition from 10% to 30% did not impair the hardness, springiness, overall acceptability, gas cell structure, and relatively intact starch gel network of SPC. Moreover, the starch digestibility of SPC with 30% superfine wheat bran decreased from 90.1%(control) to 81.6%, and resistant starch content increased by 85.9%. This study suggests that products not requiring gluten development could be ideal carriers for high levels of micronized dietary fiber. 展开更多
关键词 Superfine wheat bran Steamed sponge cake Quality
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Mechanism and inhibition of trisodium phosphate particle caking: Effect of particle shape and solubility 认领 引用 被引量：2
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作者 Mingyang Chen Lanlan Lin +5 位作者 Yuqi Zhang Songgu Wu Ergang Liu Kun Wang Jingkang Wang Junbo Gong 《Particuology》 SCIE EI CAS CSCD 2016年第4期115-121,共7页
We investigated the influence of particle shape and solubility on the caking behavior of trisodium phosphate by considering the adhesion free energy and crystal bridge theory. Caking of trisodium phosphate during the ... We investigated the influence of particle shape and solubility on the caking behavior of trisodium phosphate by considering the adhesion free energy and crystal bridge theory. Caking of trisodium phosphate during the drying process under static conditions is a two-step process： adhesion followed by crystal bridge formation between particles. The adhesion free energy plays an important role in adhesion. Trisodium phosphate particles cannot adhere to each other and cake when the adhesion free energy is greater than a critical value, which varies with particle shape. Compared with granular particles, cylindrical particles have larger contact area between particles, which results in more crystal bridges forming and a higher caking ratio. Thus, the critical value is about 100 mJ/m^2 for cylindrical particles, but 60 mJ/m^2 for granular particles at 25 ℃. Concerning the solubility, when particles are similar shapes and soluble in the rinsing liquid, the caking ratio has a linear relationship with adhesion free energy. However, if the particles are insoluble in the rinsing liquid, caking can be completely prevented regardless of adhesion free energy because no crystal bridges form during the growth process. Hence, caking of trisodium phosphate particles could be inhibited by screening rinsing liquids, and optimizing the particle shape and size distribution. 展开更多
关键词 Caking Particle shape Solubility Adhesion free energy Crystal bridge Trisodium phosphate
Moisture sorption,thermal,and caking characteristics of L-lysine-carbonate granules 认领 引用 被引量：1
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作者 Suyeon An Sungahm Ahn +8 位作者 Andres Letona Ji Hyun Shin Seung Hoon Kang Jae Yun Jeong Sang Min Park Jun Woo Kim Daeung Yu Hee Chung Donghwa Chung 《Food Bioscience》 SCIE 2023年第3期2983-2990,共8页
L-Lysine,an essential amino acid,is often produced in the granular form of L-lysine-monohydrochloride(L-lysine-HCl).To address chemical waste and processing cost concerns associated with the production of L-lysine-HCl... L-Lysine,an essential amino acid,is often produced in the granular form of L-lysine-monohydrochloride(L-lysine-HCl).To address chemical waste and processing cost concerns associated with the production of L-lysine-HCl granules,an alternative process has been recently developed for the production of L-lysine as granules of L-lysine-carbonate(L-lysine-CO3).In the present study,the moisture sorption,thermal,and caking properties of L-lysine-CO3 granules were investigated in comparison with commercial L-lysine-HCl granules.L-Lysine-CO3 granules showed a popcorn-like surface structure(59.0%crystallinity),while L-lysine-HCl granules exhibited an angular crystalline structure(72.9%crystallinity).L-Lysine-CO3 granules had a less compact structure than L-lysine-HCl granules and showed excellent initial flowability comparable to L-lysine-HCl granules.L-Lysine-CO3 granules were more hygroscopic than L-lysine-HCl granules,probably due to their lower crystallinity and less compact structure.L-Lysine-CO3 granules began to undergo thermal decomposition at 192℃,probably due to CO2 release,followed by melting at 234℃ and further decomposition,while L-lysine-HCl granules underwent melting at 251℃,and then began to undergo thermal decomposition at 260℃.No glass transition was observed for either lysine-CO3 or L-lysine-HCl granules.Storage test under pressurized and accelerated conditions showed that L-lysine-CO3 granules were more prone to caking and formed harder agglomerates than L-lysine-HCl granules.The results showed that L-lysine-CO3 granules were more hygroscopic,less thermally stable,and more prone to caking,compared to commercial L-lysine-HCl granules.However,these properties of L-lysine-CO3 granules were at acceptable levels for commercial use,thus L-lysine-CO3 granules have high potential for commercial development. 展开更多
关键词 L-Lysine-carbonate granules Moisture sorption Thermal transition Thermal stability Caking
Rapid evaluating caking tendency of nonspherical crystals by developing a shape-based crystal bridge growth model 认领 引用
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作者 Mingxuan Li Mengdi Zhang +4 位作者 Wei Zhao Leida Zhang Mingyang Chen Dandan Han Junbo Gong 《Particuology》 SCIE EI CAS CSCD 2024年第12期265-278,共14页
Crystal caking is a decisive factor affecting the quality of high-end fine chemicals,whereas lack of shape-to-caking understanding results in considerable waste of time,severely delaying high-end fine chemical develop... Crystal caking is a decisive factor affecting the quality of high-end fine chemicals,whereas lack of shape-to-caking understanding results in considerable waste of time,severely delaying high-end fine chemical development.On this basis,a morphology-based caking evaluation model is developed with 74%and 96%time savings compared to previous modeling and non-modeling experiments,respectively,while guaranteeing superior accuracy.The crystal morphology is expressed as a function of the aspect ratio and the particle size distribution.The quantitative relationships between these parameters and the caking tendency are deduced,firstly achieving morphology anti-caking criterion establishment.For D-allulose crystals,considering humidity,and particle size,an aspect ratio is below 3 is the standard for combating caking,which has not been reported previously.Herein,the specific effect of crystal morphology on caking behavior is quantitatively described.The knowledge obtained can be applied to rapidly and quantitatively design anti-caking storage systems for products in warehouses. 展开更多
关键词 Caking evaluation Crystal morphology D-allulose Rod-like crystal Crystal bridge growth model
Thermal depolymerization of polyethylene terephthalate waste and its use in coal-blending coking 认领 引用 被引量：1
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作者 FANG Shixian SONG Huan +1 位作者 LIU Xiangchun CUI Ping 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2025年第4期602-612,共11页
This work proposed a strategy to improve the caking index of polyethylene terephthalate(PET)waste,in which low-temperature pyrolysis treatment(LTPT)was used to depolymerize PET waste.The mechanism of G modification wa... This work proposed a strategy to improve the caking index of polyethylene terephthalate(PET)waste,in which low-temperature pyrolysis treatment(LTPT)was used to depolymerize PET waste.The mechanism of G modification was revealed combining thermogravimetric(TG)analysis,Fourier transform infrared spectroscopy,pyrolysis-gas chromatography with mass spectrometric detection,and solid-state 13C nuclear magnetic resonance spectroscopy.Furthermore,crucible coking experiments were also conducted using industrial coal mixture and treated PET with the optimum G(PET300)or raw PET to evaluate the applicability of PET waste in coal-blending coking.According to characterization results of coke reactivity(CR),coke strength after reaction(CSR)indices,TG-related curves,pore volumes,and Raman spectra of the resultant cokes,LTPT could greatly increase the G of PET,and the optimum temperature was 300℃.Specifically,compared with the coke obtained from the blend with PET,the CR of the coke produced from the blend with PET300 decreased by 4.9%,whereas the CSR of the increased by 7.4%,suggesting that LTPT could increase the proportion of PET used for coal-blending coking.The improvement in G is attributed to the changes in C-O/C=O ratio,aliphatic H and aromaticity caused by LTPT. 展开更多
关键词 polyethylene terephthalate pyrolysis caking index coking property
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Photofermentative production of poly-β-hydroxybutyrate(PHB)by purple non-sulfur bacteria using olive oil by-products 认领 引用 被引量：1
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作者 Gianmarco Mugnai Luca Bernabò +2 位作者 Giulia Daly Elisa Corneli Alessandra Adessi 《Bioresources and Bioprocessing》 SCIE EI CSCD 2025年第1期394-408,共15页
This study evaluated the ability of six purple non-sulfur bacteria(PNSB)to convert olive oil by-products into poly-β-hydroxybutyrate(PHB).Strains were first independently cultivated in synthetic media with different ... This study evaluated the ability of six purple non-sulfur bacteria(PNSB)to convert olive oil by-products into poly-β-hydroxybutyrate(PHB).Strains were first independently cultivated in synthetic media with different carbon sources(acetic,lactic and malic acid)to assess their physiology and PHB production.Subsequently,their growth and PHB production using ingested pâtéolive cake(IPOC)as a substrate were investigated.Transmission electron microscopy(TEM)observations were conducted on strains cultivated on IPOC to investigate their cell morphologies and inclusion bodies presence and size.Rhodopseudomonas palustris strains accumulated up to 6.8%w PHB/w cells with acetate and 0.86%w PHB/w cells with a daily productivity of 0.54 mg PHB L-1 culture d-1 on IPOC.In contrast,Cereibacter johrii and Cereibacter sphaeroides reached 58.64%w PHB/w cells and 65.45%w PHB/w cells with acetate,respectively,while C.sphaeroides achieved 21.48%w PHB/w cells and a daily productivity of 10.85 mg PHB L-1 culture d-1 when cultivated on IPOC.All strains exhibited growth and PHB accumulation in both synthetic media and IPOC substrate.Specifically,R.palustris strains 42OL,AV33 and CGA009 displayed growth capability in all substrates,while C.johrii strains 9Cis and PISA 7,and C.sphaeroides F17 showed promising PHB synthesis capabilities.TEM observa-tions revealed that R.palustris strains,with smaller cell and inclusion body sizes,exhibited lower PHB accumulations,while C.johrii and C.sphaeroides strains,characterized by larger cells and inclusion bodies,demonstrated higher PHB production,recognizing them as promising candidates for PHB production using olive oil by-products.Further investigations under laboratory-scale conditions will be necessary to optimize operating parameters and develop integrated strategies for simultaneous PHB synthesis and the co-production of value-added products,thereby enhancing the economic feasibility of the process within a biorefinery framework. 展开更多
关键词 Rhodopseudomonas palustris Cereibacter sphaeroides Cereibacter johrii Ingested pâtéolive cake(IPOC) Biopolymers Resource recovery
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Effects of compound microbial agents and cellulase on the fermentation quality and nutritional characteristics of Camellia oleifera cake 认领 引用
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作者 Zhenxia Xu Yi Zhang +4 位作者 Yi Zhong Weijuan Su Minghao Liu Xia Xiang Yangmin Gong 《Oil Crop Science》 CAS CSCD 2025年第4期286-293,共8页
Camellia oleifera cake(COC), a nutrient-rich by-product of tea oil extraction, holds promise as a high-quality protein source but is limited in feed applications due to anti-nutritional factors, mainly tea saponins an... Camellia oleifera cake(COC), a nutrient-rich by-product of tea oil extraction, holds promise as a high-quality protein source but is limited in feed applications due to anti-nutritional factors, mainly tea saponins and crude fiber. This study employed solid-state fermentation using a compound microbial agent combined with cellulase to enhance COC's palatability and nutritional value. Single-strain fermentation identified Lactiplantibacillus plantarum as most effective in degrading tea saponins(46.0%) without reducing crude fiber. Optimal conditions were 0.1% inoculum, 48 h at 37 ℃, with 20% sugar. For cellulase hydrolysis, the best parameters were: 50 U/g enzyme, 50 ℃, 8 h, using 40-mesh sieved substrate. Combined fermentation began with enzymatic treatment followed by inoculation with a 1: 1: 1: 1: 1: 1 mixture of Saccharomyces cerevisiae(two strains), Lactiplantibacillus plantarum, Bacillus subtilis, Bacillus coagulans, and Lactobacillus acidophilus. The optimized conditions(0.1% inoculum, 7 days, 37 ℃, 20% sugar, 50% moisture) significantly reduced anti-nutritional components and improved protein content, indicating the potential of fermented COC as a viable feed ingredient. 展开更多
关键词 Camellia oleifera cake Fermentation Compound microbial agents Tea saponin Crude fiber
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A temperature-sensitive acidic completion fluid technology 认领 引用
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作者 LI Baojun LUO Pingya +7 位作者 HUANG Danchao ZHAO Xiangyang HU Heng DONG Hongwei SU Huan CHEN Shilin MAO Yuqing ROMERO CORTEZ Henry Paul 《Petroleum Exploration and Development》 SCIE 2025年第6期1624-1635,共12页
A temperature-sensitive mud cake remover(G315)was developed using ethyl lactate as the primary component.Based on this,a temperature-sensitive acidic completion fluid(CF-G315)was formulated.Core evaluation tests,mud c... A temperature-sensitive mud cake remover(G315)was developed using ethyl lactate as the primary component.Based on this,a temperature-sensitive acidic completion fluid(CF-G315)was formulated.Core evaluation tests,mud cake dissolution tests and corrosion tests were conducted to analyze the mud cake removal performance of G315,the removal efficiency of CF-G315,and its ability to modify the near-wellbore reservoirs,corrosion to casing and hydrolysis performance.Results indicate that ethyl lactate in G315 exhibits weak acidity at room temperature and decomposes into lactic acid under high temperatures.The lactic acid reacts with the calcium carbonate in the mud cake,generating bubbles that dislodge the mud cake and form soluble salts that are subsequently removed by fluid flow,thereby ensuring effective mud cake clearance.CF-G315 removes mud cake efficiently and enhances near-wellbore reservoir permeability.It demonstrates low corrosivity and environmental compatibility,contributing to equipment safety,simplified operational procedures and reduced operational risks.CF-G315 is promising for application in scenarios such as horizontal wells,open-hole completions and gravel pack completions. 展开更多
关键词 temperature-sensitivity mud cake remover acidic completion fluid ethyl lactate mud cake removal performance reservoir damage corrosiveness
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Rapeseed cake meal extract as an eco-friendly green sustainable inhibitor for the corrosion of cold rolled steel in trichloroacetic acid solution 认领 引用 被引量：1
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作者 Qian Shi Shuduan Deng +3 位作者 Baomin Fan Dake Xu Juan Xu Xianghong Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第15期71-87,共17页
The inhibitory properties of rapeseed cake meal extract(RCME)on the corrosion of cold rolled steel(CRS)in trichloroacetic acid(TCA)were systematically investigated using gravimetric,electrochemical,surface characteriz... The inhibitory properties of rapeseed cake meal extract(RCME)on the corrosion of cold rolled steel(CRS)in trichloroacetic acid(TCA)were systematically investigated using gravimetric,electrochemical,surface characterizations and theoretical calculations.The results demonstrate that RCME exhibits excellent inhibitory performance with a maximum inhibition efficiency of 92.7%for 100 mg L−1 RCME at 20℃.The adsorption of RCME obeys Langmuir isotherm at 20 and 30℃,Temkin isotherm at 40℃,and Freundlich isotherm at 50℃.RCME acts as a cathodic inhibitor.The charge transfer resistance is increased with the addition of RCME,while the double-layer capacitance decreases.SEM,AFM,CLSM,XPS,XRD and TOF-SIMS analyses confirm that the active components in RCME adsorb onto the surface of CRS,forming a protective film that effectively inhibits the corrosion of CRS by TCA.Along with the increase in the concentration of RCME,the surface tension of the inhibited solution gradually decreases,while the electrical conductivity increases before stabilizing.HPLC-MS and FTIR analyses reveal rutin,linolenic acid,linoleic acid and adenine are the effective substances in RCME.Quantum chemical(QC)calculations and molecular dynamic(MD)simulations indicate that the active centers of the effective inhibitor molecules are predominantly located on benzene rings,O-or N-containing heterocyclic rings,and functional groups such as C=O and C=C.Additionally,their main chains adsorb onto the Fe(001)surface in an approximately flat manner,involving both chemical and physical adsorption processes. 展开更多
关键词 Rapeseed cake meal extract Steel Trichloroacetic acid Adsorption Corrosion inhibition
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