期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到30篇文章
< 1 2 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Insight into the ammonia torrefaction and pyrolysis system of cellulose:Unraveling the evolution of chemical structure and nitrogen migration mechanism 认领 引用 被引量：1
1
作者 Shanjian Liu An Zhao +3 位作者 Jia Liu Mengqian Yin Fupeng Huang Dongmei Bi 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第3期135-147,I0005,共13页
This study aimed to investigate the mechanism of nitrogen doping,migration,and conversion during ammonia torrefaction and also explore the evolution law of the chemical structure of cellulose.The results showed that t... This study aimed to investigate the mechanism of nitrogen doping,migration,and conversion during ammonia torrefaction and also explore the evolution law of the chemical structure of cellulose.The results showed that the ammonia torrefaction pretreatment could significantly optimize the distribution of nitrogen and oxygen elements in cellulose.The carbon skeleton first captured the active nitrogenous radicals to form-NHn-N,and pyridine-N and pyrrole-N originated from the conversion of-NHn-N.The existence of C=O played a major role in the immobilization of nitrogen.The nitrogen in bio-oil exists mainly in the form of five-and six-membered heterocycles.The correlation analysis showed that the main precursors for the formation of nitrogenous heterocyclic compounds were five-membered Oheterocyclic compounds.Finally,the product distribution characteristics in the torrefaction-pyrolysis systems were summarized,and the nitrogen doping and conversion mechanisms were proposed.This study expanded the boundaries of cellulose pretreatment and the production of high-value chemicals. 展开更多
关键词 Ammonia torrefaction Cellulose Nitrogenous compounds Structure evolution Nitrogen migration
暂未订购 下载PDF
Recent Advance on Torrefaction Valorization and Application of Biochar from Agricultural Waste for Soil Remediation 认领 引用 被引量：1
2
作者 Kai Su Qirui Qin +2 位作者 Jingyu Yang Linxiao Li Shaoqi Deng 《Journal of Renewable Materials》 EI CAS 2022年第2期247-261,共15页
With the increase of global proportion of soil pollution and the number of areas at risk,researchers have sought to develop various pathways to repair or relieve the pollutants in soil.Among them,biochar represents on... With the increase of global proportion of soil pollution and the number of areas at risk,researchers have sought to develop various pathways to repair or relieve the pollutants in soil.Among them,biochar represents one multi-dimensional soil amendment which has got great deal of attention on its physicochemical properties towards the removal or mitigation of contaminants in soil.A variety of agricultural wastes like straw and manure prepared from different torrefaction process have been employed as feedstock for the production of biochar,which can be applied to the contaminated soil to facilitate the growing environment for crops,and to improve soil fertility and microbial environment.In addition,the utilization of biochar for soil remediation is also considered as a pro-cess of carbon sequestration.The purpose of this review is to summarize the latest research progress in torrefac-tion processes and mechanism of agricultural waste,the effects of different torrefaction methods on the formation and properties of biochar were explained,coupled with the effects of process parameters.Especially,the conver-sion and mechanisms of biochar prepared from agricultural wastes composed mainly with lignocellulosic material were discussed,and the characteristics of biochar prepared for improving soil physical and chemical character-istics,microbial community characteristics,nutrients,and the stability and relief of soil pollutants,especially heavy metals,are compared.Finally,this work discussed the application and future technical challenges of soil remediation based on agricultural waste derived biochar. 展开更多
关键词 Torrefaction biochar soil remediation agricultural waste
暂未订购 下载PDF
Impacts of Torrefaction on PM10 Emissions from Biomass Combustion 认领 引用
3
作者 Zihao Wang Dunxi Yu +1 位作者 Jingkun Han Jianqun Wu 《Energy Engineering》 EI 2021年第5期1267-1276,共10页
Typical biomass torrefaction is a mild pyrolysis process under conditions of ordinary pressure,low temperature(200–300°C)and inert atmosphere.Torrefaction is considered to be a competitive technology for biomass... Typical biomass torrefaction is a mild pyrolysis process under conditions of ordinary pressure,low temperature(200–300°C)and inert atmosphere.Torrefaction is considered to be a competitive technology for biomass pretreatment,but its impacts on the emissions of particulate matter from biomass combustion are worthy of further study.In this paper,three kinds of biomass,i.e.,bagasse,wheat straw and sawdust were selected for torrefaction pretreatment and the impacts of torrefaction on the emission characteristics of PM10 from biomass combustion were investigated.The combustion experiments were carried out on a drop tube furnace.The combustion-generated particulate and bulk ash samples were collected and subjected to analyses by various techniques.The results show that torrefaction tends to result in a reduction of PM1(particulates with an aerodynamic diameter less than 1μm)emissions from combustion,but the extent of reduction is dependent on biomass type.The reduction of PM1 from the combustion of torrefied biomass is mainly because that the torrefaction process removes some Cl and S from the biomass,thereby suppressing the release of alkali metals and the emissions of PM1 during the combustion process.As for PM1–10(particulates with an aerodynamic diameter within 1–10μm),its emissions from combustion of torrefied biomasses are consistently reduced,compared with their untreated counterparts.This observation is primarily accounted for the enhanced particle coalescence/agglomeration in combustion of torrefied biomasses,which reduces the emissions of PM1–10. 展开更多
关键词 Biomass combustion torrefaction particulate matter
暂未订购 下载PDF
An overview of torrefied bioresource briquettes:quality-influencing parameters,enhancement through torrefaction and applications 认领 引用 被引量：2
4
作者 M.A.Waheed O.A.Akogun C.C.Enweremadu 《Bioresources and Bioprocessing》 SCIE 2022年第1期122-139,共18页
In recent years,the need for clean,viable and sustainable source of alternative fuel is on the rampage in the global space due to the challenges posed by human factors including fossil induced emissions,fuel shortage ... In recent years,the need for clean,viable and sustainable source of alternative fuel is on the rampage in the global space due to the challenges posed by human factors including fossil induced emissions,fuel shortage and its everrising prices.These challenges are the major reason to utilize alternative source of energy such as lignocellulosic biomass as domestic and industrial feedstock.However,biomass in their raw form is problematic for application,hence,a dire need for torrefaction pre-treatment is required.The torrefaction option could ameliorate biomass limitations such as low heating value,high volatile matter,low bulk density,hygroscopic and combustion behaviour,low energy density and its fibrous nature.The torrefied product in powder form could cause air pollution and make utilization,handling,transportation,and storage challenging,hence,densification into product of higher density briquettes.This paper therefore provides an overview on the performance of torrefied briquettes from agricultural wastes.The review discusses biomass and their constituents,torrefaction pre-treatment,briquetting of torrefied biomass,the parameters influencing the quality,behaviour and applications of torrefied briquettes,and way forward in the briquetting sector in the developing world. 展开更多
关键词 Biomass energy value Bioresource briquette qualities Torrefaction pre-treatment Briquette quality parameters
暂未订购 下载PDF
Effects of Microwave Torrefaction with Mg(OH)2 on Characteristics of Bio-oil from Co-pyrolysis of Straw Stalk and Soapstock 认领 引用 被引量：1
5
作者 Wen Pingwei Zhou Yue +3 位作者 Dai Leilei Wang Yunpu Liu Yuhuan Ruan Roger 《China Petroleum Processing & Petrochemical Technology》 CAS 2019年第3期10-16,共7页
This study investigated the effects of torrefaction with Mg(OH)2 on the properties of bio-oil formed from the microwave-assisted catalytic fast co-pyrolysis of straw stalk and soapstock.The effects of torrefaction tem... This study investigated the effects of torrefaction with Mg(OH)2 on the properties of bio-oil formed from the microwave-assisted catalytic fast co-pyrolysis of straw stalk and soapstock.The effects of torrefaction temperature and residence time on the yield and composition of bio-oil were discussed.Results showed that the torrefaction temperature and residence time remarkably influenced the yield and composition of bio-oil.With the increase in temperature and time,the bio-oil yield and the proportion of oxygen-containing compounds decreased,while the proportion of aromatic compounds increased.When the feedstocks were subject to torrefaction reaction for 20 min at 260°C,the proportion of oxygen-containing compounds decreased from 29.89%to 16.49%.Meanwhile,Mg(OH)2 could render the deoxidization function of torrefaction process increasingly noticeable.The proportion of the oxygen-containing compounds reached a minimum(14.41%),when the biomass-to-Mg(OH)2 ratio was 1:1. 展开更多
关键词 microwave torrefaction Mg(OH)2 straw stalk soapstock bio-oil
暂未订购 下载PDF
Fundamental Study on the Production of "Hyper Wood Pellet"——Effect of Torrefaction Condition on Grinding and Pelletizing Properties 认领 引用 被引量：1
6
作者 Takahiro Yoshida Tetsuya Sano +3 位作者 Takashi Nomura Hideki Gensai Hiroki Watada Seiji Ohara 《Journal of Energy and Power Engineering》 CAS 2013年第4期705-710,共6页
In order to upgrade the conventional wood pellet, Japanese softwood and hardwood chips were torrefied at around 200-350℃, and pelletized. The characteristics of the torrefied material/pellets such as their calorific ... In order to upgrade the conventional wood pellet, Japanese softwood and hardwood chips were torrefied at around 200-350℃, and pelletized. The characteristics of the torrefied material/pellets such as their calorific value, grinding energy, pelletizing energy and elemental composition, were also evaluated in this study. The calorific value rose with increasing torrefaction temperature and exceeded 25 MJ/kg （an increase of nearly 40% compared to the untreated state） for torrefaction at around 350℃. The grinding energy greatly decreased with increasing torrefaction temperature, and the reduction was larger for Japanese oak hardwood chips. The pelletization energy for the torrefied material tended to be slightly smaller than in the untreated case. People named such torrefied pellet as ＂hyper wood pellet＂. 展开更多
关键词 Wood pellets torrefaction calorific value.
暂未订购 下载PDF
Upgraded Pellet Making by Torrefaction—Torrefaction of Japanese Wood Pellets 认领 引用 被引量：1
7
作者 Takahiro Yoshida Takashi Nomura +3 位作者 Hideki Gensai Hiroki Watada Tetsuya Sano Seiji Ohara 《Journal of Sustainable Bioenergy Systems》 2015年第3期82-88,共7页
Upgraded wood pellets were produced and evaluated by torrefaction of wood pellets. In this study, conventional wood pellets were initially prepared and subsequently torrefied on a laboratory and then larger scale. Dur... Upgraded wood pellets were produced and evaluated by torrefaction of wood pellets. In this study, conventional wood pellets were initially prepared and subsequently torrefied on a laboratory and then larger scale. During the laboratory scale production, pellets from wooden parts of Japanese cedar (sugi, Cryptomeria japonica) and Japanese oak (konara, Quercus serrata) trees were heat- treated in an inert gas oven under nitrogen atmosphere around 170&deg;C - 320&deg;C. For the Japanese cedar, the calorific values were improved by heat treatment up to 260&deg;C. By heat treatment at 240&deg;C, the upgrade ratio of higher heating value (HHV) was nearly 30% and the energy yield was 97%. For the Japanese oak, the calorific values were improved by heat treatment up to 320&deg;C. By heat treatment at 280&deg;C, the upgrade ratio of HHV exceeded 30% and the energy yield was 84%. On a larger scale, a conventional charcoal oven was modified for torrefied wood pellet production, meaning that torrefied wood pellet with 25 MJ/kg of calorific value was produced during heat treatment at 350&deg;C. A mixture of conventional and torrefied pellets was applied to a commercial pellet stove, and torrefied wood pellets produced in this study might be usable as fuel for conventional pellet stoves. 展开更多
关键词 Component Wood Pellet Torrefaction Calorific Value
暂未订购 下载PDF
Design and Testing of a Solar Torrefaction Unit to Produce Charcoal 认领 引用
8
作者 Rajaram Swaminathan Frans Nelongo Pandeni Nandjembo 《Journal of Sustainable Bioenergy Systems》 2016年第3期66-71,共6页
With increasing crude oil prices, fuels like kerosene and cooking gas have become unaffordable for many ordinary people in developing countries. For millions of Africans who need heat energy to cook their food, biomas... With increasing crude oil prices, fuels like kerosene and cooking gas have become unaffordable for many ordinary people in developing countries. For millions of Africans who need heat energy to cook their food, biomass like wood remains the easiest and cheapest source of fuel. Charcoal remains the most popular choice compared to wood since it can cook food much faster with very little smoke. Torrefaction of biomass is a mild form of pyrolysis at temperatures typically between 200℃ and 300℃ to produce charcoal. Torrefaction changes biomass properties to provide a much better fuel quality for combustion applications. A simple parabolic trough solar collector to produce charcoal by torrefaction process using solar energy has been designed from first principles. The device was fabricated and various locally available wood species were tested. The yield was found to be 21% to 35% with a production time of 90 minutes. The paper details the design procedure and the test results. 展开更多
关键词 Torrefaction Charcoal Production Solar Parabolic Trough Design Testing
暂未订购 下载PDF
Torrefaction of agricultural crop residues in a continuous screw-auger-type reactor:evaluation of solid-fuel characteristics and economic feasibility 认领 引用
9
作者 Mallamolla Pradeep Narayan Lal Panwar 《Clean Energy》 EI CSCD 2026年第1期106-117,共12页
Torrefaction is mild thermochemical pretreatment technology that enhances biomass by changing its physico-chemical characteristics to produce a high-quality solid biofuel.The present study evaluated the performance of... Torrefaction is mild thermochemical pretreatment technology that enhances biomass by changing its physico-chemical characteristics to produce a high-quality solid biofuel.The present study evaluated the performance of a continuous screw-auger-type torrefaction system for upgrading agricultural residues rice husk(RH)and wheat straw(WS)into energy-dense,hydrophobic biomass suitable for cofiring applications.Torrefaction experiments were conducted at three temperatures of 250℃,275℃,and 300℃ with a total residence time of 12 minutes.The results revealed that the mass yield decreased with temperature,from 85.60%to 75.00%and from 83.20%to 70.80%for RH and WS,respectively.Higher heating values increased significantly with torrefaction severity,reaching 19.26 MJ/kg for RH and 20.25 MJ/kg for WS when torrefied at 300℃,representing a 22%-25%improvement over raw biomass.Moisture uptake dropped substantially from 38.6%to 1.9%and from 41.5%to 2.1%for RH and WS,respectively,indicating the enhanced hydrophobicity.Combustion indices have also showed desirable trends;the fuel ratio increased to 0.54 and 0.57,and the volatile ignitability exceeded 15 MJ/kg for both biomass samples torrefied at 300℃,indicating improved ignition characteristics suitable for cofiring.Techno-economic analysis revealed a net profit of 138520 Indian rupees/year,with a payback period of 5 years and a benefit-cost ratio of 1.27,supporting the economic feasibility of the system.Overall,the study confirms that torrefied biomass presents improved fuel characteristics and combustion behaviour,making it a viable solution for clean-energy transition and sustainable waste management. 展开更多
关键词 enhances biomass mild thermochemical pretreatment technology continuous screw auger type reactor economic feasibility torrefaction agricultural crop residues solid fuel characteristics cofiring applicationstorrefaction
暂未订购 下载PDF
Enhancing compatibility and biodegradability of polylactic acid/biomass composites through torrefaction of forest residue 认领 引用 被引量：1
10
作者 June-Ho Choi Myeong Rok Ahn +10 位作者 Chae-Hwi Yoon Yeon-Su Lim Jong Ryeol Kim Hyolin Seong Chan-Duck Jung Sang-Mook You Jonghwa Kim Younghoon Kim Hyun Gil Cha Jae-Won Lee Hoyong Kim 《Journal of Bioresources and Bioproducts》 SCIE EI CSCD 2025年第1期51-61,共11页
This study investigated the effects of torrefaction on forest residue(FR)and its subsequent ap-plication as a bulk-loading filler in polylactic acid(PLA)composites.Torrefaction enhanced the chemical properties of FR,i... This study investigated the effects of torrefaction on forest residue(FR)and its subsequent ap-plication as a bulk-loading filler in polylactic acid(PLA)composites.Torrefaction enhanced the chemical properties of FR,improving its compatibility with PLA,and the crystallinity increased from 24.9%to 42.5%.The process also improved the hydrophobicity of PLA/biomass composites,as demonstrated by the water contact angle of 76.1°,closely matching that of neat PLA(76.4°).With the introduction of 20%modified biomass properties after torrefaction treatment,the tensile strength of PLA/biomass composite increased from 58.7 to 62.3 MPa.Additionally,the addition of torrefied forest residue(TFR)accelerated biodegradation by increasing the onset of degrada-tion and inhibiting crystallization.After 90 d,the biodegradability of PLA/biomass composites reached 94.9%,which had a 6.9%increase compared to the neat PLA(88.8%).Overall,this study highlights the potential of torrefaction in enhancing both the physical properties and biodegrad-ability of PLA-based composites,contributing to a more sustainable approach to reducing plastic pollution. 展开更多
关键词 Forest residue Torrefaction Bulk-loading filler Polylactic acid composite Hydrophobicity Tensile strength Biodegradability
Hydrophobicity and performance analysis of beverage and agricultural waste torrefaction for high-grade bio-circular solid fuel 认领 引用 被引量：1
11
作者 Napat Kaewtrakulchai Sutthipoj Wongrerkdee +3 位作者 Benjapon Chalermsinsuwan Namfon Samsalee Chao-Wei Huang Kanit Manatura 《Carbon Resources Conversion》 EI CSCD 2025年第1期165-172,共8页
Torrefaction is recognized as a high-performance technology for converting raw biomass into high-grade solid biofuel.In this study,hydrophobic and ANOVA analyses were employed to investigate torrefied brewery waste,pa... Torrefaction is recognized as a high-performance technology for converting raw biomass into high-grade solid biofuel.In this study,hydrophobic and ANOVA analyses were employed to investigate torrefied brewery waste,palm kernel shell,and water hyacinth residue.Herein,the torrefaction experiments were conducted at four temperatures(180,230,280,and 330℃)for a residence time of 30 min.The biomass type and temperature were crucial in determining the optimum conditions for three response parameters:energy yield(EY),specific energy consumption(SEC),and hygroscopic reduction equilibrium(HRE).Hydrophobicity was assessed by measuring the contact angle(CA),and equilibrium moisture content(EMC)to represent hygroscopic behavior.The ANOVA results indicated that temperature had the most significant impact on the response parameters.Optimal torrefaction of brewery waste at 180℃yielded an EY of 82.05%,SEC of 81.88 kWh/kg,and HRE of 23.2%.These findings highlight the advantages of biomass-derived torrefaction products in waste utilization,transport,and storage of biomass-derived torrefaction products.Furthermore,this study demonstrates an efficient method for enhancing the fuel quality of biomass,contributing significantly to the bio-circular green economy concept. 展开更多
关键词 Torrefaction Hydrophobicity Brewery waste Optimization ANOVA Biochar
Parametric study on mechanical-press torrefaction of palm oil empty fruit bunch for production of biochar 认领 引用
12
作者 Napat Kaewtrakulchai Awat Wisetsai +6 位作者 Monrudee Phongaksorn Chakkrit Thipydet Bunjerd Jongsomjit Navadol Laosiripojana Nakorn Worasuwannarak Jindarat Pimsamarn Supachai Jadsadajerm 《Carbon Resources Conversion》 EI CSCD 2025年第3期113-123,共11页
This study investigated the impact of varying temperatures and pressures during torrefaction under mechanical compression on the mass yield and chemical properties of torrefied empty fruit bunch(MTEFB).It also examine... This study investigated the impact of varying temperatures and pressures during torrefaction under mechanical compression on the mass yield and chemical properties of torrefied empty fruit bunch(MTEFB).It also examined how these factors influenced the biochar derived from MTEFB.Experiments were conducted at temperatures ranging from 240℃ to 300℃ and mechanical pressures of 25,50,and 75 MPa.The results indicated that at all temperatures above 280◦C,mass yields were significantly reduced,and higher mechanical pressures further accelerated thermal degradation.FTIR analysis revealed structural modifications,including dehydration,decarboxylation,and demethylation,particularly at elevated pressures.Elemental analysis showed an increase in carbon content to 55.68% when MTEFB was prepared at 300℃ and 75 MPa.The HHV reached 23.11 MJ/kg,indicating improved energy yield.The proximate analysis demonstrated an increase in fixed carbon to 26.32%,highlighting the influence of temperature and pressure on biochar characteristics.Further carbonization at 600℃ of MTEFB,which was prepared under mechanical-press torrefaction conditions at 300℃ with 75 MPa,produced biochar with enhanced yield and a more graphitic structure.The combination of mechanical-press torrefaction and subsequent carbonization presented a promising pathway for producing high-quality biochar and other solid carbon materials. 展开更多
关键词 Oil palm empty fruit bunch Torrefaction Mechanical Pressure Pyrolysis Biochar
Wet torrefaction of Indonesian agricultural waste biomass:product evaluation and analysis of slaggingfouling potential 认领 引用
13
作者 Muhammad A.A.Efendi Toto Hardianto Pandji Prawisudha 《Clean Energy》 EI CSCD 2025年第3期1-10,共10页
The agricultural waste biomass holds potential as a valuable resource,capable of being converted into high-grade solid fuel for energy production.Despite the ample availability of rice straw and palm oil empty fruit b... The agricultural waste biomass holds potential as a valuable resource,capable of being converted into high-grade solid fuel for energy production.Despite the ample availability of rice straw and palm oil empty fruit bunch stock,challenges persist with biomass feedstock,such as low calorific values and high slagging-fouling potency.The wet torrefaction process,known as hydrothermal torrefaction,enhances agricultural waste biomass into solid fuel comparable to lignite and sub-bituminous coal.The study investigates the slagging-fouling potential of raw agriculture biomass waste and wet torrefaction-treated variants,evaluating sample characteristics through proximate,ultimate,and calorific value analyses.This study also investigates the potential of the wet torrefaction process as a pre-treatment in multi-process conversion.The moisture content of the wet torrefaction biomass decreased slightly,and the calorific value of the wet torrefaction biomass samples was higher than that of the raw biomass.The result of rice straw wet torrefaction at 240℃was a gross calorific value of 16.29 MJ/kg,equivalent to lignite A,with slagging potential decreased from 0.021(low)to 0.011(low),and the fouling potential from 0.921(medium)to 0.322(low).The result of palm oil empty fruit bunches,wet torrefaction at 240℃achieved the highest gross calorific value of 20.38 MJ/kg,equivalent to sub-bituminous C coal,with slagging potential reduced from 0.076(low)to 0.031(low)and fouling potential reduced from 74.84(high)to 20.27(medium).Wet torrefaction shows potential as a pre-treatment for multi-process conversion.Future studies should consider sequential torrefaction(wet and dry methods)that could leverage the advantages of each,reducing slagging and fouling potential while increasing the calorific value. 展开更多
关键词 biomass wet torrefaction hydrothermal multi-process
暂未订购 下载PDF
Towards Carbon-Neutral Ironmaking:Stepwise Integration of Biocarbon in PCI with Combustion Behavior Characterization and Injection Limit Evaluation 认领 引用
14
作者 Min-Woo Kim Min-Jong Ku +3 位作者 Jongho Kim Gyoung-Min Kim Chung-Hwan Jeon Dae-Gyun Lee 《Engineering》 SCIE EI CSCD 2026年第4期215-228,共14页
As the steel industry is intended to be carbon-neutral,transitional solutions are required before full-scale hydrogen-based reduction becomes viable.One such strategy is the partial replacement of pulverized coal inje... As the steel industry is intended to be carbon-neutral,transitional solutions are required before full-scale hydrogen-based reduction becomes viable.One such strategy is the partial replacement of pulverized coal injection(PCI)with high-quality biocarbon in blast furnace(BF)operations.Raw biomass presents challenges,such as low grindability,high ash content,and low energy density,which can be mitigated through torrefaction and carbonization.This study evaluates the combustion behavior and injection limits of four biocarbon samples(mildly torrefied biomass(MTB),hard torrefied biomass(HTB),mildly carbonized biomass(MCB),and hard carbonized biomass(HCB))using thermogravimetric analysis(TGA),drop tube furnace(DTF),and laminar flow reactor(LFR)experiments.Results show that as biomass is carbonized,its combustion kinetics increasingly resemble those of PCI coal.Co-firing tests confirmed improved performance at higher blending ratios,especially with highly treated samples,such as HCB,due to enhanced fragmentation and char reactivity.Injection limits were determined based on combustion performance,heating value(±5 wt%of PCI coal),and ash content(<10 wt%).The MTB and HCB exceeded these limits at approximately 27-30 wt%blending,indicating the need for an adjusted fuel input.Overall,biocarbon shows strong potential as a PCI substitute,offering a feasible low-carbon pathway for existing BF systems. 展开更多
关键词 Blast furnace Biomass Maximum injection limit Torrefaction Biochar
暂未订购 下载PDF
Biomass torrefaction in a slot-rectangular spouted bed reactor 认领 引用 被引量：2
15
作者 Ziliang Wang C. Jim Lim John R. Grace 《Particuology》 SCIE EI CAS CSCD 2019年第1期154-162,共9页
Sawdust was subjected to torrefaction in a "semi-batch" slot-rectangular spouted bed (SRSB) reactor at temperatures from 240 to 330℃ and biomass feed rates from 220 to 710g/h.Stable spouting of the sawdust ... Sawdust was subjected to torrefaction in a "semi-batch" slot-rectangular spouted bed (SRSB) reactor at temperatures from 240 to 330℃ and biomass feed rates from 220 to 710g/h.Stable spouting of the sawdust was achieved in the slot-rectangular spouted bed,although the pressure drop across the reactor was observed to oscillate.Compared to the biomass feed rate,the temperature had a greater effect on the biomass weight loss and energy yield.Increases in temperature were found to promote weight loss of the sawdust while decreasing the energy yield.The main solid product was the torrefied sawdust,which remained in the SRSB reactor and was captured by a cyclone.The ratio of the torrefied biomass removed by the cyclone to the total torrefied biomass increased along with both the feed rate and temperature.After undergoing torrefaction,6.7%-39.2% of the original sawdust mass was lost while 67.4%-98.7% of its energy was retained.The torrefied sawdust had a higher carbon content but less oxygen,hydrogen and volatiles,along with a greater higher heating value and increased density compared to the raw sawdust.The size of the sawdust particles also decreased markedly during the torrefaction process. 展开更多
关键词 Torrefaction Slot-rectangular spouted bed reactor Temperature Biomass feed rate Torrefied sawdust property
Influence of torrefaction pretreatment on biomass gasification technology 认领 引用 被引量：7
16
作者 CHEN Qing ZHOU JinSong +2 位作者 LIU BingJun MEI QinFeng LUO ZhongYang 《Chinese Science Bulletin》 2011年第14期1449-1456,共8页
Torrefaction is a slow pyrolysis process that is carried out in the relatively low temperature range of 220-300°C.The influence of torrefaction as a pretreatment on biomass gasification technology was investigate... Torrefaction is a slow pyrolysis process that is carried out in the relatively low temperature range of 220-300°C.The influence of torrefaction as a pretreatment on biomass gasification technology was investigated using a bench-scale torrefaction unit,a bench-scale laminar entrained-flow gasifier,and the analysis techniques TGA-FTIR and low temperature nitrogen adsorption.A series of experiments were performed to examine the characteristics of the torrefaction process,the properties of torrefaction products,and the effects of torrefaction on gas composition,cold gas efficiency and gasification efficiency.The results showed that during the torrefaction process the moisture content of biomass were reduced,and the wood fiber structure of the material was destroyed.This was beneficial to storage,transport and subsequent treatments of biomass in large scale.For solid products,torrefaction increased the energy density,decreased the oxygen/carbon ratio,and created a more complex pore structure.These improved the syngas quality and cold gas efficiency.Combustible gases accounted for about 50%of non-condensable gaseous torrefaction products.Effective use of the torrefaction gases can save energy and improve efficiency.Overall,biomass torrefaction technology has good application prospects in gasification processes. 展开更多
关键词 biomass torrefaction pretreatment gasification
Pretreatment of biomass by torrefaction 认领 引用 被引量：3
17
作者 WANG GuiJun LUO YongHao +2 位作者 DENG Jian KUANG JiangHong ZHANG YunLiang 《Chinese Science Bulletin》 2011年第14期1442-1448,共7页
Agricultural biomass has some drawbacks such as high moisture content,low energy density and wide distribution and as a result,the cost of transport and storage are high.Moreover,raw biomass has poor grindability so i... Agricultural biomass has some drawbacks such as high moisture content,low energy density and wide distribution and as a result,the cost of transport and storage are high.Moreover,raw biomass has poor grindability so its use in a pulverized boiler or entrained flow gasifier is difficult.Torrefaction is a mild pyrolysis process carried out at temperatures ranging from 200°C to 300°C to deal with these problems.The cotton stalk and wheat straw were torrefied in a fix-bed reactor at moderate temperatures(200°C,230°C,250°C,270°C and 300°C)under N 2 for 30min.The biomass chars after torrefaction had higher energy density and improved grindability characteristics compared with raw biomass and they also showed hydrophobic characteristics.The volatiles consist of a condensable fraction and a non-condensable fraction.The former mainly contained water and tar(organic products but mainly acetic acid).The non-condensable products are typically comprised of CO 2,CO and a small amount of CH 4 and even trace H 2.The volatiles increased with an increase in the torrefaction temperature but the solid yield and the energy yield decreased.However,the grindability and energy density of the biomass char showed great improvement.A kinetic study on the generation of the main non-condensable gases was undertaken and we conclude that the gases are formed by parallel independent first-order reactions.Characteristic kinetic parameters for the generation of each gas were determined. 展开更多
关键词 agricultural biomass torrefaction pretreatment grindability kinetics
Superhydrophobic and superlipophilic biochar produced from microalga torrefaction and modification for upgrading fuel properties 认领 引用
18
作者 Congyu Zhang Meng Wang +4 位作者 Wei-Hsin H.Chen Ying Zhang Anelie Pétrissans Mathieu Pétrissans Shih-Hsin H.Ho 《Biochar》 SCIE CAS CSCD 2023年第1期334-348,共15页
Torrefaction operation is an essential pathway for solid biofuel upgrading,and good hydrophobicity of torrefied biochar is conducive to its storage.Herein,a two-stage treatment of torrefaction followed by modification... Torrefaction operation is an essential pathway for solid biofuel upgrading,and good hydrophobicity of torrefied biochar is conducive to its storage.Herein,a two-stage treatment of torrefaction followed by modification by hexadecyltrimethoxysilane was adopted to improve the moisture resistance performance of biochar.This two-stage treatment process led to a longer torrefied microalgal biochar preservation time(60-200%improved)and great superhydrophobicity and superlipophilicity.Therefore,the modified microalgal biochar could significantly adsorb leaking oil for environmental remediation and further improve the calorific value of the biochar.The obtained results indicated that the oil adsorption capacity of modified microalgal biochar was correlated to torrefaction temperature and oil species.Specifically,the oil adsorption capacity was enhanced up to 70-80%from the modification process when comparing to raw microalga.Increasing the torrefaction temperature enhanced the adsorption quantity of the modified microalgal biochar.By adsorbing the oil,the calorific value of oilchar,namely,biochar with adsorbed oil,could be higher than 40 MJ kg−1.Furthermore,the pyrolysis and combustion characteristics suggested that biochar stability gradually rose as the torrefaction temperature increased.By comprehensively analyzing and comparing the fuel performance of the modified microalgal biochar with previous literature,the obtained modified microalgal biochar possessed better fuel properties and environmental sustainability. 展开更多
关键词 Microalga Torrefaction Biochar Superhydrophobicity Oil adsorption Fuel property
Microwave torrefaction of empty fruit bunch pellet:Simulation and validation of electric field and temperature distribution 认领 引用
19
作者 Peter Nai Yuh Yek Sieng Huat Kong +5 位作者 Ming Chiat Law Changlei Xia Rock Keey Liew Teck Sung Sie Jun Wei Lim Su Shiung Lam 《Journal of Bioresources and Bioproducts》 EI CSCD 2022年第4期270-277,共8页
Microwave simulation is significant in identifying a reactor design allowing the biomass to be heated and processed evenly.This study integrated the radio frequency and transient heat transfer modules to simulate the ... Microwave simulation is significant in identifying a reactor design allowing the biomass to be heated and processed evenly.This study integrated the radio frequency and transient heat transfer modules to simulate the microwave distribution and investigated the performance of microwave heating in the cavity.The simulation results were compared with the experimental findings us-ing the finite element analysis software of COMSOL MULTIPHYSICS to predict the temperature profile and electric field of microwave in the biomass(empty fruit bunch pellets).The higher temperature distribution was observed at the bottom and centre section of the empty fruit bunch pellet bed in the reactor,showing the uniqueness of microwave heating.According to the simula-tion results,the temperature profile obtained through the specific cavity geometry and dielectric properties agreed with the experimental temperature profile.The simulated temperature profile demonstrated a logarithmic increase of 120°C/min at the first 50 s followed by 50°C/min until 350 s.The experimental temperature profile showed three different heating rates before reaching 300°C,including 78.3°C/min(50-120°C),30.6°C/min(121-250°C),and 105°C/min(250-300°C).The results of this study might contribute to the improvement of microwave heating in biomass torrefaction. 展开更多
关键词 Microwave Torrefaction Simulation Energy Temperature
Effects of operating conditions and pre-densification on the torrefaction products of sorghum straw 认领 引用
20
作者 Xuanzuo Liu Zonglu Yao +3 位作者 Hongbin Cong Lixin Zhao Lili Huo Jinchun Song 《International Journal of Agricultural and Biological Engineering》 SCIE 2020年第4期219-225,共7页
The effects of operating conditions and pre-densification on the torrefaction performance parameters and the properties of the torrefied sorghum straw were studied.A full-factor experiment was performed on a fixed tub... The effects of operating conditions and pre-densification on the torrefaction performance parameters and the properties of the torrefied sorghum straw were studied.A full-factor experiment was performed on a fixed tube furnace,in which sorghum straw powder and pellets were heated to 230℃,260℃,280℃ and 300℃ at 2.5℃/min,5℃/min and 7.5℃/min,respectively.The pyrolysis characteristics of the sorghum straw torrefied under various operating conditions were complemented by thermogravimetric analysis.It was observed that the high temperature led to the high calorific value of the torrefied sorghum straw with an acceptable mass and energy yield.The sorghum straw torrefied at a temperature above 280℃ had a higher heating value(HHV)that was comparable to that of the low rank coal while maintaining its energy yield above 85%.The results suggested that temperature was an important factor determining the properties of the torrefied products,and the heating rate would affect the internal temperature of the torrefied biomass by affecting the heat transfer during the torrefaction.The energy densification index of the pellets decreased uniformly as the heating rate increased proportionally,indicating that pre-densification can be used as a potential method to solve the heat transfer delay in the fixed reactors at high heating rates,especially for high temperatures. 展开更多
关键词 torrefaction pre-densification pyrolysis characteristics operating condition sorghum straw heat transfer
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈