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The effect of hydrothermal pretreatment on the structure and fast pyrolysis behaviors of Sheng Li lignite

Chinese Journal of Chemical Engineering 2021年第7期34卷 265-274页

作者： Boyang Bai Luyao Qiang Suisui Zhang Zhiwei Peng Hang Mu Xiaoxun Ma School of Chemical Engineering Northwest University International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST)for Clean Utilization of Hydrocarbon Resources Chemical Engineering Research Center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern ShaanxiXi’an 710069China

The structure and composition of coal determine its fast pyrolysis characteristics,and the study of the relationship between them can play an important role in the efficient and clean utilization of ***,in this work,hydrothermal pretreatment was used to artificially change the structure and composition of Sheng Li(SL)lignite,which was used to investigate the influence of structural changes on *** physicochemical structure and composition of samples were characterized by X-ray diffraction,specific surface area and porosity analyzer,solid-state 13C nuclear magnetic resonance,Fourier transform infrared spectroscopy,and elemental *** experiments were carried out in a powderparticle fluidized bed reactor,and the distribution and composition of the pyrolysis products were *** gasification activity of char was investigated by thermogravimetric analysis with a CO_(2) *** results show that hydrothermal pretreatment(HTP)can destroy the cross-linking structure of SL lignite,and affect its aromaticity,pore structure,functional group,and carbon structure to change the distribution and composition of pyrolysis products of SL lignite,especially the composition of ***,the structure–activity relationship between the structure,composition,and pyrolysis characteristics of coal was comprehensively studied.

关键词： Hydrothermal pretreatment Lignite Physicochemical structure fast pyrolysis

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Correlation between solubility parameters and recovery of phenolic compounds from fast pyrolysis bio-oil by diesel extraction

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Carbon Resources Conversion 2018年第3期1卷 238-244页

作者： Hoyong Kim Nelson R.Vinueza Stephen S.Kelley Sunkyu Park Department of Forest Biomaterials North Carolina State UniversityRaleighNC 27695USA Center for Bio-based Chemistry Korea Research Institute of Chemical TechnologyDaejeon 34114Republic of Korea Department of Textile Engineering Chemistry and ScienceNorth Carolina State UniversityRaleighNC 27695USA

fast pyrolysis bio-oils(fpBO)were extracted with two alternative commercial transportation fuels,hydrocarbon diesel and *** extraction of fpBO with commercial diesel fuel provided a yield of 4.3 wt%,but the yield increased significantly to 26.6 wt%when bio-diesel was the *** molecular weight of fpBO before and after extraction were consistent with the loss of a more soluble,low molecular weight fraction from the crude *** relative energy difference(RED),based on the Hansen solubility parameter(HSP),is used to examine the extraction efficiency of specific compounds in the two different‘solvents’.Differences in the RED values could be used to rationalize differences in the partitioning of common fpBO phenolics.

关键词： fast pyrolysis Bio-oil Diesel extraction Hansel solubility parameter Relative energy difference

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Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis

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Carbon Resources Conversion 2021年第1期4卷 219-229页

作者： Lijuan Zhang Cheolyong Choi Hiroshi Machida Zhibao Huo Koyo Norinaga Department of Chemical Systems Engineering Graduate School of EngineeringNagoya UniversityAichi 464-8603Japan School of Environmental Science and Engineering Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China

The current state of lignin has been characterized by these three:(1)as one of the main components in lignocellulosic biomass with an abundant amount;(2)not be taken seriously but treated as a waste product;(3)underutilized due to a complex and stubborn ***,lignin can be a rich source for hydrocarbons and aromatic compounds when gives appropriate *** this work,we have studied the hydrotreatment of alkaline lignin(AL)under relatively mild conditions and further investigated the characterization of hydrogenated lignin(HL),especially the behavior during fast *** recovery of the HL decreased with increasing reaction temperature from 60 wt.%to 41 wt.%in the range of 150-250℃.The hydrotreated products were analyzed using Elemental Analysis,FTIR(for HL)and GC-MS(for bio-oil).The HL samples were found to have a higher hydrogen/carbon atomic effective ratio(H/C_(eff) ratio)and a higher degree of saturation than *** to the internal structure of the lignin before and after hydrotreatment,the side chain groups were removed from AL during the *** that,from the fast pyrolysis of HL,it was observed that more light hydrocarbons and aromatic compounds were formed than that of ***,fast pyrolysis in the hydrogen atmosphere revealed that more volatile fractions were released compared to the Helium *** total olefins yield was increased for HL compared AL from 1.02 wt.%to 3.1 wt.%at 250℃for 7 *** study of HL is instructive to some extent for the industrial utilization of lignin.

关键词： Alkaline lignin Hydrotreatment Hydrogenated lignin fast pyrolysis Hydrogen atmosphere

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Upgrading of biomass fast pyrolysis oil over a moving bed of coal char

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Carbon Resources Conversion 2020年第1期3卷 130-139页

作者： Junjie Zhang Guangyong Wang Shaoping Xu State Key Laboratory of Industrial Vent Gas Reuse National Center of C1 Chemical Engineering ResearchSouthwest institute of Chemical Co.Ltd.No.393 Jichang RoadChengdu 610225China State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyNo.2 Linggong RoadDalian 116024China

fast pyrolysis of sawdust(SD)and upgrading of the derived bio-oil*(water-free basis)over Shenmu bituminous coal char(SMC)were conducted in an integrated free fall pyrolyzer and moving bed upgrading *** water soluble and heavy bio-oil*(THF soluble)yields decrease and the content of light bio-oil*(CH_(2)Cl_(2) soluble)increases significantly compared that without SMC despite the decrease of light bio-oil**** analyses of the light bio-oil*were performed using GC-MS and ^(1)H NMR *** results show that during volatiles-char interaction,the SMC plays important roles in deoxygenation and *** role of SMC in the upgrading process was explored by BET,FT-IR and XRD *** porous structure provides reaction active sites for the bio-oil *** volatiles-char interaction,the specific surface area of SMC decreases significantly and the carbon crystallite size *** increasing the char updating rate from 1 g/min to 4 g/min,the relatively fresh SMC surface leads to the increased active sites,the conversion of heavy bio-oil*is slightly promoted and the removal effects of heteroatoms(O,N)compounds in the light bio-oil*are *** changes in SMC specific surface area and microcrystalline size are weakened accordingly.

关键词： Biomass fast pyrolysis Bio-oil upgrading Char Volatiles-char interaction

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In situ catalytic conversion of biomass fast pyrolysis vapors on HZSM–5

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Journal of Energy Chemistry 2016年第3期25卷 427-433页

作者： Yindi Zhang Ping Chen Hui Lou Institute of Catalysis Department of Chemistry Zhejiang University

In situ catalytic conversion of biomass fast pyrolysis vapors was carried out on HZSM-5 with varying Si/Al ratios(ranging from 20 to 300) at 450 °C. The effects of Si/Al ratios of HZSM-5 zeolites on the distribution of biomass fast pyrolysis products and carbon deposits on catalysts were investigated. It was quite remarkable that after in situ catalytic conversion the amount of light phenols and hydrocarbons increased significantly while that of heavy phenols decreased a lot. Besides, the yield of cyclopentenones with relatively low oxygen content generally increased. It also indicated that as the Si/Al ratios of HZSM-5 increased, the amount of hydrocarbons and light phenols was found to drop greatly. The amount of carbon deposits was found to be around 8.5% with the exception of HZSM-5 with the Si/Al ratio of 300,which is much lower. Moreover, the carbon deposits yield dropped gradually with increasing Si/Al ratios of *** of spent catalysts at 600 °C helped to restore the catalytic activity to a large extent despite a relatively lower efficiency of deoxygenation. Results indicated that HZSM-5 with relatively high acidity displayed great catalytic performance.

关键词： fast pyrolysis In situ catalytic conversion HZSM-5 Si/Al ratio Carbon deposits

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Properties of Bio-oil from fast pyrolysis of Rice Husk

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Chinese Journal of Chemical Engineering 2011年第1期19卷 116-121页

作者：郭秀娟王树荣王琦郭祚刚骆仲泱 State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

Physicochemical properties of bio-oil obtained from fast pyrolysis of rice husk were studied in the present *** distillation was used to separate the crude bio-oil into three fractions *** fraction,middle fraction and heavy *** chemical composition was analyzed by gas chromatograph and mass spectrometer（GC-MS）.The thermal behavior,including evaporation and decomposition,was investigated using thermogravimetric analyzer coupled with Fourier transform infrared spectrometer（TG-FTIR）.The product distribution was significantly affected by contents of cellulose,hemicellulose and *** bio-oil yield was 46.36%（by mass） and the yield of gaseous products was 27%（by mass）.The chemicals in the bio-oil included acids,aldehydes,ketones,alcohols,phenols,sugars,*** light fraction was mainly composed of acids and compounds with lower boiling point temperature,the middle and heavy fractions were consisted of phenols and *** thermal stability of the bio-oil was determined by the interactions and intersolubility of *** was found that the thermal stability of bio-oil was better than the light fraction,but worse than the middle and heavy fractions.

关键词： biochemical engineering bio-oil fast pyrolysis decomposition distillation

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R&D Analysis of Bio-fuel Alternative Fossil Fuel Production Through Biomass fast pyrolysis and Bio-Oil Hydrotreating

R&D Analysis of Bio-fuel Alternative Fossil Fuel Production ...

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第十三届中国科协年会第7分会场-实现“2020年单位GDP二氧化碳排放强度下降40-45%”的途径研讨会

作者：张瑞芹郑州大学环境科学研究院

The second generation of bio-fuel produced from biomass of agricultural residues and forest residues and some energy crop,has attracted more and more *** bio-fuel produced via fast pyrolysis of biomass and catalytic hydrotreating of bio-oil,can be utilized instead of gasoline and *** R&D status of bio-fuel via biomass pyrolysis and hydrotreating bio-oil international and domestic was *** governments in the United States and in Europe already invest big fund annually for the second generation *** clusters combined with research facilities,universities and biologic and petrochemical companies make progress on fundamental study,pilot programs and commercial *** the biomass conversion scale was assumed 200 dry tons per day(dtpd) of biomass and based on our research results,1.0 ton biomass can produce 0.22 to 0.24 ton bio-fuel of HHV 45 MJ/*** estimation of GHG emission saving are about 2.66 TCO2 eq/T *** cost of bio-fuel is 6.26 RMB/kg or 5.13 RMB/*** analysis suggests that production of hydrocarbon bio-fuels from biomass via the pyrolysis and hydrotreating route is potentially economically *** is urgent to build pilot facilities for the further assessment of the bio-fuel production system via pyrolysis route according to test results for commercial *** achieve the potential for producing hydrocarbon fuels from biomass,additional research and development are *** development of bio-fuel via pyrolysis route is significant for fossil fuel supply *** it will let us adapt to climate change positively and make substantial contribution to reduce GHG emissions.

关键词： Biomass renewable energy fast pyrolysis bio-oil bio-fuel Hydrotreating

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Semi-Interpenetrating Novolac-Epoxy Thermoset Polymer Networks Derived from Plant Biomass

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Journal of Renewable Materials 2018年第7期6卷 724-736页

作者： Mehul Barde Yusuf Celikbag Brian Via Sushil Adhikari Maria LAuad Center for Polymers and Advanced Composites Auburn UniversityAuburn36849ALUnited States of America Department of Chemical Engineering Auburn UniversityAuburn36849ALUnited States of America Forest Products Development Center Auburn UniversityAuburn36849ALUnited States of America Department of Biosystems Engineering Auburn UniversityAuburn36849ALUnited States of America

Bio-based phenol-formaldehyde polymer (BioNovolac) was developed by reacting molar excess of bio-oil/phenolwith formaldehyde in acidic medium. Glycidyl 3,5-diglycidoxybenzoate (GDGB), was prepared by directglycidylation of α-resorcylic acid (RA), a naturally occurring phenolic monomer. GDGB was crosslinked in thepresence of BioNovolac by anionic polymerization. Fourier transform infrared spectroscopy (FTIR) confirmedthe formation of semi-interpenetrating polymer networks. The glass transition temperature and moduli of biobasedcrosslinked systems were observed to increase with increasing GDGB content. Active chain density andmass retention measured by dynamic mechanical analysis (DMA) and Soxhlet extraction, respectively, indicated ahigh crosslink density of the cured networks. Scanning electron microscopy (SEM) images depicted thehomogeneity of the bulk phase. The preparation of bio-based epoxy-novolac thermoset network resulted inreduced consumption of petroleum-based chemicals.

关键词： fast pyrolysis bio-oil BioNovolac semi-interpenetrating polymer networks

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Enhanced anaerobic digestion of corn stover by thermo-chemical pretreatment

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International Journal of Agricultural and Biological Engineering 2015年第1期8卷 84-90页

作者： Wang Fang Niu Weisheng Zhang Andong Yi Weiming School of Agricultural and Food Engineering Shandong University of TechnologyShandong Research Center of Engineering and Technology for Clean EnergyZibo 255049Shandong ProvinceChina College of Engineering Shenyang Agricultural UniversityShenyang 110866Liaoning ProvinceChina

In order to solve the problem of lignocellulose degraded speedily and efficiently in anaerobic digestion,the thermo-chemical pretreatment was applied to enhance biogas production from corn *** stover was thermo-chemical pretreated with a fluidized bed pyrolysis reactor at 180℃,200℃ and 220℃,*** degradations during pretreatment were 15.07%,32.57% and 33.31%,*** Scanning Electron Microscope(SEM)images and Fourier Transform Infrared Spectroscopy(FTIR)spectra confirm that the thermo-chemical pretreatment can change the structure of corn stover and make lignin content *** thermo-chemical pretreated corn stover was digested using a 2-L fermentation *** results showed thermo-chemical pretreatment could improve biodegradability and enhance biogas *** highest total biogas production was 23319 mL for 20 d which was 10.0% higher than that of the untreated corn stover.

关键词： biogas production corn stover anaerobic digestion fast pyrolysis thermo-chemical pretreatment

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Life cycle assessment of biofuel production from microalgae cultivated in anaerobic digested wastewater

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International Journal of Agricultural and Biological Engineering 2020年第1期13卷 241-246页

作者： Gang Li Zhitao Lu Jiang Zhang Huan Li Yuguang Zhou Ali Mohammed Ibrahim Zayan Zhigang Huang School of Material Science and Mechanical Engineering Beijing Technology and Business UniversityBeijing 100048China Bioenergy and Environment Science&Technology Laboratory College of EngineeringChina Agricultural UniversityBeijing 100083China Key Laboratory of Clean Production and Utilization of Renewable Energy Ministry of Agriculture and Rural AffairsBeijing 100083China National Center for International Research of BioEnergy Science and Technology Ministry of Science and TechnologyBeijing 100083China Department of Agricultural Engineering Faculty of AgricultureOmdurman Islamic UniversityOmdurman ProvinceKhartoum StateSudan

The whole process of biofuel production from Desmodesmus *** 8-10 cultivated in anaerobic digested wastewater(ADW)under the optimal temperature was evaluated by using the method of Life Cycle Assessment(LCA).The energy efficiency and environment emissions were under considerable for the corresponding parametric *** functional unit was 1 kg *** was concluded that the harvest stage was responsible for the main energy consumption during the microalgal whole pyrolysis *** energy conversion efficiency of the whole process was larger than 1,which indicated that the process was *** environmental impact of the whole process was 1165.67 mPET2000,among which the primary impact on the environment was eutrophication that accounts for 57.36%,followed by photochemical ozone synthesis(22.56%),acidification(17.36%);and global warming(2.73%),respectively.

关键词： microalgae fast pyrolysis life cycle assessment(LCA) anaerobic digested wastewater(ADW) biofuel production

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