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Kinetics and Products Distribution Study on the catalytic Effect of Zn/HZSM-5 over pyrolysis of Chlorella through TG-FTIR and Py-GC/MS

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Journal of Thermal Science 2023年第4期32卷 1635-1643页

作者： WANG Lu YE Tao MA Xianming LIN Yan CHEN Juan WANG Fangbin MA Peiyong LIU Jian School of Food and Biological Engineering Hefei University of TechnologyHefei230009China School of Mechanical Engineering Hefei University of TechnologyHefei230009China Engineering Research Center of Bio-process Ministry of EducationHefei University of TechnologyHefei230009China

In this study,both the pyrolysis and catalytic pyrolysis behaviour of chlorella were investigated using thermogravimetric analysis combined with Fourier Transform Infrared spectrum(TG-FTIR)and Py-GC/*** results of TG indicated the pyrolysis of chlorella was divided into three stages,and the Coats-Redfern kinetic model was used for the analysis and validation of the obtained thermal *** regression coefficients indicated that the pyrolysis of chlorella was close to second-order *** activation energy of pyrolysis of chlorella and catalytic pyrolysis of chlorella+HZSM-5,chlorella+Zn/HZSM-5 was 61.645,59.080 and 56.808 kJ·mol^(−1),*** with the data of FTIR,we found that the addition of the HZSM-5 effectively reduced the activation energy required by pyrolysis;the addition of the Zn/HZSM-5 could not only reduce the activation energy,but also reduce the yield of oxygen-containing compounds,increase the emissions of CO_(2),and facilitate the production of high value-added hydrocarbon *** results were also verified by Py-GC/MS that the addition of Zn/HZSM-5 could reduce the formation of ketones and aldehydes and increase the production of nitrogen-containing ***,through the catalytic pyrolysis of chlorella,the utilization range of chlorella can be expanded,and better bio-oil can be obtained,which will play a crucial role in the selection of available energy in the future.

关键词： catalytic pyrolysis chlorella TG-FTIR kinetic Zn/HZSM-5 Py-GC/MS

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Energetic,bio-oil,biochar,and ash performances of co-pyrolysis-gasification of textile dyeing sludge and Chinese medicine residues in response to K_(2)CO_(3),atmosphere type,blend ratio,and temperature

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Journal of Environmental Sciences 2024年第2期136卷 133-150页

作者： Gang Zhang Zhiyun Chen Tao Chen Shaojun Jiang Fatih Evrendilek Shengzheng Huang Xiaojie Tang Ziyi Ding Yao He Wuming Xie Jingyong Liu Engineering Research Center of None-food Biomass Efficient pyrolysis and Utilization Technology of Guangdong Higher Education Institutes Dongguan University of TechnologyDongguan 523808China School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China School of Environment The Environmental Research InstituteMOE Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal UniversityGuangzhou 510006China Department of Environmental Engineering Bolu Abant Izzet Baysal UniversityBolu 14052Turkey

Hazardous waste stream needs to be managed so as not to exceed stock-and rate-limited properties of its recipient *** co-pyrolysis of Chinese medicine residue(CMR)and textile dyeing sludge(TDS)and its bio-oil,biochar,and ash quality and quantity were characterized as a function of the immersion of K_(2)CO_(3),atmosphere type,blend ratio,and *** to the mono-pyrolysis of TDS,its co-pyrolysis performance with CMR(the comprehensive performance index(CPI))significantly improved by 33.9%in the N_(2)atmosphere and 33.2%in the CO_(2)*** impregnation catalyzed the co-pyrolysis at 370℃,reduced its activation energy by 77.3 kJ/mol in the N_(2)atmosphere and 134.6 kJ/mol in the CO_(2)atmosphere,and enriched the degree of coke gasification by 44.25%in the CO_(2)*** impregnation increased the decomposition rate of the co-pyrolysis by weakening the bond energy of fatty side chains and bridge bonds,its catalytic and secondary products,and its bio-oil yield by 66.19%.Its bio-oils mainly contained olefins,aromatic structural substances,and *** immersion of K_(2)CO_(3)improved the aromaticity of the copyrolytic biochars and reduced the contact between K and Si which made it convenient for Mg to react with SiO_(2)to form *** co-pyrolytic biochar surfaces mainly included-OH,-CH_(2),C=C,and *** main phases in the co-pyrolytic ash included Ca_(5)(PO_(4))_(3)(OH),Al_(2)O_(3),and magnesium-silicate.

关键词： Chemical impregnation catalytic pyrolysis Chinese medicine residue Textile dyeing sludge Co-pyrolysis

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Importance of oxygen-containing functionalities and pore structures of biochar in catalyzing pyrolysis of homologous poplar

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Chinese Journal of Chemical Engineering 2024年第1期65卷 200-211页

作者： Li Qiu Chao Li Shu Zhang Shuang Wang Bin Li Zhenhua Cui Yonggui Tang Obid Tursunov Xun Hu School of Material Science and Engineering University of JinanJinan 250022China Joint International Research Laboratory of Biomass Energy and Materials College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China Shandong BASAN Graphite New Material Plant Zibo 255311China Department of Power Supply and Renewable Energy Sources National Research University TIIAMETashkent 100000Uzbekistan

Biochar and bio-oil are produced simultaneously in one pyrolysis process,and they inevitably contact and may interact,influencing the composition of bio-oil and modifying the structure of *** this sense,biochar is an inherent catalyst for *** this study,in order to investigate the influence of functionalities and pore structures of biochar on its capability for catalyzing the conversion of homologous volatiles in bio-oil,three char catalysts(600C,800C,and 800AC)produced via pyrolysis of poplar wood at 600 or 800℃or activated at 800℃,were used for catalyzing pyrolysis of homologous poplar wood at 600℃,*** results indicated that the 600C catalyst was more active than 800C and 800AC for catalyzing cracking of volatiles to form more gas(yield increase by 40.2%)and aromatization of volatiles to form more light or heavy phenolics,due to its abundant oxygen-containing functionalities acting as active *** developed pores of the 800AC showed no such catalytic effect but could trap some volatiles and allow their further conversion via sufficient ***,the interaction with the volatiles consumed oxygen on 600C(decrease by 50%),enhancing the aromatic degree and increasing thermal *** dominance of deposition of carbonaceous material of a very aromatic nature over 800C and 800AC resulted in net weight gain and blocked micropores but formed additional *** in situ diffuse reflectance infrared Fourier transform spectroscopy characterization of the catalytic pyrolysis indicated superior activity of 600C for removal of -OH,while conversion of the intermediates bearing C=O was enhanced over all the char catalysts.

关键词： Poplar wood catalytic pyrolysis Char catalyst Volatile-char interaction Bio-oil

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Study on characterization of bio-oil derived from sugarcane bagasse(Saccharum barberi)for application as biofuel

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Clean Energy 2022年第2期6卷 297-304页

作者： Syahirah Faraheen Kabir Ahmad Umi Fazara Md Ali Khairuddin Md Isa Subash CBGopinath Chemical Engineering Programme Faculty of Chemical Engineering&TechnologyUniversiti Malaysia PerlisArauMalaysia Centre of Excellence for Biomass Utilization(COEBU) Universiti Malaysia PerlisArauMalaysia

Lignocellulosic biomass especially,sugarcane bagasse Saccharum barberi sp.,appears to be a more suitable material for partial substi-tution of transport fuel(diesel)than Saccharum officinarum sp.,due to its structural similarity to transport fuel(diesel).Besides that,less research has been implemented on this type of ***-oil can be implemented as biodiesel by processing it further using chemical reactions such as hydrodeoxygenation and cracking with zeolite ***,the purpose of this study is to determine the compatibility of pyrolytic bio-oil produced from Saccharum barberi *** comparison with *** *** use as transport fuel(diesel)in automotive *** purpose can be accomplished by comparing the oil’s bio-physiochemical properties for both *** experiment is conducted on a bench-scale on which bio-oil of Saccharum barberi *** secured from the catalytic pyrolysis process at a temperature of 500°C and heating rate of 50°C/min with the addition of ZSM-Zeolite *** analysis of Saccharum barberi *** that cellulose is more reactive than lignin,evidenced by the high percentage of weight loss at tem-peratures ranging from 251°C to 390°*** high contents of carbon(40.7%)and hydrogen(6.50%),as well as slight traces of sulphur(0.08%)and nitrogen(0.85%),in bio-oil(Saccharum barberi sp.)indicate that it is conceivable to be partially used for replacement in biofuel *** physiochemical properties reveal that Saccharum barberi *** more potential than *** *** chromatography-mass spectrometry analysis reveals that bio-oil consists of high amounts of aromatic hydrocarbon(26.2%),phenol(14.8%)and furfural(13.0%)in comparison to *** sp.

关键词： sugarcane bagasse catalytic pyrolysis bio-oil physiochemical characterization biofuel

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Hydrogen storage by liquid organic hydrogen carriers:Catalyst,renewable carrier,and technology--A review

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Carbon Resources Conversion 2023年第4期6卷 334-351页

作者： Chenyang Chu Kai Wu Bingbing Luo Qi Cao Huiyan Zhang Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096PR China

Hydrogen has attracted widespread attention as a carbon-neutral energy source,but developing efficient and safe hydrogen storage technologies remains a huge ***,liquid organic hydrogen carriers(LOHCs)technology has shown great potential for efficient and stable hydrogen storage and *** technology allows for safe and economical large-scale transoceanic transportation and long-cycle hydrogen *** particular,traditional organic hydrogen storage liquids are derived from nonrenewable fossil fuels through costly refining procedures,resulting in unavoidable environmental *** holds great promise for the preparation of LOHCs due to its unique carbon-balance properties and feasibility to manufacture aromatic and nitrogen-doped *** to recent studies,almost 100%conversion and 92% yield of benzene could be obtained through advanced biomass conversion technologies,showing great potential in preparing biomass-based ***,the present LOHCs systems and their unique applications are introduced in this review,and the technical paths are ***,this paper provides an outlook on the future development of LOHCs technology,focusing on biomass-derived aromatic and N-doped compounds and their applications in hydrogen storage.

关键词： Liquid organic hydrogen carriers Biomass Hydrogen catalytic pyrolysis Hydrogen storage and release

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Hierarchical ZSM-11 with intergrowth structures:Synthesis,characterization and catalytic properties

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Journal of Energy Chemistry 2013年第5期22卷 761-768页

作者： Qingjun Yu Chaoyue Cui Qiang Zhang Jing Chen Yang Li Jinpeng Sun Chunyi Li Qiukai Cui Chaohe Yang Honghong Shan State Key Laboratory of Heavy Oil Processing Department of Chemical Engineering China University of Petroleum (East China) Dagang Petrochemical Company PetroChina Corporation

Hierarchical ZSM-11 microspheres with intercrystalline mesoporous properties and rod-like crystals intergrowth morphology have been synthesized using a spot of tetrabutylammonium as a single ***,FTIR,SEM,TEM and N2 adsorption analysis revealed that each individual particle was composed of nanosized rod crystals inserting each other and the intercrystalline voids existing among rods gave a significant mesopore size *** treatment result demonstrated the excellent hydrothermal stability of *** crystallization modes including constant temperature crystallization (one-stage crystallization) and two-stage temperature-varying crystallization with different 1st stage durations were *** results suggested that the crystallization modes were mainly responsible for the adjustable particle size and textural properties of samples while the small amount of tetrabutylammonium bromide was mainly used to direct the formation of both ZSM-11 framework and its intergrowth ***,the performance of optimal ZSM-11 as an active component for the catalytic pyrolysis of heavy oil was also *** with the commercial pyrolysis catalyst,the hierarchical ZSM-11 catalyst exhibited a high selectivity to desired products(LPG+gasoline+diesel),as well as a much lower dry gas and coke yield,plus a high selectivity and yield of light olefins(C=3 C=4)and very poor selectivity to ***,fully open micropore-mesopore connectivity would make such hierarchically porous ZSM-11 zeolites very attractive for applications in clean petrochemical catalysis field.

关键词： intercrystalline mesopore rod-like crystal single template crystallization modes accessibility hydrothermal stability catalytic pyrolysis

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Diameter-Controlled Growth of Carbon Nanotubes Through pyrolysis of Acetylene Using Rare Earth Alloy as Catalyst in Hydrogen

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Journal of Rare Earths 2004年第6期22卷 859-863页

作者：朱燕娟陈玉莲陈建林天津张春华刘秋香张海燕 Department of Applied Physics Guangdong University of Technology Guangzhou 510090 China Instrumentation Analysis and Research Center Zhongshan University Guangzhou 510275 China Faculty of (Materials) and Energy Guangdong University of Technology Guangzhou 510643 China

High-purity carbon nanotubes(CNTs)were synthesized in hydrogen ambience by CVD method by (using) rare earth alloy MlM_(5-1.35)(CoAlMn)_(1.35) as catalyst, acetylene as carbon source. The influence of hydrogen flow rate on the diameter, shape, purity, graphitization degree and output of carbon nanotubes was systematically studied by scanning selectronic microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD)and Raman technique. The results indicate that the size of MlM alloy particles changed from μm order into nm order during the process of hydrogen reduction. While no introducing hydrogen in the reaction of acetylene and catalyst, CNTs can also be synthesized on the catalyst. The CNTs are short and thick with average diameter of about 97.8 nm, and the wall of CNTs is also thick and rough. With increasing of hydrogen flow rate, the diameter of CNTs first decrease and then increase, while the output, purity, and graphitization degree first increase and then decrease. The optimized conditions are: CNTs reach its narrowest size with diameter of 49.1 nm when hydrogen flow rate is 50 ml·min^(-1). The purity, graphitization degree, and output of CNTs reach highest and largest when hydrogren flow rate is 75 ml·min^(-1). It has the most uniform tube size of 97.38 nm when hydrogen flow rate is 100 (ml·min^(-1).)

关键词： catalytic pyrolysis CNTs controllable diameter rare earth

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catalytic Transformation of Bio-oil to Olefins with Molecular Sieve Catalysts

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Chinese Journal of Chemical Physics 2012年第4期25卷 441-447,I0004页

作者：黄伟伟巩飞艳翟起李全新中国科学技术大学化学物理系合肥230026

catalytic conversion of bio-oil into light olefins was performed by a series of molecular sieve catalysts, including HZSM-5, MCM-41, SAPO-34 and Y-zeolite. Based on the light olefins yield and its carbon selectivity, the production of light olefins decreased in the following order： HZSM-5〉SAPO-34〉MCM-41〉Y-zeolite. The highest olefins yield from bio-oil using HZSM- 5 catalyst reached 0.22 kg/kgbio-oil with carbon selectivity of 50.7% and a nearly complete bio-oil conversion. The reaction conditions and catalyst characterization were investigated in detail to reveal the relationship between the catalyst structure and the production of olefins. The comparison between the pyrolysis and catalytic pyrolysis of bio-oil was also performed.

关键词： Bio-oil Olefins catalytic pyrolysis Molecular sieve catalyst

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Transformation of Biomass into Aromatics with Zeolite Catalysts

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Chinese Journal of Chemical Physics 2014年第3期27卷 361-367页

作者： Shu-mei Deng Ming-hui Fana Tie-jun Wang Quan-xin Li Department of Chemical Physics University of Science and Technology of China Hefei 230026China Key Laboratory of Renewable Energy and Gas Hydrate Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510540 China

Biomass is a nature renewable resource which can be used for the production of high value chemicals and bio-fuels. In the present work, the transformation of sawdust into aromat- ics such as benzene, toluene and xylenes was investigated over a series of zeolite catalysts （NaZSM-5, HZSM-5, ReY and HY catalysts）. Among the tested catalysts, the HZSM-5 catalyst shows the highest activity for the production of aromatics. The yield and carbon selectivity of aromatics reached about 26.5% and 62.5C-mo1%, respectively over the HZSM-5 catalyst under the optimal condition of T=450 ℃, f（N2）=300 cm^3/min, and catalyst/lignin ratio of 2. The effects of the reaction conditions including temperature, gas flow rate, and catalyst/sawdust ratio on the production of aromatics were investigated in detail and the formation of aromatics from lignocellulosic biomass was also addressed.

关键词： Biomass Aromatics Zeolite catalysts catalytic pyrolysis

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Solid catalytic growth mechanism of micro-coiled carbon fibers

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Science China(Technological Sciences) 2001年第4期44卷 377-382页

作者：杜金红苏革白朔孙超成会明 Institute of Metal Research Chinese Academy of Sciences Shenyang China

Micro-coiled carbon fibers were prepared by catalytic pyrolysisof acetylene with nano-sized nickel powder catalyst using the substrate method. The morphology of micro-coiled carbon fibers was observed through field emission scanning electron microscopy. It was found that the fiber and coil diameter of the obtained micro-coiled carbon fibers is about 500—600 nm and 4—5 μm, respectively. Most of the micro-coiled carbon fibers obtained were regular double carbon coils, but a few irregular ones were also observed. On the basis of the experimental observation, a solid catalytic growth mechanism of micro-coiled carbon fibers was proposed.

关键词： catalytic pyrolysis micro-coiled carbon fibers morphology solid catalytic mechanism

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