Study on carbonization of lignin by TG-FTIR and high-temperature carbonization reactor

被引:183
作者
Cao, Jun [1 ]
Xiao, Gang [1 ,2 ]
Xu, Xiao [1 ]
Shen, Dekui [1 ]
Jin, Baosheng [1 ]
机构
[1] Southeast Univ, Key Lab Energy Thermal Convers & Control, Minist Educ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China
[2] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Inst Thermal Power Engn, Hangzhou 310027, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Lignin; Carbonization; Charcoal; TG-FTIR; Functional groups; PRIMARY PYROLYSIS; KRAFT LIGNIN; BIO-OIL; CARBON; CELLULOSE; HEMICELLULOSE; KINETICS; NICKEL; YIELDS;
D O I
10.1016/j.fuproc.2012.06.016
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Biomass charcoal is dominantly made from lignin. It is necessary to study lignin carbonization process to improve the quality of biomass charcoal. A Thermo-Gravimetric Analyzer coupled with a Fourier Transform Infrared Spectrometry (TG-FTIR) was applied to investigate the kinetics of lignin carbonization. Three mass loss stages (drying, pyrolysis and carbonization) were observed below 900 degrees C and another stage (structural rearrangement stage) with a slight mass loss was noticed between 900 and 1200 degrees C. Charcoal obtained at different temperatures was analyzed by FTIR to track the variation of functional groups. The pyrolysis of lignin started at 200 degrees C and charcoal was initially formed till 500 degrees C together with the intensive evolution of volatiles including various phenyl compounds. Amorphous carbon was formed between 500 and 900 degrees C, while most benzene rings structures were transformed into aromatic structures with emission of CO. When the temperature increased from 900 degrees C to 1400 degrees C, most C=C bonds were cleaved and a new charcoal structure, between amorphous carbon and graphite structures, was probably formed. The activation energies of the above three stages were estimated to be 54 kJ/mol, 70 kJ/mol and 178 kJ/mol. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:41 / 47
页数:7
相关论文
共 41 条
[1]  
[Anonymous], 1993, WOOD CHEM, DOI DOI 10.1016/B978-0-08-092589-9.50005-X
[2]   Application of an Fourier Transform-Infrared Imaging Tool for Measuring Temperature or Reaction Profiles in Pyrolyzed Wood [J].
Bahng, Mi-Kyung ;
Donohoe, Bryon S. ;
Nimlos, Mark R. .
ENERGY & FUELS, 2011, 25 (01) :370-378
[3]   An overview of fast pyrolysis of biomass [J].
Bridgwater, AV ;
Meier, D ;
Radlein, D .
ORGANIC GEOCHEMISTRY, 1999, 30 (12) :1479-1493
[4]   PYROLYSIS MECHANISMS OF LIGNIN - SURFACE-IMMOBILIZED MODEL-COMPOUND INVESTIGATION OF ACID-CATALYZED AND FREE-RADICAL REACTION PATHWAYS [J].
BRITT, PF ;
BUCHANAN, AC ;
THOMAS, KB ;
LEE, SK .
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 1995, 33 :1-19
[5]   The behavior of kraft lignin during thermal treatment [J].
Brodin, Ida ;
Sjoholm, Elisabeth ;
Gellerstedt, Goran .
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2010, 87 (01) :70-77
[6]  
Brunow G., 1998, Lignin and Lignan Biosynthesis, P131, DOI DOI 10.1021/BK-1998-0697.CH010
[7]   Study of the primary pyrolysis of Kraft lignin at high heating rates: Yields and kinetics [J].
Caballero, JA ;
Font, R ;
Marcilla, A .
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 1996, 36 (02) :159-178
[8]   Pyrolysis of Kraft lignin: Yields and correlations [J].
Caballero, JA ;
Font, R ;
Marcilla, A .
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 1997, 39 (02) :161-183
[9]   Comprehensive Kinetic Modeling Study of Bio-oil Formation from Fast Pyrolysis of Biomass [J].
Calonaci, Matteo ;
Grana, Roberto ;
Hemings, Emma Barker ;
Bozzano, Giulia ;
Dente, Mario ;
Ranzi, Eliseo .
ENERGY & FUELS, 2010, 24 (10) :5727-5734
[10]   Biomass pyrolysis: Kinetic modelling and experimental validation under high temperature and flash heating rate conditions [J].
Dupont, Capucine ;
Chen, Li ;
Cances, Julien ;
Commandre, Jean-Michel ;
Cuoci, Alberto ;
Pierucci, Sauro ;
Ranzi, Eliseo .
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2009, 85 (1-2) :260-267