Effect of torrefaction on structure and fast pyrolysis behavior of corncobs

被引：204

作者：

Zheng, Anqing ^{[1
]}

Zhao, Zengli ^{[1
]}

Chang, Sheng ^{[1
]}

Huang, Zhen ^{[1
]}

Wang, Xiaobo ^{[1
]}

He, Fang ^{[1
]}

Li, Haibin ^{[1
]}

机构：

[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 128卷

关键词：

Torrefaction; Fast pyrolysis; Bio-oil; C-13; NMR; Pyrolysis mechanism; BIO-OIL; CELLULOSE; BIOMASS; WOOD; PRETREATMENT; TEMPERATURE; GASOLINE; WATER; NMR;

D O I：

10.1016/j.biortech.2012.10.067

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Pretreatment of corncobs using torrefaction was conducted in an auger reactor at 250-300 degrees C and residence times of 10-60 min. The torrefied corncobs were fast pyrolyzed in a bubbling fluidized bed reactor at 470 degrees C to obtain high-quality bio-oil. The heating value and pH of the bio-oil improved when the torrefaction as pretreatment was applied; however, increasing bio-oil yield penalties were observed with increasing torrefaction severity. Fourier transform infrared Spectroscopy (FTIR) and quantitative solid C-13 nuclear magnetic resonance spectrometry (NMR) analysis of torrefied corncobs showed that the devolatilization, crosslinking and charring of corncobs during torrefaction could be responsible for the bio-oil yield penalties. Gas chromatography-mass spectrometry (GC-MS) analysis showed that the acetic acid and furfural contents of the bio-oil decreased with torrefaction temperature or residence time. The results showed that torrefaction is an effective method of pretreatment for improving bio-oil quality if the crosslinking and charring of biomass can be restricted. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：370 / 377

页数：8

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