Torrefaction of agriculture straws and its application on biomass pyrolysis poly-generation

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• 作者：Yingquan Chen^a ; ^{chyq721@qq.com" class="auth_mail} ; Haiping Yang^a ; ^{yhping2002@163.com" class="auth_mail} ; Qing Yang^b ; ^{qyang@hust.edu.cn" class="auth_mail} ; Hongmeng Hao^a ; ^{hhm0311@163.com" class="auth_mail} ; Bo Zhu^a ; ^{zhubo19850505@163.com" class="auth_mail} ; Hanping Chen^a ; ^{hp.chen@163.com" class="auth_mail}
• 关键词：Torrefaction ; Agriculture straw ; Pyrolytic polygeneration ; Product properties
• 刊名：Bioresource Technology
• 出版年：March, 2014
• 年：2014
• 卷：156
• 期：Complete
• 页码：70-77
• 全文大小：483 K

文摘

This study investigated the properties of corn stalk and cotton stalk after torrefaction, and the effects of torrefaction on product properties obtained under the optimal condition of biomass pyrolysis polygeneration. The color of the torrefied biomass chars darkened, and the grindability was upgraded, with finer particles formed and grinding energy consumption reduced. The moisture and oxygen content significantly decreased whereas the carbon content increased considerably. It was found that torrefaction had different effects on the char, liquid oil and biogas from biomass pyrolysis polygeneration. Compared to raw straws, the output of chars from pyrolysis of torrefied straws increased and the quality of chars as a solid fuel had no significant change, while the output of liquid oil and biogas decreased. The liquid oil contained more concentrated phenols with less water content below 40 wt.%, and the biogas contained more concentrated H₂ and CH₄ with higher LHV up to 15 MJ/nm³.