摘要
本文研究了木薯水解剩余木质素在N2氛围下的TG和DTG曲线,以及在不同升温速率下热裂解产物的组成随温度的变化情况。试验结果表明,在290~430℃之间热裂解速率最快;在400~800℃之间时,焦炭产量随着温度的升高而降低,焦油产量首先会随着温度升高而增加,在达到一个最大值后,随着温度的进一步升高,部分挥发分的二次热解会使焦油产量降低,气体产量随着温度的升高而增加,H2、CO、CH4和CO2等组分也随着温度的升高而有相应的变化;快速热解在600℃以下有利于焦油和焦炭的生成,在600℃以上有利于气体的生成。通过GC—M S分析发现焦油中的组分主要是苯酚类化合物。
TG(thermogravimetry) and DTG(derivation thermogravimetry) curves of cassava hydrolysis residues pyrolysis obtained in N2 atmosphere and the effect of temperature on pyrolysis product composition at different heating rates were studied.The pyrolysis velocity of lignin was the fastest at 290~430℃.The char yield decreased steadily with temperature rising at 400~800℃.The tar yield first increased to the max with temperature rising,after that it decreased due to the secondary decomposition.The gas yield increase...
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2006年第S1期125-128,共4页
Transactions of the Chinese Society of Agricultural Engineering
关键词
木质素
热裂解
产物组成
lignin
pyrolysis
product composition
