文献类型：期刊文献

中文题名：生物质油精制前后热稳定性和热分解动力学研究

英文题名：Thermal Stability and Thermal Decomposition of Bio-oil Before and After Upgrading

作者：郭晓亚[1];颜涌捷[1];李庭琛[1];任铮伟[1]

机构：[1]华东理工大学能源化工系,上海200237

年份：2004

卷号：30

期号：3

起止页码：270

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家863计划(2001AA514021);国家自然科学基金(20176017)

语种：中文

中文关键词：生物质油;活化能;机理函数;热稳定性

外文关键词：bio-oil; activation energy; mechanism function; thermal stability

摘要：采用TGA-DTA联用测定生物质油的热失重曲线,用Achar微分法和Coats-Redfern积分法计算了挥发和热分解的活化能,并结合Satava法和Bagchi法确定热分解机理函数,得到了生物质油精制前后的非等温动力学方程。推断出热分解过程分别为三级反应和三维扩散3D反应,动力学方程分别为dα/dt=0.5Ae-E/RT(1-α)3和dα/dt=1.5Ae-E/RT(1-α)4/3[(1-α)-1/3-1]-1。实验表明,精制后的生物质油较精制前挥发的活化能降低了很多而热解活化能提高了很多,相应地,精制后的生物质油的挥发性和热稳定性都提高了很多。
Thermal weight loss curves of bio-oil were determined by the analytical method of TGA-DTA. Based on the experimental data, activation energies were calculated and the most probable mechanism functions were worked out, and therefore, non-isothermal kinetic equations were finally obtained, dα/dt=0.5Ae^(-E/RT)(1-α)~3 and dα/dt=1.5Ae^(-E/RT)(1-α)^(4/3)[(1-α)^(-1/3)-1]^(-1), to describe respectively the thermal decomposition behaviour of the bio-oil, directly from pyrolysis and through the subsequent (upgrading). Experiment show that for activation energies of volatilization, the upgraded bio-oil is higher than the bio-oil directly from pyrolysis, whereas for activation energies of thermal decomposition, the (upgraded) one is lower than the direct one. Accordingly, volatility and thermal stability for the upgraded bio-oil are improved.