生物质与低阶煤低温共热解转化研究

STUDY ON LOW TEMPERATURE CO-PYROLYSIS OF BIOMASS AND LOW RANK COAL

将野生浮萍与长焰煤以不同比例掺混,采用自行设计的煤干馏实验装置进行生物质与煤共热解实验,对液体产物煤焦油进行GC-MS分析,以探索生物质与煤低温共热解的反应及煤焦油轻质化规律.同时采用热重分析仪,探讨生物质添加对煤热解过程的影响机理.结果表明,随着混合样品中生物质量的增加,焦油收率增大10%左右,焦油中直链烷烃及高附加值的萘、酚和芴等化合物得到一定的富集,实现了低温煤焦油轻质化的目的.样品失重率增大,TG曲线向低温区移动,热解活化能逐渐减小,长焰煤、生物质及其混合物热分解动力学模型符合准一级动力学方程,两者的掺混促进了整个反应的进行.

Co-pyrolysis characteristics of low rank coal mixed with biomass（duckweed ）in different proportions were studied in a dry distillation equipment, and focusing on the coal tar of the product with GC-MS in order to investigate the reaction mechanism of the co-pyrolysis be- tween biomass and coal. Furthermore, the research studied on the pyrolysis mechanism with bio- mass added by thermogravimetric analyzer. The results show that low-temperature tar could be upgraded with the increasing of biomass content, straight chain alkanes and high-value chemicals such as naphthalene, phenol, anthracene were enriched. The biomass can do favor to the pyroly- sis process of coal by reducing the temperature of coal＇s pyrolysis and active energy（E）, The co- pyrolysis process belongs to first-order kinetic reaction, and the synergetic effect was found during coal and biomass co-prolysis by comparing with the individual pyrolysis.