燃料化学学报2017，Vol.45Issue(3)：272-278,7.
CO2气氛对胜利褐煤热解过程的影响
Effect of CO2 on pyrolysis behavior of Shengli lignite
摘要
Abstract
The pyrolysis of Shengli lignite (5-8mm) under CO2 atmosphere was investigated at the temperature from 400 to 700℃ in a fixed bed reactor, the effect of CO2 on the distribution of gas, solid and liquid phase in the product was analyzed, and the influence mechanism on the char structure under CO2 atmosphere was explored.The results indicate that the yields of tar and water from pyrolysis under CO2 atmosphere are higher than that under N2 atmosphere, with a decrease in char and gas yield.At 400℃ and 500℃, the surface area and pore volume of the char prepared under CO2 atmosphere are nearly the same as that under N2 atmosphere, while at 600 and 700℃, the surface area and pore volume of the char prepared under CO2 atmosphere are higher than that under N2 atmosphere.It maybe attributes to that CO2 can not only promote the release of volatile, but can also react with the active sites in the channels of char.The introduction of CO2 into pyrolysis can increase the aromaticity of char due to the consumption of 3-5 rings aromatic structures.The yields of H2 and CH4 obtained from pyrolysis under CO2 atmosphere are lower than that obtained under N2 atmosphere at 600 and 700℃, and the yield of CO is much higher because of the occurrence of the char-CO2 reaction.关键词
褐煤/热解/半焦性质/CO2气氛Key words
lignite/pyrolysis/char property/CO2 atmosphere分类
化学化工引用本文复制引用
郝成浩,朱生华,白永辉,李凡..CO2气氛对胜利褐煤热解过程的影响[J].燃料化学学报,2017,45(3):272-278,7.基金项目
国家高技术研究发展计划(863计划, 2015AA050503)资助 The project was supported by National High Technology Research and Development Program of China (863 program, 2015AA050503). （863计划, 2015AA050503）
