Characteristics of rapid pyrolysis of Shengli brown coal
Xu Xiuqiang
Ding Li
Guo Qihai
Zhao Xiaonan
Abstract：To investigate the influence of pyrolysis temperature on pyrolysis product grade and residual volatile,the effect of temperature from 400 ℃ to 900 ℃ on the yield of pyrolysis product,gas composition,micro-structure of char and the residual volatiles were examined in a 10 kg/h self-made experimental equipment for rapid pyrolysis of brown coal using Shengli brown coal as a raw material.Results show that char yield decreases and gas yield increases gradually with temperature.The tar yield increases firstly and then decreases,and reaches a maximum at 700 ℃.The CO2 in pyrolysis gas decreases slowly while H2 and CO increases with temperature.Besides,with rising of temperature,the volatiles release continuously,which leads to a reduction of O-containing functional groups as well as the highly active small aromatic ring matters.Less residual volatiles and more fixed carbon are left in char when it is higher than 700 ℃,which can meet the requirement of calcium carbide coke.
Keywords：Shengli brown coalpyrolysischarpyrolysis gastar
Publication Date：2017-01-01