燃料化学学报2017，Vol.45Issue(2)：129-137,9.
神府煤热解的结构变化及煤焦加氢反应性研究
Structural changes of Shenfu coal in pyrolysis and hydrogasification reactivity of the char
摘要
Abstract
Coal hydrogasification, divided into coal pyrolysis and char hydrogasification, was studied in a fixed bed reactor. FT-IR gas analyzer, Laser Raman analyzer and XRD were applied to analyze the relationship between gas production component of coal pyrolysis and microstructure change of char, and the influence of microstructure change of char on char hydrogasification reactivity. The results show that pyrolysis temperature has an obvious effect on microstructure and hydrogasification reactivity of char. With rising temperature, the ratios of Raman band area AD1/AG, AD2/AG, AD3/AG, AD4/AG gradually rises, and the ratio of AG/AAl decreases within 400-800℃ and increases within 800-900℃. It indicates that graphitization process of char is obviously emerged due to the increase of relative amount of disordered carbon in pyrolysis. The results of XRD analysis are in accordance with those of Raman analysis. The interplanar crystal spacing d002 increases within 400-800 ℃. d002 decreases and L002 increases sharply within 800-900 ℃. By fitting the Raman area ratio formula ( aAD1/G+bAD2/G + cAD3/G + dAD4/G ) with hydrogasification reactivity (τ0. 5 ) , the obtained factor represents the hydrogasification reactivity of carbon microcrystal. The factor is bigger, and the reactivity of carbon microcrystal is better.关键词
煤热解/微观结构/煤焦加氢/拉曼分析Key words
coal pyrolysis/microstructure/char hydrogasification/Raman analysis分类
化学化工引用本文复制引用
张金刚,孙志刚,郭强,王兴军,于广锁,刘海峰,王辅臣..神府煤热解的结构变化及煤焦加氢反应性研究[J].燃料化学学报,2017,45(2):129-137,9.基金项目
The project was supported by the National Natural Science Foundation of China (21176078).国家自然科学基金(21176078)资助 （21176078）
