摘要
对小龙潭褐煤进行酸洗、低温灰化和离子交换法处理,在热重上研究矿物质对煤气化反应性的影响.实验结果显示:酸洗使煤的比表面积、孔表面积和孔体积增大;随着气化反应的进行,煤中含碳物质不断消耗,煤中的铁发生团聚现象,降低气化反应性;过多的矿物质会抑制气化反应,阻碍气体产物的释放;Na以羧酸盐形式存在时促进煤的气化反应,以硅酸盐形式存在时无催化作用.
The Xiaolongtan lignite was treated by acid washing, low temperature ashing, ion exchange method, and the effects of mineral matters on coal gasification reactivity was investigated by thermo- gravimetric analyzer. The experiment results show that the specific surface area, pore surface and pore volume increase after acid washing, with the conduct of the gasification reaction, the gasification reactivity of coal decreases with the consumption of carbonaceous materials, the reason for that is the agglomeration behavior of iron. Excessive mineral matters inhibit the gasification and hinder the re- lease of gas products. Na promotes the gasification reactivity in the form of carboxylate, and without catalytic effect in the form of silicate.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第11期115-118,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50976040
50936001)
国家重点基础研究发展计划资助项目(2010CB227003)
关键词
褐煤
催化
气化
矿物质
低温灰化
比表面积
离子交换
lignite
catalysis
gasification
mineral matters
low temperature ashing
specific surfacearea
ion exchange
