摘要
为了深入系统的理解在高压下一步法煤催化制天然气工艺过程中的动力学机理,本文以水蒸汽为气化介质,通过高压热天平中的热重分析,对神木烟煤在不同催化剂下的气化并甲烷化特性进行了研究,分析了其气化特性及催化气化反应的动力学,分析结果表明,K15/Fe10/Ca5催化剂使煤转化成合成气的效率比较高,其次是K15/Fe10和K15/Fe10/Mn5,而求得其活化能分别为39.06,36.58和52.87kJ/mol,即反应速率最高的是K15/Fe10,其次是K15/Fe10/Ca5和K15/Fe10/Mn5。说明催化剂中加入碱土金属钙的氧化物,可提高气化气生成速度,而选择加入锰元素需慎重。该研究为一步法煤制天然气工艺提供了理论基础。
In this paper, to get the deep and systematic dynamic mechanism of the one-step catalytic coal gasification and methanation process under high pressure, through high pressure thermogravimetric analy- sis, the gasification and methanation performances of shenmu bituminous coal under different catalysts were studied and gasification performance was analyzed, with water vapor as the gasification medium. The gasification efficiency of K15/Fe10/Ca5 catalyst was higher, and then K15/Fe10 and K15/Fe10/Mn5 fol- lowed, and the activation energy were, respectively, 39.06, 36.58 and 52.87 kJ/mol. In other words, the reaction rate of K15/Fe10 was the highest, and then K15/Fe10/Ca5 and K15/Fe10/Mn5 followed. Adding alkaline earth metal calcium oxide in the catalyst, the gasification gas generating speed was improved, and manganese element should be careful to choose. The study of one-step coal gasification process provides a theoretical basis.
出处
《青岛大学学报（工程技术版）》
CAS
2015年第3期101-104,113,共5页
Journal of Qingdao University(Engineering & Technology Edition)
基金
"十二五"国家863项目(SS2012AA06213)
关键词
热重分析
催化剂
气化
甲烷化
动力学
thermogravimetric analysis
catalyst
gasification
methanation
dynamics
