化工进展2018，Vol.37Issue(5)：1753-1759,7.DOI:10.16085/j.issn.1000-6613.2017-1381
Fe/赤泥催化水蒸气气化煤焦的反应性与微结构特性
Characteristics of microstructures and reactivities during steam gasification of coal char catalyzed by red mud
摘要
Abstract
The coal char was gasified with steam in a fixed bed reactor at 900℃ with different mass ratio of Fe/RM catalyst. The reactivity,surface functional group,pore structure and carbon crystallite structure of char during different stages of gasification process were characterized by FT-IR,BET and Raman spectra. The results demonstrated that the steam gasification reactivity of char could be significantly improved with Fe1/RM2 catalyst. In the process of char-Fe1/RM2-steam gasification,the active functional groups,such as methylene,carboxyl and phenolic hydroxyl,formed on the surface of coal char interacted with Na+and Ca2+in Fe1/RM2. And thus,new small molecular active groups or compounds were formed. The specific surface area of char firstly increased and then decreased(6.98—323.22m2/g)with char conversion,while the average pore size had an opposite trend overall(2.91—11.25nm). The degree of carbon ordering was reduced first and then increased,and the relative content of amorphous carbon(0.371)was the highest when the conversion was 36%. In the initial stage of the char-Fe1/RM2 steam gasification reaction(XC=~36%),the char gasification reactivity was improved comprehensively due to the increased surface active groups,the enlarged specific surface area and the decreased ordering degree of the char. Reducing the degree of carbon ordering ranging with the carbon conversion from 36% to 62% was significant for the improvement of char gasification reactivity.关键词
煤焦/铁/赤泥/水蒸气气化/催化气化/微结构Key words
coal char/Fe/RM/steam gasification/catalytic gasification/microstructure分类
化学化工引用本文复制引用
燕希敏,苗鹏,常国璋,郭庆杰..Fe/赤泥催化水蒸气气化煤焦的反应性与微结构特性[J].化工进展,2018,37(5):1753-1759,7.基金项目
山东省重点研发计划(2016GSF117005)及山东省自然基金重点项目(ZR2015QZ02). （2016GSF117005）
