摘要
利用热重法和X射线衍射法,研究了神府煤热解焦CO_2气化过程中,碱金属碱土金属(AAEM)催化剂对气化活性和微晶结构的影响。比较了负载方式(先热解后负载和先负载后热解)、催化剂种类(Na、K、Ca)以及催化剂添加量(金属原子质量分数1%、3%、5%)的影响。结果表明,对碱金属催化剂,先热解后负载焦样的反应活性比先负载后热解的更好,而碱土金属负载方式对活性的影响则相反;Na和K的催化能力相接近,且两者都比Ca强;煤焦气化活性随AAEM负载量的增加而增强。负载AAEM催化剂均能抑制煤焦石墨化进程,其中,K的抑制作用最强,Ca的抑制作用最弱;抑制作用随添加量增加而增强。
The gasification reactivity and crystallite structure of Shenfu char were measured via thermogravimetric analysis （ TGA） and X-ray diffraction technology （ XRD） to investigate the catalytic effect of AAEM during CO2 gasification. The interest was focused on effects of loading method （ pyrolysis before loading or pyrolysis after loading） , catalyst species （ Na, K, Ca） and loading amount （1%, 3%, 5% on metal atom） . For Na and K, the reactivity of char pyrolyzed before loading catalyst is better than that pyrolyzed after loading. The order of catalytic efficiency is Na^K〉Ca. In addition, catalytic efficiency of AAEM catalyst increases with the increasing of loading amount. Catalyst addition inhibits the progress of char graphitizing during pyrolysis. The order of inhibition is K〉Na〉Ca, and the inhibition is enhanced with the increase of loading amount.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2016年第8期897-903,共7页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(21376079
21376081)资助~~
关键词
催化气化
AAEM
负载方式
气化活性
微晶结构
catalytic gasification
AAEM
loading method
gasification reactivity
crystallite structure
