文献类型：期刊文献

中文题名：K_2CO_3催化剂在煤焦热解中的形态转变及其对煤焦催化气化的影响

英文题名：Transformation of K_2CO_3 as a catalyst during coal char pyrolysis and its effect on coal char catalytic gasification

作者：王西明[1];竹怀礼[1];王兴军[1,2];刘海峰[1,2];于广锁[1,2];王辅臣[1,2]

机构：[1]华东理工大学煤气化及能源化工教育部重点实验室,上海200237;[2]上海煤气化工程技术研究中心,上海200237

年份：2014

卷号：42

期号：2

起止页码：175

中文期刊名：燃料化学学报

外文期刊名：Journal of Fuel Chemistry and Technology

收录：CSTPCD;;EI(收录号：20141317512369);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家重点基础研究发展规划(973计划;2010CB227000)

语种：中文

中文关键词：碳酸钾;流动;催化气化;添加方式;粒径

外文关键词：potassium carbonate; mobility; catalytic gasification; loading method; particle size

摘要：在固定床中考察了不同温度下神府煤焦催化热解中K2CO3的转变形态,以及在TG-DSC分析仪上研究了K2CO3添加方式和粒径对其气化速率的影响。结果表明,随着气化温度的升高,催化剂的添加方式对煤焦气化反应速率的影响减弱;对热解残渣的SEM/EDX谱图显示,随着温度升高,K催化剂在煤焦中能展现更好的分散性;在热解过程中,煤焦中的碳通过与K2CO3反应释放出CO2和CO,生成的气体量与温度相关;在较低温度650℃下,不同粒径对气化效果影响差别较大,粒径越小气化反应性越好。K2CO3的流动性随着温度升高而增强,催化活性也越强;低于700℃时,要考虑添加方式对气化反应性的影响。
The transformation of K2CO3 in the course of Shenfu char catalytic pyrolysis under differenttemperatures was studied in the fixed-bed reactor; the influence of loading methods of K2CO3 and particle size ongasification reactivity was investigated in a TG-DSC analytical reactor. The results showed that with the increaseof temperature, the effect of loading methods on gasification rate is weakened; K catalyst shows high dispersityby means of SEM / EDX analysis of pyrolysis residue. CO2 and CO are produced through the interaction ofK2CO3 and coal char in the pyrolysis and there is a linear relation between the amount of released gas andtemperature. The particle size of K2CO3 and coal char has notable impact on gasification; the gasification rateincrease with a thinner particle at 650 ℃. K2CO3 shows high mobility within the coal char phase at elevatedtemperature, which is consistent with its catalytic activities; the effect of loading methods on gasification shouldbe considered under a temperature below 700 ℃.