钾钠复合催化剂对煤气化反应的影响  

Effect of KCO-NaCO compound catalyst on coal gasification

作　　者：武恒 李克忠 吴松怡 赵锐君 刘雷 王会芳 WU Heng;LI Ke-zhong;WU Song-yi;ZHAO Rui-jun;LIU Lei;WANG Hui-fang(State Key Laboratory of Coal based Low Carbon Energy,ENN Science&Technology Development Co.,Ltd.,Langfang 065001,China)

机构地区：[1]新奥科技发展有限公司煤基低碳能源国家重点实验室,河北廊坊065001

出　　处：《现代化工》2020年第11期109-112,共4页Modern Chemical Industry

基　　金：国家重点基础研究发展计划(2011CB201305)。

摘　　要：以内蒙古王家塔煤为研究对象,在加压固定床中研究钾钠复合催化剂(K2CO3-Na2CO3)对煤气化反应的影响。结果表明,钾钠复合催化剂的催化效果接近K2CO3,既能提升碳转化率,又能催化甲烷化反应。不同负载方法中湿式氧化法催化效果优于浸渍法和干混法。利用红外光谱和化学定量分析揭示了湿式氧化法负载钾钠复合催化剂的机理过程,通过提高煤中羧基浓度促进复合催化剂与煤的离子交换反应过程,形成更多催化活性位点。The effect of K2CO3-Na2CO3 compound catalyst on coal gasification is researched at 750℃and 3.5 MPa in a pressurized fixed bed by using coal produced in Wangjiata,Inner Mongolia,China as study object.It is shown that this compound catalyst can promote carbon conversion efficiency and catalyze methanation reaction,with a catalytic effect close to that of K2CO3.The catalyst loaded by wet air oxidation method shows better catalytic effect than that loaded by dry blend method or impregnation method.The mechanism that using wet air oxidation method to load the compound catalyst is revealed by FT-IR and chemical quantitative analysis,showing that wet air oxidation method can enhance the ion exchange process between compound catalyst and coal,and form much more catalytic active site by improving the concentration of carboxyl.

关 键 词：煤气化 K2CO3 NA2CO3 复合催化剂 催化机理 

分 类 号：TQ546.2[化学工程—煤化学工程]