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.

武恒(1986-),男,硕士,工程师,研究方向为煤催化气化技术,hebutwuheng@126.com