碳化钼催化材料的制备、表征及CO加氢反应性能的研究

Preparation and characterization of molybdenum carbide and its performance on the hydrogenation of carbon monoxide

以MoO3为前驱体,CH4/4H2为碳化介质,通过程序升温反应法(TPRe)制备了不同晶型碳化钼(β-Mo2C和α-MoC1-x)催化材料,并通过XRD、BET、TEM、SEM和XPS等表征手段对碳化钼材料的晶体结构、比表面积、形貌及电子特征进行了研究;同时考察了不同晶型碳化钼的CO加氢反应性能。结果表明,其具有很高CO加氢活性,产物主要为烷烃,同时有少量低碳醇生成。因此,碳化钼有望成为新型F-T合成或低碳醇合成的催化剂。

Molybdenum carbide of both β-Mo2C and α-MoC1-x crystalline forms was prepared by temperature programmed reaction（TPRe） between MoO3 and CH4/4H2.The structure and morphology of molybdenum carbide were characterized by XRD,BET,TEM,SEM and XPS.Its catalytic activity in the hydrogenation of carbon monoxide were investigated under 573 K,8.0 MPa,GHSV=2 000 h-1,n（H2）/n（CO）=1.0.The results indicated that light hydrocarbons of C1～4 are the main products in the hydrogenation of carbon monoxide over molybdenum carbides,with the formation small amounts of alcohols（〈 4%）.Molybdenum carbide could then be a potential catalyst for the F-T synthesis or the alcohol synthesis.