助剂对Mo2 C/MoO2-ZrO2催化剂异构化性能的影响

摘要

研究了 Mo2 C/MoO2-ZrO2催化剂上正己烷的异构化反应。分别以十六烷基三甲基溴化铵和聚乙二醇20000为模板剂,采用共沉淀法制备前驱体固体超强酸 MoO3-ZrO2,从前驱体 MoO3-ZrO2的 BET和 FTIR表征可以看出,所得样品具有适宜比表面积、孔径和孔容。前驱体 MoO3-ZrO2经碳化后总酸量大幅度的下降。加入混合助剂的 Mo2 C/MZ-P0.005-C0.5的催化剂无论转化率和选择性都要比加入单一助剂的催化剂要高得多,其转化率达67.5%,选择性75.2%。%The isomerization of n-hexane over Mo2 C/MoO2-ZrO2 catalyst was investigated.First, the precursor solid superacid MoO3-ZrO2 was prepared by coprecipitation process,using the mixture of cetyltrimethylammonium bromide and polyethylene glycol 20000 as templates.It can be seen that the precursor samples had applicable surface area,pore diameter and volume from the BET and FTIR characterization of the Mo2 C/MoO2-ZrO2 .The total acid of precursor MoO3-ZrO2 had a large decline after carbonized.The conversion and selectivity of Mo2 C/MZ-P0.005-C0.5 are much more than single auxiliary catalystafter adding catalyst mixed assistant.The conversion rate and selectivity reached 67.5%,75.2%,respectively.