CO2加氢合成异丁烷及异构C5+烃复合催化剂的研究

Hydrogenation of carbon dioxide was studied over Fe-Zn-M／zeolite composite catalysts. Effects of Fe content and M of Fe-Zn-M catalysts and the ratio of SiO2/Al2O3 of zeolite and the different zeolite on the conversion of CO2 and the selectivity of products were investigated It was found that with the increase of Fe content in Fe-Zn-M catalysts the activity of composite catalysts was improved. The catalytic performance of composite catalysts was affected by the different M and zeolite of composite catalysts. H-type zeolite was advantageous to form C2+ hydrocarbons while the HY zeolite was the most effective one to synthesis iso-alkanes. Furthermore, the distribution of hydrocarbon of products was influenced by the acidity and structure of the zeolites. The medium-strong and high-strong acid sites over the zeolite are advantageous to the synthesis of iso-alkanes. The SiO2/Al2O3 ratio of HZSM-5 zeolite affects the activity and the selectivity of composite catalysts. Low SiO2/Al2O3 ratio results in high activity and selectivity for the composite catalysts.

将CO2作为碳资源，研究CO2在Fe系氧化物上的活化、加氢过程以及分子筛孔道结构、酸性中心对异丁烷、异构C5+烃生成的影响。通过对异丁烷、异构C5+烃在改性Fe系／分子筛复合催化剂上生成机理的研究，开发出高选择性合成异丁烷及异构C5+烃的新型催化体系。因此,勾讼罟ぷ? 为CO2的固化利用开辟一条新的途径，并且对于催化剂制备科学增添新的知识。