Study of Cu-Fe-Co-M/SiO_2 (M = unpromoted, Li, Na, K and Cs) Catalysts for Mixed Alcohols Synthesis from CO Hydrogenation

摘要

A series of Cu-Fe-Co based catalysts prepared by co-impregnation method using different alkali additives was characterized by BET, XRD and FESEM-EDX and investigated under MAS from CO hydrogenation. The results showed that the catalyst Cu_(25)Fe_(22)Co_3-Na_3/SiO_2 has the highest catalytic activity and selectivity of total alcohol and C_5+OH. XRD and FESEM-EDX demonstrated the Na_3 catalyst exhibited homogeneous distribution of elements and effective synergy effect between Cu and Fe components, thereby performed good catalytic performances for MAS from CO hydrogenation. The presence of a suitable content of alkali promoter was necessary for mixed alcohols synthesis from syngas.