Catalytic behavior and coke formation of Modified Fe/MnO catalysts

摘要

A series of Fe/MnO catalysts 9Fe/Mn=1/4) modified with K, Cu, Co, Pd and Rh for CO hydrogenation were prepared to obtain a higher Selectivity to low molecular weight olefins. The catalytic behavior of these Catalysts was studied at temperature of 543 K, under pressure of 1.1 MPa And with GHSV=215 h~-1. It was found that the activity of CO hydrogenation Increased over the modified Fe/MnO catalysts execpt K-Fe-MnO. An Increase in the selectivity to C~=_2～C_4~= was also observed over Cu and Co Modified catalysts. Influences of coke formation on the catalytic activities of Cayalsts were investigated. A relationship between the activity of CO Hydrogenation and coke deposits was suggested.