Abstract：
Five industrial catalysts have been studied by means of thermal analysis(DTA, TG), TPR together with XRD, TEM, SEM and IR. The results indicate that the Cr present in the catalysts, besides ist well known promoting action, on dispersion, specific surface area and stability of structure, can also enhance: its reduction temperature and reduce its rate and total degree of reduction with the result of raising its Fe~(2+)/Fes~(3+) ratio and preventing Fe_3O_4 from over-reduction.The overall effect is higher activity and thermal stability.The kinds of reducing agents(dry H_2, wet H_2,CO and CO-CO_2)and their concentrations and reduction temperatures can affect nobably the reduction behavior, Hydrogen is generally suitable, but the direct use of CO is not, Ruduction property and thermal stability do not directly related to the Fe_2O_3 crystal habit, but depend on, catalyst composition, preparation and strueture. Naturally, diffrent catalysts will have their own proper reduction schedule. All of the above mentioned in formations are obtained by carefully analyzing DTA, TG and TPR data, from which their catalytic properties can be interpereted and predicted to some extent.
LI Yu-Min, ZHANG Ji-Yan, WANG Ri-Jie, LI Yong-Dan, ZHANG Liu.Effect of Cr on the Thermal Stability and Reduction Behavior of Industrial High Temperature Shift Fe-Cr Catalysts[J]. Chemcial Industry and Engineering, 1990,7(1/2): 1-10
1990, Vol. 7 
