The reduction characteristics of Co or Mo oxide catalysts supported on activated carbon and alumina was studied under hydrogen atmosphere using a flow microbalance reactor. The results of TPR study and reduction kinetics study analyzed by the Elovich mechanism showed thst the catalysts supported on the carbon have higher extent of reduction than those supported on alumina. The suggests that the carbon support has less and more homogeneous interaction with the metal phase. The precursor oxide states examined by DRS and XRD and the reduced states investigated by the ethylene hydrogenation reaction and the hydrogen chemisorption are in good correlation with the proposed explanation.
