A series of catalysts on the basis of 10 wt.% CuO/y-AI203, 10 wt.% CuO ＋ 10 wt.% Cr2O3/y-AI203 and 15 wt.% MnO2/y -A1203 have been prepared and modified by CeO2 with contents up to 20 wt.%. Physico-chemical propertie...A series of catalysts on the basis of 10 wt.% CuO/y-AI203, 10 wt.% CuO ＋ 10 wt.% Cr2O3/y-AI203 and 15 wt.% MnO2/y -A1203 have been prepared and modified by CeO2 with contents up to 20 wt.%. Physico-chemical properties of the catalysts were determined by the methods of BET Adsorption, XRD, and TPR. Oxidative activity of the catalysts was studied at the temperature range 90-220 ℃and CO concentration of 3 mol.%. Addition of CeO2 led to changes in physico-chemical properties of the catalysts and formation of novel active centres that increased the activity of CuO and Cr203 containing catalysts, but decreased the activity of those, containing MnO2. The catalyst sample containing 10 wt.% CuO and 15 wt.% CeO2 has been shown to be the best one for complete conversion of CO. At the given conditions on this catalyst the complete oxidation of CO to CO2 occurred at 130 ~C during more than 500 h.展开更多
文摘A series of catalysts on the basis of 10 wt.% CuO/y-AI203, 10 wt.% CuO ＋ 10 wt.% Cr2O3/y-AI203 and 15 wt.% MnO2/y -A1203 have been prepared and modified by CeO2 with contents up to 20 wt.%. Physico-chemical properties of the catalysts were determined by the methods of BET Adsorption, XRD, and TPR. Oxidative activity of the catalysts was studied at the temperature range 90-220 ℃and CO concentration of 3 mol.%. Addition of CeO2 led to changes in physico-chemical properties of the catalysts and formation of novel active centres that increased the activity of CuO and Cr203 containing catalysts, but decreased the activity of those, containing MnO2. The catalyst sample containing 10 wt.% CuO and 15 wt.% CeO2 has been shown to be the best one for complete conversion of CO. At the given conditions on this catalyst the complete oxidation of CO to CO2 occurred at 130 ~C during more than 500 h.
