Roles of Ceria on Copper and Manganese Oxides Catalyst——Adsorption of NO and CO
来源期刊：Journal of Rare Earths1993年第4期
论文作者：卢冠忠 汪仁
文章页码：263 - 268
摘 要：<正> A microreactor system and TPD techniques were used to study the reaction kinetics of the CO+NO reaction and the adsorption of CO,NO,CO2 and N2O over Cu-Mn-O（Ⅰ）and Cu-Mn-Ce-O（Ⅱ）catalysts.The results show that the catalytic activity of（Ⅱ）is higher than that of（Ⅰ）for the CO+NO reac-tion,and the higher the conversion of NO,the larger was the activity difference between（Ⅰ）and（Ⅱ）.For（Ⅰ）the rate of NO elimination is dependent on the partial pressures of NO,CO,CO2 with the kinetics or-ders of 0.48,0.56,0.08,respectively.The TPD study shows that the presence of Ce in（Ⅱ）may promote theadsorption of NO,CO on the surface,i.e.an increase of the coverage θNO,θCO,which result in a decrease ofthe hindrance of the reaction products.For CO2 and N2O the situation is in the opposite,the presence of Cemakes the θCO2)and θNOon（Ⅱ）decrease,which weakens the inhibition of CO2 for the reaction.
卢冠忠，汪仁
摘 要：<正> A microreactor system and TPD techniques were used to study the reaction kinetics of the CO+NO reaction and the adsorption of CO,NO,CO2 and N2O over Cu-Mn-O（Ⅰ）and Cu-Mn-Ce-O（Ⅱ）catalysts.The results show that the catalytic activity of（Ⅱ）is higher than that of（Ⅰ）for the CO+NO reac-tion,and the higher the conversion of NO,the larger was the activity difference between（Ⅰ）and（Ⅱ）.For（Ⅰ）the rate of NO elimination is dependent on the partial pressures of NO,CO,CO2 with the kinetics or-ders of 0.48,0.56,0.08,respectively.The TPD study shows that the presence of Ce in（Ⅱ）may promote theadsorption of NO,CO on the surface,i.e.an increase of the coverage θNO,θCO,which result in a decrease ofthe hindrance of the reaction products.For CO2 and N2O the situation is in the opposite,the presence of Cemakes the θCO2)and θNOon（Ⅱ）decrease,which weakens the inhibition of CO2 for the reaction.
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