Mixed oxide catalyst Cs 0 1 Fe 2Co 6BiMnMo 12 O x was prepared by the interprecipitation method,then the catalyst was calcined at different temperature.Selective oxidation of isobutene was carried out in a fixed bed r...Mixed oxide catalyst Cs 0 1 Fe 2Co 6BiMnMo 12 O x was prepared by the interprecipitation method,then the catalyst was calcined at different temperature.Selective oxidation of isobutene was carried out in a fixed bed reactor.The results showed that the catalyst has high catalytic activity.Under the optimum reaction conditions (n( C = 4)∶n(O 2)=1∶2 1∶4,space velocity=180h 1 ,T=360℃),the yield of methacrolein and methacrylic reached 80%,8%,respectively.The total yields of liquid products(methacrolein,methacrylic acid and acetic acid)reached about 90%.展开更多
Nitrogen monoxide(NO) emitted from automobile exhaust and other industrial sources contributes largely to a variety of environmental problems, such as the formation of acid rain and photochemical smog Therefore, the c...Nitrogen monoxide(NO) emitted from automobile exhaust and other industrial sources contributes largely to a variety of environmental problems, such as the formation of acid rain and photochemical smog Therefore, the catalytic reduction of NO has become one of the urgent environmental issues In the present study, a series of Au/Mn 2O 3/Al 2O 3 catalysts, with different Mn 2O 3 loadings, were prepared by deposition precipitation The crystallite size of Au before and after reaction was characterized by XRD The activity of catalysts in the selective catalytic reduction of NO using propane in the presence of oxygen was evaluated It is found that the catalytic activity of Au/Mn 2O 3/Al 2O 3 is higher than that of Au/Al 2O 3 and Cu ZSM 5 at feed gas(0 6%NO+1 2%C 3H 8+5%O 2+He) and GHSV 5?000?h展开更多
文摘Mixed oxide catalyst Cs 0 1 Fe 2Co 6BiMnMo 12 O x was prepared by the interprecipitation method,then the catalyst was calcined at different temperature.Selective oxidation of isobutene was carried out in a fixed bed reactor.The results showed that the catalyst has high catalytic activity.Under the optimum reaction conditions (n( C = 4)∶n(O 2)=1∶2 1∶4,space velocity=180h 1 ,T=360℃),the yield of methacrolein and methacrylic reached 80%,8%,respectively.The total yields of liquid products(methacrolein,methacrylic acid and acetic acid)reached about 90%.
文摘Nitrogen monoxide(NO) emitted from automobile exhaust and other industrial sources contributes largely to a variety of environmental problems, such as the formation of acid rain and photochemical smog Therefore, the catalytic reduction of NO has become one of the urgent environmental issues In the present study, a series of Au/Mn 2O 3/Al 2O 3 catalysts, with different Mn 2O 3 loadings, were prepared by deposition precipitation The crystallite size of Au before and after reaction was characterized by XRD The activity of catalysts in the selective catalytic reduction of NO using propane in the presence of oxygen was evaluated It is found that the catalytic activity of Au/Mn 2O 3/Al 2O 3 is higher than that of Au/Al 2O 3 and Cu ZSM 5 at feed gas(0 6%NO+1 2%C 3H 8+5%O 2+He) and GHSV 5?000?h
