以甲烷催化燃烧为目标反应, 考察了CuO/CeO2催化材料的催化活性, 研究了催化材料中铜含量, 制备方法及焙烧温度对催化活性的影响. 结果表明, CuO/CeO2催化材料对甲烷燃烧反应呈现出较高催化活性, 适当温度下焙烧催化剂有利于提高催化剂的催化活性. 随着催化剂中氧化铜含量的改变, 甲烷完全燃烧的温度改变较大. 对于浸渍法样品, 当CuO% (质量分数)>13.0% 时, 复合物本体有CuO晶相出现, 而不是以高分散形式分布在复合物表面, 导致催化活性下降, 完全燃烧温度升高. 最佳CuO含量CuO% 约为8.0%.
参考文献
[1] | Choudhary T V;Banerjee S;Choudhary V R .Catalysts for combustion of methane and lower alkanes[J].Applied Catalysis A:General,2002,234:1. |
[2] | Spinicci R;Tofanari A;Faticanti M et al.Hexane total oxidation on LaMO3 (M=Mn,Co,Fe) Perovskite-type oxides[J].Journal of Molecular Catalysis A:Chemical,2001,176:247. |
[3] | 郭耘,舒勇华,崔梅生,张国成,黄小卫,李红卫,张炜.BaO对Pd/Al2O3上CH4催化燃烧性能的影响[J].中国稀土学报,2002(z1):79-81. |
[4] | Meng Feiluo;Yi Junzhong;Xian Xinyuan et al.TPR and TPD studies of CuO/CeO2 catalysts for low temperature CO oxidation[J].Applied Catalysis A:General,1997,162(01):121. |
[5] | Liu W.;Flytzanistephanopoulos M. .TOTAL OXIDATION OF CARBON MONOXIDE AND METHANE OVER TRANSITION METAL-FLUORITE OXIDE COMPOSITE CATALYSTS .1. CATALYST COMPOSITION AND ACTIVITY[J].Journal of Catalysis,1995(2):304-316. |
[6] | Kundakovic L.;Flytzani-Stephanopoulos M. .Cu- and Ag-modified cerium oxide catalysts for methane oxidation[J].Journal of Catalysis,1998(1):203-221. |
[7] | Bunluesin T;Gorte R et al.CO oxidation for the characterization of reducibility in oxygen storage components of three-way automotive catalysts[J].Applied Catalysis B:Environmental,1997,14(02):105. |
[8] | Liu W.;Flytzanistephanopoulos M. .TOTAL OXIDATION OF CARBON MONOXIDE AND METHANE OVER TRANSITION METAL-FLUORITE OXIDE COMPOSITE CATALYSTS .2. CATALYST CHARACTERIZATION AND REACTION KINETICS[J].Journal of Catalysis,1995(2):317-332. |
[9] | 刘源,孙海龙,刘全生,金恒芳.氧化铈气凝胶担载氧化铜催化剂上的一氧化碳氧化反应[J].催化学报,2001(05):453-456. |
[10] | 刘源,孙海龙,刘全生,金恒芳.氧化铈气凝胶担载氧化铜催化剂的TPR研究[J].催化学报,2001(06):523-526. |
[11] | 董林;金永漱;陈懿 等.CuO在CeO2载体上的存在状态研究[J].中国科学B辑,1996,26(06):561. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%