首次采用聚乙二醇凝胶法制备了Co系类钙钛矿LnSrCoO4(Ln=La,Pr,Nd,Sm,Eu) 复合氧化物,研究了稀土对催化剂的结构和催化性能的影响,考察了它们对 CO和C3H8 的氧化反应活性,并运用XRD、BET、TPD等方法对催化剂进行了表征.结果表明:该类复合氧化物具有K2NiF4结构,它们的结构和催化性能随稀土不同而变化,其中以LaSrCoO4催化活性最好,这是由LaSrCoO4的晶格氧更易移动、Co3+离子含量更高,氧空位和反应时化学吸附氧更多所致.
参考文献
| [1] | Luo L;Li F;Wang M .Role of MoO3 and La2O3 promoters in Ni-catalyzed methanation reaction of CO[J].Journal of Natural Gas Chemistry,1994,3(03):339-347. |
| [2] | Cheng S;Li F;Luo L et al.Electronic modification effect of rare earth oxide upon Pt-Dy/Al2O3 catalysts[J].Reaction Kinetics and Catalysis Letters,1992,48(02):437-445. |
| [3] | Yang Z;Chen X;Niu G et al.Comparison of effect of La-modification on the thermo-stabilities alumina and alumina-supported Pd catalysts prepared from different alumina sources[J].Applied Catalysis,2001,29:185-194. |
| [4] | Luo L;Li S;Li F et al.Studies on the surface behavior of non-chromium type high-temperature CO shift catalysts[J].Reaction Kinetics and Catalysis Letters,1998,65(01):199-205. |
| [5] | 刘新华;苗茵;李晓丽 .La2O3对Ni/γ-Al2O3甲烷化催化材料的助催化作用[J].物理化学学报,1995,11(08):746-749. |
| [6] | Damyanova S.;Fierro JLG.;Daza L. .SURFACE AND CATALYTIC PROPERTIES OF LANTHANUM-PROMOTED NI/SEPIOLITE CATALYSTS FOR STYRENE HYDROGENATION[J].Journal of Catalysis,1996(1):150-161. |
| [7] | Luo Laitao,Li Songjun,Guo Jianjun,Deng Gengfen.STUDY OF Ni/SEPIOLITE AND Ni-Sm/SEPIOLITE CATALYSTS[J].天然气化学(英文版),2001(01):51-60. |
| [8] | Ganguli D .Cationic radius ratio and formation of K2NiF4-type compounds[J].Journal of Solid State Chemistry,1979,30:353-356. |
| [9] | 楼辉.La2-XSrXNiO4上氧的TPD及其氧化活性[J].高等学校化学学报,1995(01):107. |
| [10] | 高利珍;李庆生;吴越 等.La2-xSrxNiO4-λ系列催化材料结构与氨氧化活性的关系[J].化学学报,1996,54:234-241. |
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%