以柠檬酸溶胶-凝胶法、六亚甲基四胺共沉淀法和草酸共沉淀法合成了具有萤石结构的Ce0.8Gd0.2O1.9(CGO)复合氧化物,并用初湿浸润法制备了负载型Pt/CGO催化剂. 纯异辛烷的重整反应结果显示,制得的催化剂均达到了热力学平衡转化. 抗硫测试表明,用柠檬酸溶胶-凝胶法所制载体制备的催化剂具有最好的抗硫中毒性能,在300 ìg穏-1硫存在条件下,100 h内异辛烷均接近完全转化. 用六亚甲基四胺共沉淀法和草酸共沉淀法所制载体制备的催化剂,在相同硫含量条件下,100 h后异辛烷的转化率分别降至～90%和～82%. 这主要是由于二者热稳定性较差和Pt与CGO复合氧化物载体之间相互作用较弱所致. 催化剂储氧量与其抗硫中毒性能并无直接关联. 另外,3种催化剂均具有良好的抗积炭性能.
参考文献
| [1] | Avci K A;Onsan Z A;Trimm D L .On-board fuel conversion for hydrogen fuel cells:comparison of different fuels by computer simulations[J].Applied Catalysis A:General,2001,216(1-2):243. |
| [2] | Moon D J;Sreekumar K;Lee S D;Lee B G,Kim H S .Gasoline fuel processor system for fuel-cell powered vehicles application[J].Applied Catalysis A:General,2001,215(1-2):1. |
| [3] | Rostrup-Nielsen J R .Sulfur-passivated nickel catalysts for carbon-free steam reforming of methane[J].Journal of Catalysis,1984,85(01):31. |
| [4] | Bartholomew CH. .Mechanisms of catalyst deactivation [Review][J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2001(1/2):17-60. |
| [5] | Ayabe S;Omoto H;Utaka T;Kikuchi R,Sasaki K,Teraoka Y,Eguchi K .Catalytic autothermal reforming of methane and propane over supported metal catalysts[J].Applied Catalysis A:General,2003,241(1-2):261. |
| [6] | Anca Faur Ghenciu .Review of fuel processing catalysts for hydrogen production in PEM fuel cell systems[J].Current opinion in solid state & materials science,2002(5):389-399. |
| [7] | Ming Q;Healey T;Allen L;Irving P .Steam reforming of hydrocarbon fuels[J].Catalysis Today,2002,77(01):51. |
| [8] | Krumpelt M;Krause T R;Carter J D;Kopasz J P,Ahmed S .Fuel processing for fuel cell systems in transportation and portable power applications[J].Catalysis Today,2002,77(01):3. |
| [9] | 郭耘,卢冠忠.稀土催化材料的应用及研究进展[J].中国稀土学报,2007(01):1-15. |
| [10] | 王建梅,王榕,谢峰,林建新,俞秀金,魏可镁.稀土金属氧化物改性整体式钌基氨合成催化剂的制备和性能的研究[J].中国稀土学报,2006(06):666-670. |
| [11] | 陈金春,刘晔,路勇,薛青松,高立达,王亚,何鸣元.含硫液体烃燃料水蒸气重整制氢Ⅰ.Pt/Ce0.8Gd0.2O1.9催化剂的制备、表征和抗硫性能[J].催化学报,2007(02):131-136. |
| [12] | Yao H C;Yao Y F Y .Ceria in automotive exhaust catalysts:I.Oxygen storage[J].Journal of Catalysis,1984,86(02):254. |
| [13] | Gary Jacobs;Uschi M.Graham;Emilie Chenu;Patricia M.Patterson;Alan Dozier;Burtron H.Davis .Low-temperature water-gas shift;impact of Pt promoter loading on the partial reduction of ceria and consequences for catalyst design[J].Journal of Catalysis,2005(2):499-512. |
| [14] | Lu Y;Chen J C;Xue Q S;Liu Y,He M Y .High sulfur-tolerant Pt/doped-CeO2 catalyst for liquid hydrocarbon fuel processing[J].Studies in Surface Science and Catalysis,2007,172:273. |
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%