采用并流共沉淀法制备了不同Al含量的Cu/ZnO/Al2O3催化剂(Cu/Zn=1,Al 4～24 mol%),对其进行XRD、DSC和TPR表征,并在焦炉煤气制氢的模拟重整气氛下(H2:CO:CO2=0.75:0.06:0.19)进行活性评估.研究发现,适量Al含量的催化剂前驱体具有协同催化效应,可以大大提高其低温变换活性.产生协同作用的原因可能是在前驱体制备过程中,部分绿铜锌相渗入水滑石相的层间距,并同化了部分的水滑石结构为绿铜锌矿结构,从而增强了催化剂活性中心的低温变换性能,在本试验的Al考察范围内(4～24 mol%),最佳Al添加量为12 mol%.
参考文献
| [1] | Spivey J J .Catalysis in the development of clean energy technologies[J].Catalysis Today,2005,100:171. |
| [2] | Suh D J;Kwak C;Kim J H et al.Removal of carbon monoxide from hydrogen-rich fuels by selective low-temperature oxidation over base metal added platinum catalysts[J].Journal of Power Sources,2005,142:70. |
| [3] | Gines MJL.;Laborde M.;Apesteguia CR.;Amadeo N. .ACTIVITY AND STRUCTURE-SENSITIVITY OF THE WATER-GAS SHIFT REACTION OVER CU-ZN-AL MIXED OXIDE CATALYSTS[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,1995(2):283-296. |
| [4] | Newsome,David S .Water-gas shift reaction[J].Catalysis Review:Science and Engineering,1980,21(02):275. |
| [5] | Koryabkina NA.;Phatak AA.;Ruettinger WF.;Farrauto RJ.;Ribeiro FH. .Determination of kinetic parameters for the water-gas shift reaction on copper catalysts under realistic conditions for fuel cell applications[J].Journal of Catalysis,2003(1):233-239. |
| [6] | Nishida K;Atake I;Li D L et al.Effects of noble metal-doping on Cu/ZnO/Al2O3 catalysts for water-gas shift reaction[J].Applied Catalysis A:General,2008,337:48. |
| [7] | Fierro G;Jacono M L;Inversi M et al.Study of the reducibility of copper in CuO-ZnO catalysts by temperature-programmed reduction[J].Applied Catalysis A:General,1996,137:327. |
| [8] | Atake I;Nishida K;Li D L et al.Catalytic behavior of ternary Cu/ZnO/Al2O3 systems prepared by homogeneous precipitation in water-gas shift reaction[J].Journal of Molecular Catalysis A:Chemical,2007,275:130. |
| [9] | Effective MgO surface doping of Cu/Zn/Al oxides as water-gas shift catalysts[J].Applied clay science,2009(3/4):211-217. |
| [10] | Klier K .Structure and function of real catalysts[J].Applied Surface Science,1984,19(1-4):267. |
| [11] | Spencer M S .The role of zinc oxide in Cu/ZnO catalysts for methanol synthesis and the water-gas shift reaction[J].Topics in Catalysis,1999,8:259. |
| [12] | Hadden R A;Lambert P J;Ranson C .Relationship between the copper surface area and the activity of CuO/ZnO/Al2O3 water-gas shift catalysts[J].Applied Catalysis A:General,1995,122:L1. |
| [13] | Ressler T;Kniep B L;Kasatkin I et al.The microstructure of Copper Zinc Oxide Catalysts:Bridging the Materials Gap[J].Angewandte Chemie,2005,44:4704. |
| [14] | 房德仁,刘中民,杨越,孟霜鹤,索掌怀,陈峰.沉淀温度对CuO/ZnO/Al2O3催化剂前驱体物相及催化水煤气变换反应活性的影响[J].催化学报,2004(11):920-924. |
| [15] | Sengupta G.;Sharma VB.;Mishra KK.;Kundu ML.;Sanyal RM. Dutta S.;Sharma RK. .EFFECT OF INCORPORATION OF AL+3 ION ON THE STRUCTURE OF CU-ZN COPRECIPITATE[J].International Journal of Quantum Chemistry,1995(1):204-207. |
| [16] | Turco M;Bagnasco G;Costantino U;Marmottini F;Montanari T;Ramis G;Busca G .Production of hydrogen from oxidative steam reforming of methanol - I. Preparation and characterization of Cu/ZnO/Al2O3 catalysts from a hydrotalcite-like LDH precursor[J].Journal of Catalysis,2004(1):43-55. |
| [17] | 蒋维,莫桂娣,金烈,曾和平.铈杂多配离子-水滑石超分子层柱材料ZnAl-Ce（PMoV）2的插层组装、表征及催化性能[J].中国稀土学报,2007(01):32-38. |
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