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环境化学  2015 

还原温度对Pd-CeO2/Al2O3催化剂加氢脱硫性能的影响

Keywords: 还原温度,Pd-CeO2/Al2O3催化剂,加氢脱硫

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Abstract:

采用浸渍法制备CeO2改性的Pd/Al2O3加氢脱硫催化剂,考察了还原温度和还原-氧化预处理对Pd/Al2O3和Pd-CeO2/Al2O3催化剂加氢脱硫性能的影响.结果表明,Pd/Al2O3的活性受还原温度的影响很小.Pd-CeO2/Al2O3还原温度的升高使CeO2发生迁移,导致催化剂表面Pd原子数减少,同时削弱了Pd-Ce界面效应,从而使催化剂的活性降低.还原-氧化预处理使Pd-CeO2/Al2O3的活性有较大提高,预处理能促使Pd的再分散,增加了对H2的吸附活化能力,在Pd-Ce的界面效应共同作用下使催化剂拥有较高的活性.

References

[1]  刘振宇,牛宏贤,朱珍平等,SO2在Co-Mo/AC催化剂上的还原[J]. 环境化学,1999,18(6): 519-524
[2]  闵恩泽,环境友好石油炼制技术的进展[J]. 化工进展,1998,10(2): 207-214
[3]  Babich I V,Moulijn J A,Science and technology of Novel Processes for deep desulfurization of Oil Refinery STreams: A Review[J]. Fuel,2003,82(6): 607-631
[4]  鲁勋,罗来涛,程新孙,Pd-CeO2/Al2O3催化剂的加氢脱硫性能[J]. 石油化工,2007,36(5): 461-466
[5]  Montero R d S,Noronha F B,dIeguez L C,Characterization of Pd-CeO2 Interaction on Alumina Support and Hydrosenation of 1,3butadiene[J]. Appl. Catal. A,1995,131(1): 89-106
[6]  Meriaudeau P,Ellestad O H,dufaux M et al. ,Metal-Support Interaction. Catalytic Properties of tiO2-Supported Platinum,Iridium,and Rhodium[J] J. Cata. ,1982,75(2): 243-250
[7]  kili k,Normand F L,Modification of the Catalytic Properties of Palladium by Rare Earth(La,Ce)Addition Catalytic Activity and Selectivity in Hydrocarbon Conversion[J]. J. Mol. Catal. ,A,1999,140(3): 267-285
[8]  潘建,朱德庆,何奥平等,一步法烟气浸锰-脱硫的工艺参数及机理[J]. 环境化学,2006,25(5): 607-610
[9]  kepinski L,Wolcyrz M,Spreading and Phase Tramformations in Highly dispersed CeO2/SiO2 and Pd/CeO2/SiO2 Systems[J]. J. Sol. Stat. Chem,1997,131(1): 121-130
[10]  tauster S J,Fung S C,Garten R L,STrong Metal-Support Interactions. Group 8 Noble Metals Supported on titanium dioxide[J]. J. Am. Chem. Soc,1978,100(1): 170-175
[11]  Montelro R S,dieguez L C,Sclunal M,the Role of Pd Precursors in the Oxidation of Carbon Monoxide over Pd/Al2O3 and Pd/CeO2/Al2O3 Catalysts. [J]. Catal. today,2001,65(1): 77-89
[12]  Feio L S F,Hori C E,damyanova S et al. ,the Effect of Ceria Content on the Properties of Pd/CeO2/Al2O3 Catalysts for Steam Reforming of Methane. [J]. Appl. Catal. A: Gen. ,2007,316(1): 107-116
[13]  katada N,Igi H,kim J H et al. ,determination of the Acidic Properties of Zeolite by theoretical Analysis of temperature-Programmed desorption of Ammonia Based on Adsorption Equilibrium[J]. J. Phys. Chem. B,1997,101(31): 5969-5977
[14]  Normand F L,Hilaire L,krill G,Oxidation State of Cerium-Based Catalysts Investigate by SpecTroscopic Probes[J] Phy. Chem. ,1988,92: 2561-2568

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