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以γ-Al2O3为载体,采用常规浸渍法制备了负载型CuCl2-KCl-LaCl3三组分催化剂,并研究了其对乙烷氧氯化反应的催化性能. 结果表明,该催化体系中乙烷的转化率较稳定,但随着反应时间的延长,氯乙烯的选择性和收率明显下降. XRD,N2吸附,TGA/DTA和XPS测试结果表明,随着反应的进行,催化剂中的活性物种Cu2+逐渐被还原成Cu+,并且积炭的产生使催化剂的比表面积和孔容积减小. 活性物种Cu2+的减少及比表面积的降低是催化剂失活的主要原因.

参考文献

[1] Allen J A;Clark A J .[J].Reviews of Pure and Applied Chemistry,1971,21(02):145.
[2] Kenney C N .[J].Catalysis Review-Science and Engineering,1975,11(02):197.
[3] Villadsen J;Livbjerg H .[J].Catalysis Review-Science and Engineering,1978,17(02):203.
[4] Leach B E.Applied Industrial Catalysis[M].New York:Academic Press,1983:239.
[5] 易华,徐明霞,景晓燕.氯乙烯的生产技术及产需现状[J].化学工程师,2001(04):39,64.
[6] Kroenke W J;Nicholas P P .[P].US:4375569,1983.
[7] Pyke D R;Reid R .GB 2 095 245[P].GB2 095 245,1982.
[8] Clegg I M;Hardman R .[P].US:5763710,1998.
[9] 冯海强 .[J].石油化工,2001,30(zk):292.
[10] 吕学举,费强,程铁欣,毕颖丽,甄开吉,张春雷,崔元俊.乙烷氧氯化制氯乙烯的研究[J].高等学校化学学报,2003(03):522-524.
[11] Grasselli R K;Oyama S T;Gaffney A M;Lyons J E.[A].San Diego:Elsevier Science,1997:305.
[12] Carmello D.;Marsella A.;Cremaschi B.;Leofanti G.;Padovan M.;Busca G.;Finocchio E. .An FT-IR and reactor study of the dehydrochlorination activity of CuCl2/gamma-Al2O3-based oxychlorination catalysts[J].Journal of Catalysis,2000(2):354-363.
[13] Finocchio E.;Busca G.;Padovan M.;Leofanti G.;Cremaschi B. Marsella A.;Carmello D.;Rossi N. .Characterization and catalytic activity of CuCl2-Al2O3 ethylene oxychlorination catalysts[J].Journal of Catalysis,1998(2):606-618.
[14] Leofanti G.;Garilli M.;Carmello D.;Zecchina A.;Spoto G. Bordiga S.;Palomino GT.;Lamberti C.;Padovan M. .Alumina-supported copper chloride 1. Characterization of freshly prepared catalyst[J].Journal of Catalysis,2000(1):91-104.
[15] Weast R C;Astle M J.Handbook of Chemistry and Physics[M].Florida:CRC Press,1982
[16] 李兴林;张瑞峰 .[J].光谱学与光谱分析,1996,16(03):119.
[17] Prasad PSS.;Rao PK.;Kaushik VK.;Prasad KBS. .REDISTRIBUTION OF COPPER IN KCL-PROMOTED CUCL2/GAMMA-AL2O3 CATALYST DURING OXYCHLORINATION OF ETHYLENE[J].Journal of Materials Science,1997(6):1479-1482.
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