TiO_2担载镍催化剂上硝基苯液相加氢(英文)

查看全文 作　　者：K.Joseph Antony [1]RAJ;[1,2]M.G.PRAKASH;[2]R.MAHALAKSHMY;[1]T.ELANGOVAN;[1]B.VISWANATHAN

机构地区：[1]National Centre for Catalysis Research, Indian Institute of Technology-Madras, Chennai 600036, India;[2]PG & Research Department of Chemistry, Thiagarajar College, Madurai 625009, India

出　　处：《催化学报》索引2012年第33卷第8期,共7页

基　　金：supported by Department of Science and Technology,Government of India 摘　　要：The catalytic hydrogenation of nitrobenzene to aniline employing nickel impregnated on rutile,anatase,and high surface area titania supports has been investigated.The nickel is present in elemental state as fcc phase on the catalyst as evidenced by X-ray diffraction results.The Ni crystallite size was found to be greater for Ni/anatase.The temperature-programmed reduction results suggest a greater metal-support interaction for Ni/rutile.The observed order of catalytic activity for the hydrogenation of nitrobenzene is Ni/rutile > Ni/anatase > Ni/TiO2.A conversion of 99% was observed for Ni/rutile at 140 oC and hydrogen pressure of 1.96 MPa.Interestingly,aniline is the only product formed which demonstrates the catalytic hydrogenation of nitrobenzene proceeds with atom economy.Both Ni/rutile and Ni/anatase exhibited a better stability than Ni/TiO2.The hydrogenation proceeds with the preferential adsorption of hydrogen on nickel present in the catalyst surface,possibly assisted by TiOx species. 关键词：HYDROGENATION NITROBENZENE NICKEL TITANIA ANILINE

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TiO_2担载镍催化剂上硝基苯液相加氢(英文)

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