Effects of Promoters on Structure and Properties of Ni/SiO

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Abstract A series of nickel catalyst samples supported on silica and promoted with different promoters,were prepared by incipient impregnation and used for hydrogenation of m-dinitrobenzene to m-phenylenediamine.Based on the results of nitrogen adsorption-desorption,X-ray diffraction(XRD),temperature-programmed reduction (TPR) and activity evaluation,the physico-chemical properties and catalytic performance of the catayst were investigated.It was found that promoters of La_2O_3,K_2O and Li_2O could enhance the dispersity and the reduction ability of nickel species on the catalyst of Ni/SiO_2,and so they improved the catalytic performance of the catalysts,especially double promoters of La_2O_3 and K_2O.

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Received 2005-05-15; published 2005-05-15

Cite this article:

TAO Ran,CHEN Ji-xiang,ZHANG Ji-yan .Effects of Promoters on Structure and Properties of Ni/SiO_2 Catalysts for Hydrogenation[J] Chemcial Industry and Engineering, 2005,V22(3): 175-178

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