Effects of the preparation methods on the properties of Ni-La2O3-SiO2 catalysts for m -dinitrobenzene hydrogenation |
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| Authors: | Yingxin Liu Zuojun Wei Jiyan Zhang and Wei Yan |
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| Institution: | (1) College of Pharmaceutical Science, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310032, PR China;(2) Institute of Pharmaceutical Engineering, College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou, 310027, PR China;(3) Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, PR China |
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| Abstract: | Ni-La2O3-SiO2 catalysts were prepared by wetness impregnation and sol-gel method followed by conventional drying and supercritical drying,
respectively. Their physico-chemical properties and activity for the hydrogenation of m-dinitrobenzene to m-phenylenediamine were investigated by BET, XRD, TPR, H2-TPD and activity tests. The results showed that the structural and catalytic properties of the Ni-La2O3-SiO2 catalysts obviously depended on the preparation method and the drying mode. The catalyst prepared by the sol-gel method in
combination with conventional drying exhibited the highest catalytic activity among the catalysts tested, attributable to
its well-dispersed nickel particles and larger active nickel surface area. |
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| Keywords: | Sol-gel impregnation Ni-La2O3-SiO2 catalyst m-dinitrobenzene hydrogenation |
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