LI Hai-tao, CHEN Hao-ran, ZHANG Yin, GAO Chun-guang, ZHAO Yong-xiang
(Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, Shanxi, China)
Abstract: Carbon-covered alumina (CCA) was prepared by the pyrolysis of the sucrose dispersed on a γ-Al2O3 support. And 17% loading Ni supported catalysts were prepared by impregnation method. Effect of carbon addition on Ni/Al2O3 catalytic performance was investigated for the hydrogenation of maleic anhydride (MA) to butyrolactone (GBL). The samples were characterized by TPO-MS, N2 adsorption, TPR and XRD. The results indicated that the addition of carbon resulted in the change of the surface property of Al2O3 support, the Ni dispersion and metal-support interaction of the catalysts. This makes the catalysts showed different hydrogenation activity. When the carbon loading was about 8.9%, the catalyst showed the highest Ni dispersion and the mild metal-support interaction. The catalyst exhibited the highest selectivity of GBL for the hydrogenation of MA. At conditions of 210 °C, 5 MPa hydrogen pressure and reaction time 3h, the conversion of MA was above 98% and the selectivity of GBL was 91.71 %。
Key words: Carbon-Covered Alumina; Ni supported catalyst; Hydrogenation; Maleic anhydride; Butyrolactone
E-mail: yxzhao@sxu.edu.cn
Journal of Molecular Catalysis, Vol. 24, Issue 5, 2010, 411~416
