催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (1): 111-117.DOI: 10.3724/SP.J.1088.2010.00729

• 研究论文 • 上一篇    下一篇

炭包覆氧化铝负载镍催化剂的制备和表征及其催化加氢性能

李海涛, 陈昊然, 张因, 高春光, 赵永祥   

  1. 山西大学化学化工学院精细化学品教育部工程研究中心, 山西太原 030006
  • 收稿日期:2010-07-21 修回日期:2010-09-10 出版日期:2011-01-13 发布日期:2014-05-22

Preparation and Characterization of Carbon-Covered Alumina Supported Ni Catalyst and Its Catalytic Performance for Hydrogenation of 1,4-Butanediol

LI Haitao, CHEN Haoran, ZHANG Yin, GAO Chunguang, ZHAO Yongxiang*   

  1. Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, Shanxi, China
  • Received:2010-07-21 Revised:2010-09-10 Online:2011-01-13 Published:2014-05-22

PDF

1490

被引次数

55

摘要： 以炭包覆 Al2O3 (CCA) 为载体, 采用等体积浸渍法制备了 17%Ni/CCA 催化剂, 采用热重-差示量热扫描、扫描电镜、X 射线光电子能谱、N2 物理吸附、H2 程序升温还原和 X 射线衍射等手段对样品进行了表征, 并用于粗 1,4-丁二醇加氢反应中. 结果表明, 炭的引入显著改变了 Al2O3  的表面性质、负载 Ni 的存在形态以及金属-载体间的相互作用, 因而不同炭含量的 Ni/CCA 催化剂在粗 1,4-丁二醇加氢反应中表现出不同的催化活性. 当载体中炭含量为 11.6% 时, 催化剂中的 Ni 以无定形状态高度分散于载体表面, 同时具有适宜的金属-载体相互作用及较好的还原性能, 因而其加氢活性最高.

关键词: 镍, 炭包覆氧化铝, 负载型催化剂, 1,4-丁二醇, 加氢

Abstract: Carbon-covered alumina (CCA) was prepared by pyrolysis of sucrose dispersed on a γ-Al2O3 support, and 17% Ni/CCA catalyst was prepared by impregnation with CCA. Effect of carbon addition on the catalytic performance of Ni/Al2O3 was investigated for the hydrogenation of crude 1,4-butanediol aqueous solution. The catalyst samples were characterized by thermogravimetry-differential scanning calorimetry, scanning electron microscopy, X-ray photoelectron spectroscopy, N2 adsorption, H2 temperature-programmed reduction, and X-ray diffraction. The results indicated that the addition of carbon resulted in the changes in the surface properties of the support, the nickel dispersion, and metal-support interaction of the catalyst, leading to different hydrogenation activity of the catalyst. When the carbon loading was 11.6%, the catalyst sample showed the highest nickel dispersion, the mild metal-support interaction and the highest activity for the hydrogenation of crude 1,4-butanediol solution.

Key words: nickel, carbon-covered alumina, supported catalyst, 1,4-butanediol, hydrogenation