物理化学学报 >> 2010, Vol. 26 >> Issue (12): 3273-3277.doi: 10.3866/PKU.WHXB20101216

催化和表面结构 上一篇    下一篇

ZrO2负载Pt 催化巴豆醛选择性加氢

郑海影, 谢冠群, 王晓霞, 金凌云, 罗孟飞   

  1. 浙江师范大学物理化学研究所, 浙江省固体表面反应化学重点实验室, 浙江金华321004
  • 收稿日期:2010-07-16 修回日期:2010-09-19 发布日期:2010-12-01
  • 通讯作者: 罗孟飞 E-mail:mengfeiluo@zjnu.cn
  • 基金资助:

    浙江省自然科学基金(Y4100300)资助项目

Selective Hydrogenation of Crotonaldehyde over ZrO2-Supported Pt Catalysts

ZHENG Hai-Ying, XIE Guan-Qun, WANG Xiao-Xia, JIN Ling-Yun, LUO Meng-Fei   

  1. Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang Province, P. R. China
  • Received:2010-07-16 Revised:2010-09-19 Published:2010-12-01
  • Contact: LUO Meng-Fei E-mail:mengfeiluo@zjnu.cn
  • Supported by:

    The project was supported by the Zhejiang Provincial Natural Science Foundation (Y4100300).

摘要:

以高比表面积ZrO2为载体, 采用浸渍法制备了负载型Pt 催化剂, 应用于常压下气相巴豆醛加氢反应,考察了Pt 负载量和H2还原温度等对巴豆醛选择性加氢性能的影响. 实验结果表明, Pt 负载量(质量分数)为3%的3Pt/ZrO2催化剂经500 ℃还原后, 具有较高的巴豆醛选择性加氢性能: 巴豆醛转化率为27%, 巴豆醇的选择性为55%. X射线粉末衍射(XRD)分析, CO化学吸附, NH3程序升温脱附(NH3-TPD)表征结果表明Pt/ZrO2催化剂上Lewis强酸中心和适宜的Pt颗粒(约为8 nm)有利于巴豆醛选择性加氢生成巴豆醇.

关键词: 加氢, Pt/ZrO2催化剂, 高比表面积ZrO2, 巴豆醇, Lewis酸, Pt粒子大小

Abstract:

Pt catalysts supported on high specific surface area ZrO2 were prepared by the impregnation method and applied to the hydrogenation of crotonaldehyde in the gas phase at atmospheric pressure. The effects of Pt loading and reduction temperature on the catalytic properties of the Pt/ZrO2 catalysts were investigated. It was found that the 3Pt/ZrO2 catalyst with a mass fraction of 3% Pt and at a reduction temperature of 500 °C exhibited favorable catalytic performance for the selective hydrogenation of crotonaldehyde. The selectivity for crotyl alcohol reached 55% at 27% crotonaldehyde conversion. The catalysts were characterized by X-ray powder diffraction (XRD), CO chemisorption, and NH3 temperature programmed desorption (NH3-TPD). The results indicated that the catalytic performance depended on the strong Lewis acidic sites on the catalyst surface and a proper Pt particle size of ca 8 nm for the selective hydrogenation of crotonaldehyde to crotyl alcohol.

Key words: Hydrogenation, Pt/ZrO2 Catalyst, High specific surface area ZrO2, Crotyl alcohol, Lewis acid, Particle size of Pt

MSC2000: 

  • O643