催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (8): 955-960.

• 研究快讯 • 上一篇    下一篇

Pt-Ni/γ-Al2O3 双金属催化剂上1,3-环己二烯的低温加氢和脱氢反应

齐随涛1,2, 俞伟婷2, William W. LONERGAN2, 杨伯伦1, 陈经广2   

  1. 1西安交通大学能源与动力工程学院化学工程系, 动力工程多相流国家重点实验室, 陕西西安 710049 2特拉华大学化学工程系催化科学与技术研究中心, 纽瓦克, 特拉华州 19716, 美国
  • 收稿日期:2010-04-08 出版日期:2010-08-30 发布日期:2013-12-26
  • 通讯作者: Chen Jingguang G

Low-Temperature Hydrogenation and Dehydrogenation of 1,3-Cyclohexadiene on Pt/Ni Bimetallic Catalysts

QI Suitao1,2, YU Weiting2, William W. LONERGAN2, YANG Bolun1, CHEN Jingguang G2,*   

  1. 1State Key Laboratory of Multiphase Flow in Power Engineering, Department of Chemical Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China 2Department of Chemical Engineering, Center for Catalytic Science and Technology (CCST), University of Delaware, Newark, DE 19716, USA
  • Received:2010-04-08 Online:2010-08-30 Published:2013-12-26

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摘要： 采用等体积浸渍法制备了 γ-Al2O3 负载的 Pt 和/或 Ni 双金属催化剂或单金属催化剂, 测定了它们的 CO 化学吸附量, 并在原位红外间歇反应装置上评价了其催化 1,3-环己二烯 (1,3-CHD) 的低温 (308 K) 加氢和脱氢性能. 结果表明, Pt-Ni/γ-Al2O3 催化剂性能优于 Pt/γ-Al2O3 或 Ni/γ-Al2O3. 结合密度泛函理论计算的不同催化剂上 1,3-CHD 的表面吸附能, 验证了具有较弱环烯烃吸附能的双金属催化剂加氢活性较高.

关键词: 双金属, 铂, 镍, 氧化铝, 负载型催化剂, 1,3-环己二烯, 加氢, 脱氢, 密度泛函理论

Abstract: Pt-Ni bimetallic catalysts and their corresponding monometallic catalysts supported on γ-Al2O3 were prepared by incipient wetness impregnation and characterized by CO chemisorption. Their low-temperature activity for the hydrogenation and dehydrogenation of 1,3-cyclohexadiene (1,3-CHD) was tested at 308 K in a batch reactor using Fourier transform infrared spectroscopy. The Pt-Ni/γ-Al2O3 bi-metallic catalyst showed higher activity than either Pt/γ-Al2O3 or Ni/γ-Al2O3. We correlated the experimental results with density functional theory calculations of the binding energy for 1,3-CHD on the corresponding model surfaces. The correlation confirmed that bimetallic sur-faces with weaker cycloalkene binding energy generally showed higher hydrogenation activity.

Key words: bimetallic, platinum, nickel, alumina, supported catalyst, 1,3-cyclohexadiene, hydrogenation, dehydrogenation, density functional theory