物理化学学报 >> 1998, Vol. 14 >> Issue (07): 635-639.doi: 10.3866/PKU.WHXB19980712

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γ-Al2O3对NiB合金的催化及表面性能的影响

石秋杰, 李凤仪, 罗来涛   

  1. 华南理工大学化工系，广州 510641|南昌大学近代应用化学研究所，南昌 330047
  • 收稿日期:1997-09-08 修回日期:1997-12-01 发布日期:1998-07-15
  • 通讯作者: 李凤仪

Effect of γ-Al2O3 on the Catalytic and Surface Properties of NiB Alloy

Shi Qiu-Jie, Li Feng-Yi, Luo Lai-Tao   

  1. Department of Chemical Engineering,Southchina University of Technology,Guangzhou 510641|Institute of Modern Applied Chemistry,Nanchang University,Nanchang 330047
  • Received:1997-09-08 Revised:1997-12-01 Published:1998-07-15
  • Contact: Li Feng-Yi

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关键词: 三氧化二铝, 非晶态NiB合金, 苯加氢, 表面性能

Abstract:

The pulse microreaction technique was used to examine the effect of addition of alumina on the catalytic and surface properties of amorphous NiB alloy. Gas-phase hydrogenation of benzene was chosen as probe reaction. The structure, composition and crystallization were determined by XRD, ICP and DSC, respectively. The surface properties were characterized by TPR and TPD. The results indicated that, addition of alumina increased the activity, thermal stability, and sulfur resisting property of NiB alloy. Comparing the two kinds of methods of addition, impregnation was superior to mechanically mixing. The result of the dynamic studies on pulse reaction showed that benzene hydrogenation over amorphous NiB alloy, NiB+Al2O3, NiB-Al2O3 followed Langmuir-Hinshsood model, the sequence of activation energy over the samples was as follows :Ea(NiB)> Ea(NiB+Al2O3)> Ea(NiB-Al2O3). The results of TPR and TPD indicated that addition of alumina decrease the types of absorbing sites, but increase the amount of absorbtion obviously.

Key words: Alumina, Amorphous NiB alloy, Benzene hydrogenation, Surface propertity