物理化学学报 >> 1996, Vol. 12 >> Issue (12): 1079-1083.doi: 10.3866/PKU.WHXB19961206

研究论文 上一篇    下一篇

结晶度对ZGDMP-Pd催化剂加氢活性的影响

傅相锴,马学兵,温淑英,刘昌华   

  1. 西南师范大学化学化工学院,重庆 630715
  • 收稿日期:1996-04-15 修回日期:1996-08-20 发布日期:1996-12-15
  • 通讯作者: 傅相锴

Study on the Crystallinity of ZGDMP and the Catalytic Activities of ZGDMP-Pd Catalysts for Hydrogenation

Fu Xiang-Kai,Ma Xue-Bing,Wen Shu-Ying,Liu Chang-Hua   

  1. College of Chemistry and Chemical Engineering,Southwest-China Normal University,Chongqing 630715
  • Received:1996-04-15 Revised:1996-08-20 Published:1996-12-15
  • Contact: Fu Xiang-Kai

摘要:

首次制得不同结晶度的晶态、半晶态和无定形甘氨酸-N•N-双亚甲基膦酸锆(ZGDMP)载体和相应的钯催化剂ZGDMP-Pd,用IR、XRD、XPS对它们进行了表征.测定了三种催化剂在常压下进行加氢反应的催化活性.发现无定形载体钯催化剂分别比晶态和半晶态钯催化剂活性高3.1倍和1.9倍. 晶态和半晶态钯催化剂低活性是由于络合Pd前后层间距无变化,催化剂中的Pd只在载体表面络合,载体层间内部的甘氨酸基团对组合和催化作用没有贡献.

关键词: 甘氨酸-N, N-双亚甲基膦酸锆, 钯催化剂, 结晶度, 加氢, 催化活性

Abstract:

Crystalline, semicrystalline and amorphous catalyst supports ZGDMP (zirconium glycine-N•N-dimethylphosphonate) and their corresponding c-ZGDMP-Pd, s-ZGDMP-Pd, a-ZGDMP-Pd catalysts were prepared and characterized by IR、 XRD、XPS for the first time. The catalytic activity of these Pd catalysts for hydrogenation under atmospheric pressure were also studied. It was discovered that the activity of a-ZGDMP-Pd is 3.1 times as high that of c-ZGDMP-Pd catalyst and 1.9 times as that of s-ZGDMP-Pd for hydrogenation. The lower catalytic activity of c-ZGDMP-Pd and s-ZGDMP-Pd is due to no changes of the interlayer distance between the support and the corresponding Pd catalysts, Pd undergoes complexation only on the surface of the support in the catalysts, the glycine groups in the inner layers of the support have no contribution to the complexation and catalytic effects.

Key words: Zirconium glycine-N, N-dimethylphosphonate, Pd catalyst, Crystallinity, Hydrogenation, Catalytic activity