探针反应和FTIR法研究Pt与L型沸石的相互作用

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (12): 1754.

探针反应和FTIR法研究Pt与L型沸石的相互作用

董家禄¹, 朱建华¹, 须沁华¹, 张婕², 刘大壮²

1. 南京大学化学系, 南京, 210008;
2. 郑州工学院化工系, 郑州, 450002

收稿日期:1993-12-27 修回日期:1994-06-21 出版日期:1994-12-24 发布日期:1994-12-24
通讯作者: 张婕.
作者简介:董家禄,男,55岁,副教授.
基金资助:
国家教委优秀青年教师基金;国家自然科学基金

Investigation on Interaction of Pt and L Zeolite Using Probe Reaction and in situ FTIR

DONG Jia-Lu¹, ZHU Jian-Hua¹, XU Qin-Hua¹, ZHANG Jie², LIU Da-Zhuang²

1. Department of Chemistry, Nanjing University, Nanjing, 210008;
2. Department of Chemical, Engineering, Zhengzhou Institute of Technology, Zhengzhou, 450002

Received:1993-12-27 Revised:1994-06-21 Online:1994-12-24 Published:1994-12-24

摘要/Abstract

关键词: Pt/L沸石, 沸石催化剂, 异丙醇分解反应, Pt－载体相互作用

Abstract: The Pt dispersed on acidic HLzeolite exhibited "electronic deficiency" and did not show an obvious dehydrogenation activity in isopropanol decomposition, but enhanced the conversion of isopropanol to form H₂O and propene through the protection of the acid sites on zeolite against deactivation by carbonaceous overlayers. Pt on KLbasic zeolite, however, exhibited some electron rich and high dehydrogenation activity in isopropanol decomposition.Besides, Pt/ KLwas very sensitive to thiophene poison in the reactions. During the process of pretreatment and reaction, the Pt in the mixture of (Pt/KL+HL) migrated from KLto HL, resulting in that the catalytic properties of the mixture are similar as that of Pt/HLin decomposition of isopropanol. It was proved that there was an obvious interaction between Pt and Lzeolites. The Pt supported was easier to become " electronic deficiency" than to be "electronic rich", which meant that the interaction of Pt with acidic sites was stronger than that of Pt with basic sites because of the metallicity of Pt which can be electronic donor easily but to be the electronic accepter difficultly.

Key words: Pt/L Zeolite, Zeolite catalysts, Decomposition of isopropanol, Interaction of Pt-L zeolites.

TrendMD:

董家禄, 朱建华, 须沁华, 张婕, 刘大壮. 探针反应和FTIR法研究Pt与L型沸石的相互作用. 高等学校化学学报, 1994, 15(12): 1754.

DONG Jia-Lu, ZHU Jian-Hua, XU Qin-Hua, ZHANG Jie, LIU Da-Zhuang. Investigation on Interaction of Pt and L Zeolite Using Probe Reaction and in situ FTIR. Chem. J. Chinese Universities, 1994, 15(12): 1754.