Modifications induced by potassium addition on chromia/alumina catalysts and their influence on the catalytic activity for the oxidative dehydrogenation of propane

被引：37
|
作者：
Rombi, E. [1 ]
Gazzoli, D.
Cutrufello, M. G. [1 ]
De Rossi, S. [2 ]
Ferino, I. [1 ]
机构：
[1] Univ Cagliari, Dipartimento Sci Chim, I-09042 Monserrato, CA, Italy
[2] Univ Roma La Sapienza, Dipartimento Chim, CNR, ISC,UOS Mat Inorgan & Catalisi Eterogenea, I-00185 Rome, Italy
来源：
APPLIED SURFACE SCIENCE | 2010年 / 256卷 / 17期
关键词：
Propane; Oxidative dehydrogenation; Chromia/alumina; Acidity; Potassium; OXIDE-BASED CATALYSTS; CHROMIUM; ALUMINA; CR2O3; SPECTROSCOPY; REDUCIBILITY; CR2O3/AL2O3; ISOBUTANE; ALKANES;
D O I：
10.1016/j.apsusc.2009.12.151
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The oxidative dehydrogenation of propane was investigated on K-containing chromia/alumina catalysts, with nominal Cr and K loadings of 10 and 0-2 wt%, respectively. Their chemical composition, structure, texture, nature of surface species, redox features and surface acidity were determined. Catalytic behaviour was investigated in a continuous-flow micro-reactor under different conditions. Besides the nature and concentration of the chromium species, potassium addition was found to affect the reducibility of the catalysts as well as their acid surface features. Such modifications were found to condition the catalytic behaviour, which appeared somewhat peculiar in comparison with that of the catalytic systems reported in literature. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：5576 / 5580
页数：5
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