Methane combustion over pd supported on MCM-41

被引:28
作者
Ruiz, Juan A. C.
Fraga, Marco A.
Pastore, Heloise O.
机构
[1] MCT, Inst Nacl Tecnol, Lab Catalise, BR-21081312 Rio De Janeiro, Brazil
[2] Univ Estadual Campinas, UNICAMP, Inst Quim, BR-13084971 Campinas, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
MCM-41; methane combustion; PdO reducibility; natural gas;
D O I
10.1016/j.apcatb.2007.05.015
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
This work aimed at studying the feasibility of using mesoporous molecular sieves (MCM-41) as supports for palladium-based catalysts for methane combustion. The effects brought about by the chemical composition as well as by the presence of cerium and lanthanum were investigated. The MCM-41 structures were found to be thermally stable under air: the MCM-41 is stable until 1273 K while the [Al]-MCM-41 resists up to 1173 K. Silicate-based catalysts are more active than the aluminosilicate-supported Pd samples; while no changes were observed on the structure of the materials during the catalytic test, it was found that the addition of La and Cc decreased their activity. The catalytic activity was correlated with the hydrophobic character of the supports, and with the smaller temperature of PdO reduction presented by the catalysts. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:115 / 122
页数:8
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