Sulphate-promotion and structure-sensitivity in hydrocarbon combustion over Rh/Al2O3 catalysts
Sulphate-promotion and structure-sensitivity in hydrocarbon combustion over Rh/Al2O3 catalysts
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Rh/Al2O3 催化剂上碳氢化合物燃烧中的硫酸盐促进和结构敏感性
DOI：
10.1016/j.catcom.2006.01.025
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发表时间：
2006
影响因子：
3.7
通讯作者：
K. Wilson
中科院分区：
文献类型：
--
作者：
A. Lee;C. Seabourne;K. Wilson
使用未经处理或预硫酸化的氧化铝载体制备了一系列 Rh/Al2O3 催化剂。载体硫酸化对丙烯和丙烷燃烧催化剂活性的影响已作为 Rh 负载量的函数进行了探索。两种烃的完全氧化的起燃温度随着 Rh 含量的增加而降低，这与从小氧化簇到大金属 Rh 颗粒的转变有关。硫酸盐同样促进丙烯和丙烷的燃烧，其促进程度仅表现出较弱的负载依赖性。催化性能的增强伴随着 Rh 的还原和烧结。
A series of Rh/Al2O3catalysts have been prepared using untreated or pre-sulphated alumina supports. The effect of support sulphation on catalyst activity towards propene and propane combustion has been explored as a function of Rh loading. Light-off temperatures for the total oxidation of both hydrocarbons decrease with increasing Rh content, associated with a transition from small oxidic clusters to large metallic Rh particles. Sulphate promotes both propene and propane combustion equally, with the magnitude of promotion exhibiting only a weak loading dependence. Enhanced catalytic performance is accompanied by Rh reduction and sintering.