Does Platinum Generate Gas Phase Methyl Radicals in the Catalytic Combustion of Methane?

被引：6

作者：

Berlowitz, P. ^{[1
,2
]}

Driscoll, D. J. ^{[3
]}

Lunsford, J. H. ^{[3
]}

Butt, J. B. ^{[1
,2
]}

Kung, H. H. ^{[1
,2
]}

机构：

[1] Northwestern Univ, Dept Chem Engn, Evanston, IL 60201 USA

[2] Northwestern Univ, Ipatieff Lab, Evanston, IL 60201 USA

[3] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA

来源：

COMBUSTION SCIENCE AND TECHNOLOGY | 1984年 / 40卷 / 5-6期

关键词：

D O I：

10.1080/00102208408923815

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Using a matrix isolation technique an attempt was made to detect gas phase methyl radicals which had been formed at 500 degrees C on a polycrystalline Pt catalyst dispersed with SiO(2), and at 900 degrees C on a Pt single-crystal catalyst. Reaction products were condensed onto a sapphire rod which was then lowered into an EPR microwave cavity for analysis. No increase in the amount of radicals over the background was detected. Thus, the role of the Pt catalyst in the catalytic combustion of methane is to provide a catalytic surface for the reaction of CH(4) and O(2), and not to facilitate the gas phase reaction by generating free radicals.

引用

页码：317 / 321

页数：5

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