Propane oxidative dehydrogenation on silica based oxide catalysts

被引：7

作者：

Parmaliana, A

Sokolovskii, V

Arena, F

Frusteri, F

Miceli, D

机构：

[1] UNIV WITWATERSRAND,DEPT CHEM,JOHANNESBURG 2050,SOUTH AFRICA

[2] IST CNR TAE,I-98126 ST LUCIA,MESSINA,ITALY

来源：

CATALYSIS LETTERS | 1996年 / 40卷 / 1-2期

关键词：

silica catalysts; propylene; propane oxidative dehydrogenation; reduced sites; vanadia/silica catalysts;

D O I：

10.1007/BF00807465

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 to propylene with molecular O-2 (PPD) has been investigated on commercial bare SiO2 and medium loaded V2O5 and MoO3 catalysts at 450-525 degrees C. The direct relationship between the density of reduced sites (rho, 10(16) s(r) g(cat)(-1)), evaluated in steady-state conditions by O-2 chemisorption, and the POD reaction rate proves the occurrence of a ''concerted'' reaction mechanism involving the activation of gas-phase O-2 On the reduced sites of the catalyst surface. A straight-line correlation between the activity of such silica based catalysts in POD and methane partial oxidation to formaldehyde (MPO) at 525 degrees C has been disclosed.

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收藏

页码：105 / 108

页数：4

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