Modelling the partial oxidation of methane to formaldehyde on silica catalyst

被引：21

作者：

Arena, F

Frusteri, F

Parmaliana, A

机构：

[1] Univ Messina, Dipartimento Chim Ind & Ingn Mat, I-98166 Messina, Italy

[2] CNR, Ist TAE, I-98126 Messina, Italy

[3] Univ Rome La Sapienza, Dipartimento Chim, I-00185 Rome, Italy

来源：

APPLIED CATALYSIS A-GENERAL | 2000年 / 197卷 / 02期

关键词：

methane partial oxidation; formaldehyde; silica catalyst; kinetic modelling; surface reduced sites; oxygen chemisorption;

D O I：

10.1016/S0926-860X(99)00481-0

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 kinetics of the partial oxidation of methane to formaldehyde (MPO) on the silica catalyst at 650 degrees C has been investigated using a flow recirculation batch reactor. The influence of methane and oxygen concentration on density of reduced sites of the catalyst under steady-state conditions has been evaluated by in situ oxygen uptake measurements (RTOC). The reaction order with respect to CH4 and O-2 is 0.9 and 0.2, respectively, while the density of reduced sites depends upon the square-root of the PCH4/PO2 ratio. A formal Langmuir-Hinshelwood (L-H) model, accounting for the dissociative activation of both CH4 and O-2 molecules, is adopted to describe the reaction kinetics of the MPO on silica catalyst. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：239 / 246

页数：8

共 26 条

[1] Methane partial oxidation by unsupported and silica supported iron phosphate catalysts - Influence of reaction conditions and co-feeding of water on activity and selectivity [J].