Temperature programmed desorption study on the mechanism of SO2 oxidation by activated carbon and activated carbon fibres

被引：119

作者：

Raymundo-Piñero, E ^{[1
]}

Cazorla-Amorós, D ^{[1
]}

Linares-Solano, A ^{[1
]}

机构：

[1] Univ Alicante, Dept Quim Inorgan, E-03080 Alicante, Spain

来源：

CARBON | 2001年 / 39卷 / 02期

关键词：

activated carbon; carbon fibres; infrared spectroscopy; adsorption properties; catalytic properties;

D O I：

10.1016/S0008-6223(00)00119-6

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 mechanism of SO2 oxidation by O-2 on ACFs and ACFs has been studied over a wide variety of samples with different porosity and surface oxygen content. Temperature programmed desorption experiments after SO, adsorption at room temperature and using gas mixtures with different compositions and in-situ FTIR experiments during the adsorption and the subsequent desorption, show that SO2 oxidation is inhibited by the oxygen complexes existing on the carbon surface. The experiments also suggest that the SO2 oxidation occurs through the interaction of adsorbed SOL with OL in the gas phase by a mechanism that follows an Eley-Rideal kinetic model. Desorption of SO, produces carbon gasification and generates selectively CO-type oxygen complexes at the surface: CO2 gas is only formed through secondary reactions between SO, and CO. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：231 / 242

页数：12

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