Improved catalytic oxidation of cumene by formation of catalytically active species during reaction over NaX zeolite

被引：12

作者：

Beauchet, R. ^{[1
]}

Mijoin, J. ^{[1
]}

Magnoux, P. ^{[1
]}

机构：

[1] Univ Poitiers, CNRS, UMR 6503, Catalyse Chim Organ Lab, F-86022 Poitiers, France

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2009年 / 88卷 / 1-2期

关键词：

VOCs; Catalytic oxidation; Active coke; Pore mouth catalysis; VOLATILE ORGANIC-COMPOUNDS; METHYL-ISOBUTYL-KETONE; CHLORINATED HYDROCARBONS; COMBUSTION; VOC; MIXTURES; DICHLOROMETHANE; PT/GAMMA-AL2O3; TRANSFORMATION; CHLOROBENZENE;

D O I：

10.1016/j.apcatb.2008.09.014

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：

Catalytic oxidation of isopropylbenzene (cumene, 210 ppm) in wet air was essentially investigated over basic NaX zeolite. Experiments were carried out in presence of water (11,000 ppm) and at a gas hourly space velocity (GHSV) of 18,000 h(-1). Over NaX, the cumene showed a catalyst activation phenomenon during the reaction time. Indeed, after 175 min of reaction at 250 degrees C the conversion of cumene increases from 45% to 100% and the CO2 yield from 30% to 95% probably because of the formation of active species mainly localized at the cavities apertures of the basic zeolite. Peroxide or peroxy radicals were proposed to be these particular active species. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：106 / 112

页数：7

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