Role of Surface Carboxylates in the Gas Phase Ozone-Assisted Catalytic Oxidation of Toluene

Role of Surface Carboxylates in the Gas Phase Ozone-Assisted Catalytic Oxidation of Toluene was conducted over MnO /γ-Al O to identify and differ - x 2 3 entiate the role of reaction byproducts. It was found that not only alumina acted as a reservoir for toluene, but also it interacted effectively with toluene to create surface car - boxylate intermediates. Surface carboxylates were essential for an effective oxidation process, and they did not directly cause catalyst deactivation. The presence of Mn sites was necessary for further oxidation of the surface carboxylates. At 90 °C, a stable catalytic activity with 95% conversion was achieved. However, at 25 °C, byproducts such as ace- tic acid and formic acid accumulated on the surface of the catalyst and decreased the catalyst activity. Keywords Mechanism · Intermediate · Ozonation · VOC · Deactivation · DRIFTS Electronic supplementary material The online version of this 1 Introduction article (doi:10.1007/s10562-017-2143-0) contains supplementary material, which is available to authorized users. Volatile organic compounds (VOCs) are important indoor * Jafar Soltan and outdoor air pollutants. VOCs can have adverse health j.soltan@usask.ca effects on eyes, skin, lungs and the central nervous system [1]. A number of techniques have been used for removal Department of Chemical and Biological Engineering, of VOCs from air. The most common methods are adsorp- University of Saskatchewan, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Catalysis Letters Springer Journals

Role of Surface Carboxylates in the Gas Phase Ozone-Assisted Catalytic Oxidation of Toluene

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Chemistry; Catalysis; Industrial Chemistry/Chemical Engineering; Organometallic Chemistry; Physical Chemistry
ISSN
1011-372X
eISSN
1572-879X
D.O.I.
10.1007/s10562-017-2143-0
Publisher site
See Article on Publisher Site

Abstract

was conducted over MnO /γ-Al O to identify and differ - x 2 3 entiate the role of reaction byproducts. It was found that not only alumina acted as a reservoir for toluene, but also it interacted effectively with toluene to create surface car - boxylate intermediates. Surface carboxylates were essential for an effective oxidation process, and they did not directly cause catalyst deactivation. The presence of Mn sites was necessary for further oxidation of the surface carboxylates. At 90 °C, a stable catalytic activity with 95% conversion was achieved. However, at 25 °C, byproducts such as ace- tic acid and formic acid accumulated on the surface of the catalyst and decreased the catalyst activity. Keywords Mechanism · Intermediate · Ozonation · VOC · Deactivation · DRIFTS Electronic supplementary material The online version of this 1 Introduction article (doi:10.1007/s10562-017-2143-0) contains supplementary material, which is available to authorized users. Volatile organic compounds (VOCs) are important indoor * Jafar Soltan and outdoor air pollutants. VOCs can have adverse health j.soltan@usask.ca effects on eyes, skin, lungs and the central nervous system [1]. A number of techniques have been used for removal Department of Chemical and Biological Engineering, of VOCs from air. The most common methods are adsorp- University of Saskatchewan,

Journal

Catalysis LettersSpringer Journals

Published: Jul 24, 2017

References

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