The liquid phase oxidation of styrene with tungsten modified silica as a catalyst

Tungsten was incorporated into silica matrix using sodium silicate from rice husk at pH 10, 7 and 3. These catalysts were labeled as RHW-10, RHW-7 and RHW-3. The pH was found to have a strong influence on the structure of the resulting silica–tungsten species and its catalytic activity. Analysis sug...

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Main Authors:	Adam, Farook, Mohamed Iqbal, Mohammad Anwar
Format:	Article
Language:	English
Published:	Elsevier BV 2011
Subjects:	QD Chemistry
Online Access:	http://irep.iium.edu.my/22280/ http://irep.iium.edu.my/22280/ http://irep.iium.edu.my/22280/ http://irep.iium.edu.my/22280/1/Chemical_Engineering_Journal_171_%282011%29_1379%E2%80%931386.pdf

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spelling	iium-222802013-06-20T06:45:06Z http://irep.iium.edu.my/22280/ The liquid phase oxidation of styrene with tungsten modified silica as a catalyst Adam, Farook Mohamed Iqbal, Mohammad Anwar QD Chemistry Tungsten was incorporated into silica matrix using sodium silicate from rice husk at pH 10, 7 and 3. These catalysts were labeled as RHW-10, RHW-7 and RHW-3. The pH was found to have a strong influence on the structure of the resulting silica–tungsten species and its catalytic activity. Analysis suggests that the catalysts were composed of isolated [WO4]2− species, isolated tungsten species or low oligomeric tungsten oxide species and crystalline WO3 species. The catalytic activity was tested in the liquid phase oxidation of styrene using H2O2 as oxidant. RHW-3 showed better catalytic activity than RHW-10 and RHW-7 due to its higher tungsten loading. The reaction is proposed to be catalyzed by pertungstic acid like intermediate which was formed upon the interaction of tungsten oxo species (WO) with H2O2. Benzaldehyde was obtained via styrene oxide as the major product with 100% selectivity. RHW-3 could be re-used several times without losing its catalytic activity even though a small amount of tungsten species leached out from the support. Elsevier BV 2011-05 Article PeerReviewed application/pdf en http://irep.iium.edu.my/22280/1/Chemical_Engineering_Journal_171_%282011%29_1379%E2%80%931386.pdf Adam, Farook and Mohamed Iqbal, Mohammad Anwar (2011) The liquid phase oxidation of styrene with tungsten modified silica as a catalyst. Chemical Engineering Journal, 171 (3). pp. 1379-1386. ISSN 1385-8947 http://www.sciencedirect.com/science/article/pii/S1385894711006127 10.1016/j.cej.2011.05.052
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Adam, Farook Mohamed Iqbal, Mohammad Anwar The liquid phase oxidation of styrene with tungsten modified silica as a catalyst
description	Tungsten was incorporated into silica matrix using sodium silicate from rice husk at pH 10, 7 and 3. These catalysts were labeled as RHW-10, RHW-7 and RHW-3. The pH was found to have a strong influence on the structure of the resulting silica–tungsten species and its catalytic activity. Analysis suggests that the catalysts were composed of isolated [WO4]2− species, isolated tungsten species or low oligomeric tungsten oxide species and crystalline WO3 species. The catalytic activity was tested in the liquid phase oxidation of styrene using H2O2 as oxidant. RHW-3 showed better catalytic activity than RHW-10 and RHW-7 due to its higher tungsten loading. The reaction is proposed to be catalyzed by pertungstic acid like intermediate which was formed upon the interaction of tungsten oxo species (WO) with H2O2. Benzaldehyde was obtained via styrene oxide as the major product with 100% selectivity. RHW-3 could be re-used several times without losing its catalytic activity even though a small amount of tungsten species leached out from the support.
format	Article
author	Adam, Farook Mohamed Iqbal, Mohammad Anwar
author_facet	Adam, Farook Mohamed Iqbal, Mohammad Anwar
author_sort	Adam, Farook
title	The liquid phase oxidation of styrene with tungsten modified silica as a catalyst
title_short	The liquid phase oxidation of styrene with tungsten modified silica as a catalyst
title_full	The liquid phase oxidation of styrene with tungsten modified silica as a catalyst
title_fullStr	The liquid phase oxidation of styrene with tungsten modified silica as a catalyst
title_full_unstemmed	The liquid phase oxidation of styrene with tungsten modified silica as a catalyst
title_sort	liquid phase oxidation of styrene with tungsten modified silica as a catalyst
publisher	Elsevier BV
publishDate	2011
url	http://irep.iium.edu.my/22280/ http://irep.iium.edu.my/22280/ http://irep.iium.edu.my/22280/ http://irep.iium.edu.my/22280/1/Chemical_Engineering_Journal_171_%282011%29_1379%E2%80%931386.pdf
first_indexed	2023-09-18T20:34:01Z
last_indexed	2023-09-18T20:34:01Z
_version_	1777408924651094016

The liquid phase oxidation of styrene with tungsten modified silica as a catalyst

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