Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation

A series of chromium, molybdenum and tungsten incorporated silica extracted from rice husk were prepared at pH 10, pH 7 and pH 3 media using solvent extraction method and sol-gel technique. Liquid phase oxidation of styrene using hydrogen peroxide as oxidant was used as a probe to test their catalyt...

Full description

Saved in:

Bibliographic Details
Main Author:	Mohamed Iqbal, Mohammad Anwar
Format:	Thesis
Language:	English
Published:	2011
Subjects:	QD1-999 Chemistry
Online Access:	http://eprints.usm.my/43398/1/MOHAMMAD%20ANWAR%20MOHAMED%20IQBAL.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.43398
record_format	uketd_dc
spelling	my-usm-ep.433982019-04-12T05:26:44Z Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation 2011 Mohamed Iqbal, Mohammad Anwar QD1-999 Chemistry A series of chromium, molybdenum and tungsten incorporated silica extracted from rice husk were prepared at pH 10, pH 7 and pH 3 media using solvent extraction method and sol-gel technique. Liquid phase oxidation of styrene using hydrogen peroxide as oxidant was used as a probe to test their catalytic potential. The incorporation of chromium into the silica matrix resulted in amorphous catalysts labeled RHCr-10, RHCr-7 and RHCr-3. RHCr-3 has the highest surface area (564 m2 g-1) but lowest chromium loading (2.3 w/w %). RHCr-3 showed better structural and catalytic properties compared to RHCr-7 and RHCr-10. About 99.9 % of styrene was successfully oxidized with 63.1 % selectivity towards benzaldehyde. 2011 Thesis http://eprints.usm.my/43398/ http://eprints.usm.my/43398/1/MOHAMMAD%20ANWAR%20MOHAMED%20IQBAL.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Sains Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD1-999 Chemistry
spellingShingle	QD1-999 Chemistry Mohamed Iqbal, Mohammad Anwar Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation
description	A series of chromium, molybdenum and tungsten incorporated silica extracted from rice husk were prepared at pH 10, pH 7 and pH 3 media using solvent extraction method and sol-gel technique. Liquid phase oxidation of styrene using hydrogen peroxide as oxidant was used as a probe to test their catalytic potential. The incorporation of chromium into the silica matrix resulted in amorphous catalysts labeled RHCr-10, RHCr-7 and RHCr-3. RHCr-3 has the highest surface area (564 m2 g-1) but lowest chromium loading (2.3 w/w %). RHCr-3 showed better structural and catalytic properties compared to RHCr-7 and RHCr-10. About 99.9 % of styrene was successfully oxidized with 63.1 % selectivity towards benzaldehyde.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohamed Iqbal, Mohammad Anwar
author_facet	Mohamed Iqbal, Mohammad Anwar
author_sort	Mohamed Iqbal, Mohammad Anwar
title	Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation
title_short	Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation
title_full	Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation
title_fullStr	Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation
title_full_unstemmed	Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation
title_sort	heterogeneous catalysts from rice husk modified with chromium, molybdenum and tungsten: synthesis, characterization and application in styrene oxidation
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kimia
publishDate	2011
url	http://eprints.usm.my/43398/1/MOHAMMAD%20ANWAR%20MOHAMED%20IQBAL.pdf
_version_	1747821206362390528

Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation

Similar Items