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...
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| Format: | Thesis |
| Language: | English |
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2011
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| Online Access: | http://eprints.usm.my/43398/1/MOHAMMAD%20ANWAR%20MOHAMED%20IQBAL.pdf |
| _version_ | 1825834786431696896 |
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| author | Mohamed Iqbal, Mohammad Anwar |
| author_facet | Mohamed Iqbal, Mohammad Anwar |
| author_sort | Mohamed Iqbal, Mohammad Anwar |
| collection | USM |
| 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. |
| first_indexed | 2024-03-06T15:27:55Z |
| format | Thesis |
| id | usm.eprints-43398 |
| institution | Universiti Sains Malaysia |
| language | English |
| last_indexed | 2024-03-06T15:27:55Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | usm.eprints-433982019-04-12T05:26:44Z http://eprints.usm.my/43398/ Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation 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 NonPeerReviewed application/pdf en http://eprints.usm.my/43398/1/MOHAMMAD%20ANWAR%20MOHAMED%20IQBAL.pdf Mohamed Iqbal, Mohammad Anwar (2011) Heterogeneous Catalysts From Rice Husk Modified With Chromium, Molybdenum And Tungsten: Synthesis, Characterization And Application In Styrene Oxidation. PhD thesis, Universiti Sains Malaysia. |
| 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 |
| title | 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_short | 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 |
| topic | QD1-999 Chemistry |
| url | http://eprints.usm.my/43398/1/MOHAMMAD%20ANWAR%20MOHAMED%20IQBAL.pdf |
| work_keys_str_mv | AT mohamediqbalmohammadanwar heterogeneouscatalystsfromricehuskmodifiedwithchromiummolybdenumandtungstensynthesischaracterizationandapplicationinstyreneoxidation |