Enhancement of Brønsted acidity in silica-titania aerogel was achieved by loading both sulfate and vanadium onto the material. This phenomena could be due to formation of V(OSi)2OH-O-SO3- in the resulted sample. In contrast, no noticeable Brønsted acidity was detected in vanadium loaded silica-titania aerogel (V/ST). UV-vis DR analysis results showed that the amount of hydrated tetrahedral titanium species, which acts as oxidative site, increased significantly upon sulfation and vanadium loading on the surface of the aerogel. However, presence of vanadium in the samples tended to transform framework tetrahedral titanium to extra framework octahedral titanium structure. The catalytic performance of the samples were evaluated in consecutive transformation of 1-octene to 1,2-octanediol through formation of 1,2-epoxyoctane using aqueous H2O2.
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- Toluene Combustion over Metal Oxide Washcoated Monolithic Catalyst
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- HZSM-5 and H-Ferrierite Acidity Modification by Silylation and Their Activities in n-Butene Isomerisation
- Production of Syngas by Combination of CO Reforming and Partial Oxidation of CH over Ni/AlO Catalysts in Fixed-bed Reactor
- Modelling Catalyst Deactivation by External Coke Deposition during Fluid Catalytic Cracking
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- Removal of Zinc Ions from Water Using Emulsion Liquid Membrane
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Enhancement of Brønsted Acidity in Sulfate-Vanadium Treated Silica-Titania Aerogel as Oxidative-Acidic Bifunctional Catalyst
1Universiti Teknologi Malaysia, sllee@ibnusina.utm.my
2Universiti Teknologi Malaysia, rain_5234@hotmail.com
3Universiti Teknologi Malaysia, hadi@ibnusina.utm.my
4Universiti Teknologi Malaysia, hali@kimia.fs.utm.my
Citation Information: International Journal of Chemical Reactor Engineering. Volume 8, Issue 1, Pages –, ISSN (Online) 1542-6580, DOI: 10.2202/1542-6580.2289, March 2010
Publication History:
- Published Online:
- 2010-03-29
Keywords: silica-titania aerogel; Brønsted acid; sulfate; vanadium; impregnation; bifunctional catalyst
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