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Silica and boron nitride supported molybdenum and vanadium oxide catalysts for alkane oxidation

Pollard, Ashleigh J. J. 2004. Silica and boron nitride supported molybdenum and vanadium oxide catalysts for alkane oxidation. PhD Thesis, Cardiff University.

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Abstract

A range of silica supported molybdenum catalysts and vanadium catalysts have been prepared and tested for alkane oxidation. Further vanadium catalysts supported on boron nitride have also been prepared and tested for alkane oxidation. The silica supported molybdenum oxide catalysts demonstrated appreciable activity for propane total oxidation to carbon oxides with some trace acrolein. The silica supported vanadium catalysts were also active for propane oxidation, and although the major product was carbon dioxide, higher selectivity to acrolein was observed when compared to the silica supported molybdenum catalysts. The use of boron nitride as a support significantly increased the selectivity towards acrolein and other selective oxidation products like acrylic acid. These results lead to the catalysts being tested for propene oxidation, which produced similar results that showed the boron nitride supported vanadium catalysts were more selective than the silica supported catalysts for acrolein. Further tests were carried out on methane and ethane, which produced mostly carbon oxides as a result. The effect of co-feeding water was also tested when performing propane oxidation with the presence of water effecting the selectivity and activity of the catalysts. Some catalyst's activity was suppressed with increased selectivity to acrolein and other catalysts activity was promoted which led to total oxidation to carbon oxides. This study aim is to compare and contrast the different catalysts produced and give evidence about how the use and development of a hydrophobic support may lead to better catalyst design in the future.

Item Type: Thesis (PhD)
Status: Unpublished
Schools: Chemistry
Subjects: Q Science > QD Chemistry
ISBN: 9781303158537
Date of First Compliant Deposit: 30 March 2016
Last Modified: 12 Feb 2016 23:14
URI: http://orca-mwe.cf.ac.uk/id/eprint/55535

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