Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen

The direct conversion of methane to higher hydrocarbons either over metal catalyst or zeolite has not been successful so far in achieving the methane conversion with higher hydrocarbons selectivity within the economic range due to oxidation of the product. The present research aims at improving the...

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Main Authors: Mat, Ramli, Mohamed, Mahadhir, Johari, Anwar, Ali, Asmadi
Format: Article
Published: Inderscience Enterprises Ltd 2011
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Online Access:http://eprints.utm.my/id/eprint/39874/
http://dx.doi.org/10.1504/IJOGCT.2011.043717
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spelling my.utm.398742018-11-30T06:41:52Z http://eprints.utm.my/id/eprint/39874/ Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen Mat, Ramli Mohamed, Mahadhir Johari, Anwar Ali, Asmadi TJ Mechanical engineering and machinery The direct conversion of methane to higher hydrocarbons either over metal catalyst or zeolite has not been successful so far in achieving the methane conversion with higher hydrocarbons selectivity within the economic range due to oxidation of the product. The present research aims at improving the performance of BZSM-5 catalyst with the addition of copper. Catalytic behaviours at different reaction conditions were investigated. Reaction temperature, oxygen concentration, copper loading and space velocity have been identified as the contributing factors in methane conversion and higher hydrocarbon selectivity. Methane conversion is favourable at higher temperatures which shows 78% conversion at 900 °C. The selectivity of C 5 + hydrocarbons increases from 650 °C up to 800 °C, but decreases slightly soon after. In methane conversion, the initial step involves an activation of methane to form CH 3 * free radicals via concerted actions between copper species and acid sites. CH 3 * radicals react in the gas phase to form C 2 + . The formation of CO x was derived from the secondary reaction of the CH 3 * radicals with metal oxide catalyst or complete combustion of C 2 + products. The formation of CO x was reduced at low oxygen concentration and short residence time. Inderscience Enterprises Ltd 2011 Article PeerReviewed Mat, Ramli and Mohamed, Mahadhir and Johari, Anwar and Ali, Asmadi (2011) Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen. International Journal of Oil, Gas and Coal Technology, 4 (4). ISSN 1753-3309 http://dx.doi.org/10.1504/IJOGCT.2011.043717 DOI:10.1504/IJOGCT.2011.043717
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Mat, Ramli
Mohamed, Mahadhir
Johari, Anwar
Ali, Asmadi
Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen
description The direct conversion of methane to higher hydrocarbons either over metal catalyst or zeolite has not been successful so far in achieving the methane conversion with higher hydrocarbons selectivity within the economic range due to oxidation of the product. The present research aims at improving the performance of BZSM-5 catalyst with the addition of copper. Catalytic behaviours at different reaction conditions were investigated. Reaction temperature, oxygen concentration, copper loading and space velocity have been identified as the contributing factors in methane conversion and higher hydrocarbon selectivity. Methane conversion is favourable at higher temperatures which shows 78% conversion at 900 °C. The selectivity of C 5 + hydrocarbons increases from 650 °C up to 800 °C, but decreases slightly soon after. In methane conversion, the initial step involves an activation of methane to form CH 3 * free radicals via concerted actions between copper species and acid sites. CH 3 * radicals react in the gas phase to form C 2 + . The formation of CO x was derived from the secondary reaction of the CH 3 * radicals with metal oxide catalyst or complete combustion of C 2 + products. The formation of CO x was reduced at low oxygen concentration and short residence time.
format Article
author Mat, Ramli
Mohamed, Mahadhir
Johari, Anwar
Ali, Asmadi
author_facet Mat, Ramli
Mohamed, Mahadhir
Johari, Anwar
Ali, Asmadi
author_sort Mat, Ramli
title Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen
title_short Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen
title_full Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen
title_fullStr Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen
title_full_unstemmed Methane conversion to higher hydrocarbons over copper loaded BZSM-5 in the presence of oxygen
title_sort methane conversion to higher hydrocarbons over copper loaded bzsm-5 in the presence of oxygen
publisher Inderscience Enterprises Ltd
publishDate 2011
url http://eprints.utm.my/id/eprint/39874/
http://dx.doi.org/10.1504/IJOGCT.2011.043717
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score 13.222552