Development of copper zeolite catalysts for selective alkane oxidation
Selective partial oxidation of methane to methanol was investigated over Cu-ZSM-5 with two main objectives: to improve catalytic activity through modification of the catalyst surface; and to work towards a low-temperature, gas phase catalytic process through building an understanding of the catalyti...
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ndltd-bl.uk-oai-ethos.bl.uk-6767342016-02-03T03:26:36ZDevelopment of copper zeolite catalysts for selective alkane oxidationSheppard, T. L.2014Selective partial oxidation of methane to methanol was investigated over Cu-ZSM-5 with two main objectives: to improve catalytic activity through modification of the catalyst surface; and to work towards a low-temperature, gas phase catalytic process through building an understanding of the catalytic cycle. Na-ZSM-5 was modified by the commercial silylating agent BSTFA, synthesising a range of functionalised catalysts from 0.2-20% silylation by weight. Successful silylation was confirmed by DRIFTS. Following aqueous copper exchange td form functionalised Cu-ZSM-5, analysis by BET and transmission IR revealed selective exchange of catalytically active copper in the zeolite channels at 1-2% silylation, with reduced exchange of inactive copper on the external surface. The latter was also observed during TEM. A large increase in catalytic activity was determined by TPO-MS analysis. Silylation was therefore used to increase the proportion of catalytically active copper present, with potential application in the synthesis of more active catalysts.660Queen's University Belfasthttp://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676734Electronic Thesis or Dissertation |
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660 Sheppard, T. L. Development of copper zeolite catalysts for selective alkane oxidation |
description |
Selective partial oxidation of methane to methanol was investigated over Cu-ZSM-5 with two main objectives: to improve catalytic activity through modification of the catalyst surface; and to work towards a low-temperature, gas phase catalytic process through building an understanding of the catalytic cycle. Na-ZSM-5 was modified by the commercial silylating agent BSTFA, synthesising a range of functionalised catalysts from 0.2-20% silylation by weight. Successful silylation was confirmed by DRIFTS. Following aqueous copper exchange td form functionalised Cu-ZSM-5, analysis by BET and transmission IR revealed selective exchange of catalytically active copper in the zeolite channels at 1-2% silylation, with reduced exchange of inactive copper on the external surface. The latter was also observed during TEM. A large increase in catalytic activity was determined by TPO-MS analysis. Silylation was therefore used to increase the proportion of catalytically active copper present, with potential application in the synthesis of more active catalysts. |
author |
Sheppard, T. L. |
author_facet |
Sheppard, T. L. |
author_sort |
Sheppard, T. L. |
title |
Development of copper zeolite catalysts for selective alkane oxidation |
title_short |
Development of copper zeolite catalysts for selective alkane oxidation |
title_full |
Development of copper zeolite catalysts for selective alkane oxidation |
title_fullStr |
Development of copper zeolite catalysts for selective alkane oxidation |
title_full_unstemmed |
Development of copper zeolite catalysts for selective alkane oxidation |
title_sort |
development of copper zeolite catalysts for selective alkane oxidation |
publisher |
Queen's University Belfast |
publishDate |
2014 |
url |
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676734 |
work_keys_str_mv |
AT sheppardtl developmentofcopperzeolitecatalystsforselectivealkaneoxidation |
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1718176957749788672 |