Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene
Novozym 435 (Candida antarctica lipase B immobilized on polyacrylic resin) is used to generate perlauric acid directly from lauric acid and hydrogen peroxide. This generated perlauric acid was then applied for both in situ and ex situ epoxidation of styrene to styrene oxide. The reactions were carri...
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ftindianacasci:oai:repository.ias.ac.in:111699 2023-05-15T13:39:33+02:00 Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene Yadav, Ganapati D. Borkar, Indrakant V. 2006-03 http://repository.ias.ac.in/111699/ http://onlinelibrary.wiley.com/doi/10.1002/aic.10700/abstract unknown John Wiley & Sons, Inc. Yadav, Ganapati D. Borkar, Indrakant V. (2006) Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene AIChE Journal, 52 (3). pp. 1235-1247. ISSN 0001-1541 T Technology (General) Article PeerReviewed 2006 ftindianacasci 2017-09-15T22:09:53Z Novozym 435 (Candida antarctica lipase B immobilized on polyacrylic resin) is used to generate perlauric acid directly from lauric acid and hydrogen peroxide. This generated perlauric acid was then applied for both in situ and ex situ epoxidation of styrene to styrene oxide. The reactions were carried out by using conventional heating as well as microwave heating. Various kinetic parameters affecting the conversion and initial rates of styrene to styrene oxide were studied including mass transfer, mechanism, kinetic modeling, and deactivation. Under microwave irradiation, there was an increase in the frequency factor resulting from enhanced collision of molecules, which can in turn be attributed to the increasing entropy of the system. The values of activation energy for the conventional and microwave heating are almost the same. The enzyme is deactivated by hydrogen peroxide and perlauric acid and also at high temperature under conventional heating. In the presence of microwaves, the deactivation of Novozym 435 was substantially reduced. Article in Journal/Newspaper Antarc* Antarctica Indian Academy of Sciences: Publication of Fellows |
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Indian Academy of Sciences: Publication of Fellows |
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ftindianacasci |
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unknown |
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T Technology (General) |
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T Technology (General) Yadav, Ganapati D. Borkar, Indrakant V. Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene |
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T Technology (General) |
description |
Novozym 435 (Candida antarctica lipase B immobilized on polyacrylic resin) is used to generate perlauric acid directly from lauric acid and hydrogen peroxide. This generated perlauric acid was then applied for both in situ and ex situ epoxidation of styrene to styrene oxide. The reactions were carried out by using conventional heating as well as microwave heating. Various kinetic parameters affecting the conversion and initial rates of styrene to styrene oxide were studied including mass transfer, mechanism, kinetic modeling, and deactivation. Under microwave irradiation, there was an increase in the frequency factor resulting from enhanced collision of molecules, which can in turn be attributed to the increasing entropy of the system. The values of activation energy for the conventional and microwave heating are almost the same. The enzyme is deactivated by hydrogen peroxide and perlauric acid and also at high temperature under conventional heating. In the presence of microwaves, the deactivation of Novozym 435 was substantially reduced. |
format |
Article in Journal/Newspaper |
author |
Yadav, Ganapati D. Borkar, Indrakant V. |
author_facet |
Yadav, Ganapati D. Borkar, Indrakant V. |
author_sort |
Yadav, Ganapati D. |
title |
Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene |
title_short |
Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene |
title_full |
Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene |
title_fullStr |
Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene |
title_full_unstemmed |
Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene |
title_sort |
kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene |
publisher |
John Wiley & Sons, Inc. |
publishDate |
2006 |
url |
http://repository.ias.ac.in/111699/ http://onlinelibrary.wiley.com/doi/10.1002/aic.10700/abstract |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Yadav, Ganapati D. Borkar, Indrakant V. (2006) Kinetic modeling of microwave-assisted chemoenzymatic epoxidation of styrene AIChE Journal, 52 (3). pp. 1235-1247. ISSN 0001-1541 |
_version_ |
1766120188273491968 |