Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole
Despite the numerous advantages of continuous processing, high-value chemical production is still dominated by batch techniques. In this paper, we investigate options for the continuous dehydrogenation of 1,2,3,4-tetrahydrocarbazole using a trickle bed reactor operating under realistic liquid veloci...
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my.um.eprints.118382015-01-11T05:02:13Z http://eprints.um.edu.my/11838/ Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole Shen, Y. Ma'amor, A. Abu-Dharieh, J. Thompson, J.M. Kalirai, B. Stitt, E.H. Rooney, D.W. Q Science (General) QD Chemistry Despite the numerous advantages of continuous processing, high-value chemical production is still dominated by batch techniques. In this paper, we investigate options for the continuous dehydrogenation of 1,2,3,4-tetrahydrocarbazole using a trickle bed reactor operating under realistic liquid velocities with and without the addition of a hydrogen acceptor. Here, a commercial 5 wt % Pd/Al2O3 catalyst was observed to slowly deactivate, hence proving unsuitable for continuous use. This deactivation was attributed to the strong adsorption of a byproduct on the surface of the support. Application of a base washing technique resolved this issue and a stable continuous reaction has been demonstrated. As was previously shown for the batch reaction, the addition of a hydrogen acceptor gas (propene) can increase the overall catalytic activity of the system. American Chemical Society 2014-03-11 Article PeerReviewed Shen, Y. and Ma'amor, A. and Abu-Dharieh, J. and Thompson, J.M. and Kalirai, B. and Stitt, E.H. and Rooney, D.W. (2014) Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole. Organic Process Research and Development, 18 (3). pp. 392-341. ISSN 1083-6160 http://pubs.acs.org/doi/abs/10.1021/op400217d http://doi.org/10.1021/op400217d |
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Q Science (General) QD Chemistry Shen, Y. Ma'amor, A. Abu-Dharieh, J. Thompson, J.M. Kalirai, B. Stitt, E.H. Rooney, D.W. Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole |
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Despite the numerous advantages of continuous processing, high-value chemical production is still dominated by batch techniques. In this paper, we investigate options for the continuous dehydrogenation of 1,2,3,4-tetrahydrocarbazole using a trickle bed reactor operating under realistic liquid velocities with and without the addition of a hydrogen acceptor. Here, a commercial 5 wt % Pd/Al2O3 catalyst was observed to slowly deactivate, hence proving unsuitable for continuous use. This deactivation was attributed to the strong adsorption of a byproduct on the surface of the support. Application of a base washing technique resolved this issue and a stable continuous reaction has been demonstrated. As was previously shown for the batch reaction, the addition of a hydrogen acceptor gas (propene) can increase the overall catalytic activity of the system. |
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Article |
author |
Shen, Y. Ma'amor, A. Abu-Dharieh, J. Thompson, J.M. Kalirai, B. Stitt, E.H. Rooney, D.W. |
author_facet |
Shen, Y. Ma'amor, A. Abu-Dharieh, J. Thompson, J.M. Kalirai, B. Stitt, E.H. Rooney, D.W. |
author_sort |
Shen, Y. |
title |
Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole |
title_short |
Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole |
title_full |
Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole |
title_fullStr |
Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole |
title_full_unstemmed |
Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole |
title_sort |
moving from batch to continuous operation for the liquid phase dehydrogenation of tetrahydrocarbazole |
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American Chemical Society |
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2014 |
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http://eprints.um.edu.my/11838/ http://pubs.acs.org/doi/abs/10.1021/op400217d http://doi.org/10.1021/op400217d |
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13.18916 |