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Microstructured Mesh Contactor for Asymmetric Transfer Hydrogenation with Simultaneous Stripping: Modeling and Experiments

Zanfir, M; Sun, X; Gavriilidis, A; (2008) Microstructured Mesh Contactor for Asymmetric Transfer Hydrogenation with Simultaneous Stripping: Modeling and Experiments. IND ENG CHEM RES , 47 (23) 8995 - 9005. 10.1021/ie071653s.

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Abstract

A two-dimensional model for a mesh contactor utilized for acetone stripping from binary mixtures acetone-isopropanol with nitrogen as inert gas, as well as for asymmetric transfer hydrogenation of acetophenone with isopropanol as the hydrogen donor in the presence of a homogeneous catalyst and simultaneous acetone removal by stripping has been formulated and solved. Experiments have been performed with a microstructured mesh contactor that consists of parallel metal plates, gaskets, and a microstructured mesh so that passages for gas and liquid phases are formed. The model gives good agreement with experimental data for both acetone removal from a binary mixture and asymmetric transfer of hydrogenation. Theoretical and experimental investigations show that the amount of acetone removed from the liquid phase is strongly dependent on the ratio of inlet gas to liquid flowrate. For a higher ratio, more efficient acetone removal from the liquid phase is achieved. If dry nitrogen is used as a stripping agent, simultaneous evaporation of acetone and isopropanol results in significant solvent depletion of the liquid phase. In this case, the gas phase becomes saturated with solvent (isopropanol) near the reactor entrance. Due to efficient removal of acetone produced as byproduct during the reaction, reaction time in the mesh reactor can be significantly decreased as compared to a laboratory batch reactor.

Type: Article
Title: Microstructured Mesh Contactor for Asymmetric Transfer Hydrogenation with Simultaneous Stripping: Modeling and Experiments
DOI: 10.1021/ie071653s
Keywords: OF-THE-ART, MEMBRANE DISTILLATION, GAS-LIQUID, MASS-TRANSFER, PERVAPORATION, SEPARATION, DESIGN, MICROREACTOR, PERFORMANCE, MIXTURES
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/112547
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