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Design and operation of a solid polymer electrolyte reactor for electrochemical hydrodehalogenation

Lookup NU author(s): Dr Hua Cheng, Emeritus Professor Keith Scott, Professor Paul ChristensenORCiD

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Abstract

A solid polymer electrolyte reactor is designed for the electrochemical hydrodehalogenation (HDH) of halogenated organic compounds in oil and/or aqueous solutions. The reactor has been evaluated at 0.05, 0.1, 0.2, 1 and 2 dm3 scales under various conditions and its effectiveness has been demonstrated experimentally using the HDH of 2,4-dichlorophenol (DCP) and 2,4-dibromophenol (DBP) as model reactions of environmental interest. The HDH of low concentration DCP and DBP in oil solutions in the reactor achieved conversions up to 35% within 3-4 h with current efficiencies up to 26%, space-time yields up to 0.70 (kg DCP or DBP) m-3 h-1 and energy consumptions of 4.7 kW h (kg DBP or DCP)-1. With the concentrated DCP or DBP-oil solutions, the performances were significantly improved, i.e. current efficiencies of 60-85%, space-time yields of 1.5-5.6 (kg DCP or DBP) m-3 h-1 and energy consumptions of 1.5-2.4 kW h (kg DCP or DBP)-1.The HDH of DCP and DBP in the aqueous solutions was compared to the paraffin oil media and the reactor stability was evaluated for operating times of up to 170 h. © 2004 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Cheng H, Scott K, Christensen PA

Publication type: Article

Publication status: Published

Journal: Chemical Engineering Journal

Year: 2004

Volume: 102

Issue: 2

Pages: 161-170

ISSN (print): 1385-8947

ISSN (electronic): 1873-3212

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.cej.2004.01.029

DOI: 10.1016/j.cej.2004.01.029

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