Electrochemical Reduction of Tetrachloromethane. Electrolytic Conversion to Chloroform

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Title:Electrochemical Reduction of Tetrachloromethane. Electrolytic Conversion to Chloroform
Creators:
Molina, Victor M.
González-Arjona, Domingo
Roldán, Emilio
Dominguez, Manuel
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 67, 3, pp. 279-292
Uncontrolled Keywords:Carbon tetrachloride, Voltammetry, Electrochemistry, Reductions, Chlorinated compounds, Electroreductions

Abstract

The feasibility of electrolytic removal of tetrachloromethane from industrial effluents has been investigated. A new method based on the electrochemical reductive dechlorination of CCl<sub>4</sub> yielding chloroform is described. The main goal was not only to remove CCl<sub>4</sub> but also to utilize the process for obtaining chloroform, which can be industrially reused. GC-MS analysis of the electrolysed samples showed that chloroform is the only product. Voltammetric experiments were made in order to select experimental conditions of the electrolysis. Using energetic and economic criteria, ethanol-water (1 : 4) and LiCl were found to be the optimum solvent and supporting electrolyte tested. No great differences were found while working at different pH values. Chronoamperometric and voltammetric experiments with convolution analysis showed low <i>k</i><sub>f</sub><sup>0</sup> and α values for the reaction. A new differential pulse voltammetric peak deconvolution method was developed for an easier and faster analysis of the electrolysis products. Electrolysis experiments were carried out using both a bulk reactor and a through-flow cell. Thus, three different kinds of galvanostatic electrolyses were carried out. Under all conditions, CCl<sub>4</sub> conversions ranging from 60 to 75% and good current efficiencies were obtained. <p>

Title:Electrochemical Reduction of Tetrachloromethane. Electrolytic Conversion to Chloroform
Creators:
Molina, Victor M.
González-Arjona, Domingo
Roldán, Emilio
Dominguez, Manuel
Uncontrolled Keywords:Carbon tetrachloride, Voltammetry, Electrochemistry, Reductions, Chlorinated compounds, Electroreductions
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:67
Number:3
Page Range:pp. 279-292
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20020279UNSPECIFIED
ID Code:1921
Item Type:Article
Deposited On:06 Feb 2009 17:14
Last Modified:06 Feb 2009 16:14

Citation

Molina, Victor M.; González-Arjona, Domingo; Roldán, Emilio; Dominguez, Manuel (2002) Electrochemical Reduction of Tetrachloromethane. Electrolytic Conversion to Chloroform. Collection of Czechoslovak Chemical Communications, 67 (3). pp. 279-292. ISSN 0010-0765

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