Electrochemical Desalination System Accompanying Wastewater Treatment and CO2 Reduction Reaction

Abstract

The configuration of the hybrid electrochemical desalination system with ion exchange membranes is presented. Ion exchange memebranes (anion exchange membrane, cation exchange membrane) was alternately inserted into the system chambers and induce electrochemical desalination with transport of anions and cations toward the anode (nano-TiO2) and cathode (Bi-foam), respectively. Simultaneously, reactive chlorine species (RCS) was produced with the anodic reaction of chloride ion supplied by its transport from the desalination chamber. the produced reactive chlorine species initiated decomposition reaction of urea in anolyte. the Bi-foam cathode converted the dissolved carbon dioxide into formate, the simplest carboxylate anion with one carbon atom. the Faradaic efficiency of formate production was >95%. Additionally, small solar panel (0.5 x 3.5 cm², 4 V) was wired to examine the solar-to-formate energy efficiency of the hybrid electrochemical desalination system. More details of experiment results will be presented and discussed.

Keywords

Identifiers

DOI

10.1149/ma2020-02643287mtgabs

Journal

ECS Meeting Abstracts

Year

2020