Affiliation:
1. Department of Applied Chemistry, Anhui Provincial Engineering Laboratory of Functional Membrane Science and Technology School of Chemistry and Materials Science, University of Science and Technology of China Hefei China
Abstract
AbstractThe chlor‐alkali process is currently the predominant technology for caustic soda production but has several major challenges, such as enormous energy demand and supply–demand imbalance between NaOH and Cl2 in downstream industries. Herein, we propose a novel ion‐injection bipolar membrane electrodialysis (IJBMED) system that is capable of boosting water splitting in a bipolar membrane with an ultrahigh current density while omittance concentration polarization in anion‐ and cation‐exchange membranes. The results indicate that the IJBMED approach enables one‐step conversion of the NaCl‐containing brine stream into 8.12 mol/L NaOH with specific energy consumption of 0.79 kWh/kg NaOH (23 wt.% → 25 wt.%), compared to 2.15 kWh/kg NaOH (28 wt.% → 30 wt.%) for the chlor‐alkali process. The advantages of low energy consumption and omittance of chlorine emissions suggest that IJBMED might be a promising alternative to the chlor‐alkali process, revealing a new route to reshape the chemical industry for caustic soda production.
Funder
Key Technologies Research and Development Program
Key Technologies Research and Development Program of Anhui Province
National Natural Science Foundation of China
Natural Science Foundation of Anhui Province
Subject
General Chemical Engineering,Environmental Engineering,Biotechnology
Cited by
1 articles.
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