Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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A Review of Chlorine Evolution Mechanism on Dimensionally Stable Anode (DSA®)

DSA 전극에서 염소 발생 메커니즘

  • Kim, Jiye (School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University) ;
  • Kim, Choonsoo (School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University) ;
  • Kim, Seonghwan (School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University) ;
  • Yoon, Jeyong (School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University)
  • 김지예 (서울대학교 공과대학 화학생물공학부, 화학공정신기술 연구소) ;
  • 김춘수 (서울대학교 공과대학 화학생물공학부, 화학공정신기술 연구소) ;
  • 김성환 (서울대학교 공과대학 화학생물공학부, 화학공정신기술 연구소) ;
  • 윤제용 (서울대학교 공과대학 화학생물공학부, 화학공정신기술 연구소)
  • Received : 2015.01.02
  • Accepted : 2015.01.30
  • Published : 2015.10.01
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Abstract

Chlor-alkali industry is one of the largest electrochemical processes which annually producing 70 million tons of sodium hydroxide and chlorine from sodium chloride solution. $DSA^{(R)}$ (Dimensionally Stable Anodes) electrodes such as $RuO_2$ and $IrO_2$, which is popular in chlor-alkali process, have been investigated to improve the chlorine generation efficiency. Although DSA electrode has been developed with various researches, understanding of the chlorine evolution mechanism is essential to the development of highly efficient DSA electrode. In this review paper, chlorine generation mechanisms are summarized and that of key factors are identified to systematically understand the chlorine generation mechanism. Rate determining step, effect of pH, reaction intermediate, and electrode crystal structure were intensively overviewed as key factors of the chlorine mechanism.

클로로알카리 산업은 염화나트륨 수용액의 전기분해로 연간 약 7천만 톤의 가성소다 및 염소를 생산하는 전 세계적으로 가장 큰 전기화학 공정 중 하나이다. 클로로알카리 공정에서는 DSA(Dimensionally Stable Anodes) 전극인 $RuO_2$ 및 $IrO_2$를 주로 사용하여 염소를 생산하며 상업적으로 사용되고 있는 전극에 비하여 염소 발생 효율이 높은 전극을 개발하려는 연구가 계속되고 있다. 그러나 보다 염소 발생 효율이 좋은 전극을 개발하기 위해서는 DSA 전극에서의 염소 발생 메커니즘에 대한 이해가 뒷받침되어야 한다. 따라서 본 글에서는 기존 연구를 중심으로 DSA 전극에서 염소 발생 메커니즘 연구가 현재까지 어떻게 발전되어 왔는지 검토하고 염소 발생 메커니즘의 핵심적인 요인들을 분석 및 정리하여 DSA 전극에서 염소 발생을 체계적으로 이해하는데 도움이 되고자 한다.

Keywords

References

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