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Received March 8, 2018
Accepted April 17, 2018
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PEMFC 고분자막 내구 평가를 위한 Fenton 반응에서 과산화수소 농도 변화에 관한 연구
Variation of Hydrogen Peroxide Concentration during Fenton Reaction for Test the Membrane Durability of PEMFC
순천대학교 화학공학과, 57922 전라남도 순천시 중앙로 255
Department of Chemical Engineering, Sunchon National University, 255, Jungang-ro, Suncheon-si, Jeollanam-do, 57922, Korea
parkkp@sunchon.ac.kr
Korean Chemical Engineering Research, June 2018, 56(3), 315-319(5), 10.9713/kcer.2018.56.3.315 Epub 4 June 2018
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Abstract
고분자전해질연료전지(PEMFC)의 고분자막 전기화학적 내구성을 셀 밖에서 평가하는 방법으로 펜톤(Fenton)반응이 많이 이용된다. 본 연구에서는 펜톤 반응에 영향을 주는 인자를 파악하고자 하였다. 반응진행도를 파악하기 위해 펜톤반응에서는 생성물로서 라디칼을 분석해야 하는데, 라디칼을 분석하기 어려워 반응물인 과산화수소 농도를 분석해 반응진행도를 측정하였다. 온도에 따른 과산화수소 변화속도를 측정해 활성화 에너지를 계산한 결과 180분에서 24.9 kJ/mol 이었다. 펜톤반응 속도는 철이온 농도에 많은 영향을 받았다. 80 °C, 200 rpm, Fe2+ 80 ppm 조건에서는 1시간동안에도 과산화수소 농도가 20%이상 처음과 차이가 나므로 용액교체를 자주 하는 것이 막열화 속도를 증가시킴을 보였다.
Fenton reaction is widely used as a out of cell method for evaluating the membrane electrochemical durability of Proton Exchange Fuel Cell (PEMFC). In this study, we investigated the factors affecting the Fenton reaction. In order to estimate the degree of the reaction, it is necessary to analyze the radicals as a product in the Fenton reaction. However, since the radicals are difficult to analyze, the degree of the reaction was measured by analyzing the concentration of hydrogen peroxide. The activation energy was calculated from the rate of hydrogen peroxide change with temperature. The activation energy was 24.9 kJ/mol at 180 min. The Fenton reaction rate was affected by the iron ion concentration. At 80 °C, 200 rpm, and Fe2+ 80 ppm, the concentration of hydrogen peroxide was decreased more than 20% even for 1 hour, which shows that frequent solution replacement increases the membrane degradation rate.
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Tang HL, Shen PK, Jiang SP, Fang W, Mu P, J. Power Sources, 170(1), 85 (2007)
