Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Effect of Iodine Input in the Liquid-Liquid Separation Properties on Bunsen Reaction Process

분젠반응공정에서 요오드 투입에 따른 2액상 분리 특성

  • Jeong, Heondo (Advanced Process Research Center, Korea Institute of Energy Research) ;
  • Kim, In-Hwan (Advanced Process Research Center, Korea Institute of Energy Research) ;
  • Kim, Tae-Hwan (Advanced Process Research Center, Korea Institute of Energy Research) ;
  • Choo, Ko-Yeon (Advanced Process Research Center, Korea Institute of Energy Research) ;
  • Bae, Gi-Gwang (Hydrogen Energy Research Center, Korea Institute of Energy Research)
  • 정헌도 (한국에너지기술연구원 신공정연구센터) ;
  • 김인환 (한국에너지기술연구원 신공정연구센터) ;
  • 김태환 (한국에너지기술연구원 신공정연구센터) ;
  • 추고연 (한국에너지기술연구원 신공정연구센터) ;
  • 배기광 (한국에너지기술연구원 열화학수소연구센터)
  • Received : 2008.02.15
  • Accepted : 2008.03.19
  • Published : 2008.06.30
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Abstract

The bunsen reaction, part of IS(Iodine-sulfur) cycle that one of the hydrogen production by the thermochemical water splitting, was investigated. It was observed that $H_2SO_4$ was uniformly generated and generation of $H_2SO_4$ was independent of iodine input. However, generation of HI was decreased with increasing iodine input. It was thought that HI and unreacted iodine were formed complex compound such as $HI_3$ $HI_5$ or $HI_7$. The complex compound accelerated liquid-liquid separation properties in the product. It was also revealed that reaction kinetics was increased with increasing iodine input. Liquid-liquid separation properties were improved with increasing iodine input and reaction temperature. Moreover, no side reaction was occurred at all reaction conditions.

열화학적 물분해에 의한 수소 생산 공정 중의 하나인 IS(Iodine-sulfur) 사이클에서 요오드와 이산화황, 그리고 물을 반응물로 하여 요오드화수소와 황산을 제조하는 분젠 반응에 대한 연구를 수행하였다. 요오드의 투입 몰수에 관계없이 황산의 생성량은 일정하였으나 요오드화수소의 생성량은 요오드의 투입 몰수가 증가함에 따라 감소하는 경향을 나타내었다. 이는 생성된 요오드화수소와 미 반응된 요오드가 $HI_3$ $HI_5$ or $HI_7$와 같은 착화합물인 polyiodide를 형성하기 때문인 것으로 생각된다. 이들 착화합물의 형성은 생성물의 2액상 분리 특성의 향상을 가져온다. 또한 요오드 투입 몰수의 증가함에 따라 반응 속도는 향상되었다. 반응물인 요오드의 투입 몰수 및 반응 온도가 증가함에 따라 생성 용액의 2액상 분리 특성이 향상되었으며 모든 실험의 조건 하에서 부반응은 발생 되지 않는 것으로 나타났다.

Keywords

Acknowledgement

Supported by : 과학기술부

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