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Received February 15, 2008
Accepted March 19, 2008
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분젠반응공정에서 요오드 투입에 따른 2액상 분리 특성
Effect of Iodine Input in the Liquid-Liquid Separation Properties on Bunsen Reaction Process
한국에너지기술연구원 신공정연구센터, 305-343, 대전시 유성구 장동 71-2 1한국에너지기술연구원 열화학수소연구센터, 305-343, 대전시 유성구 장동 71-2
Advanced Process Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejon 305-343, Korea 1Hydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejon 305-343, Korea
hdjung@kier.re.kr
Korean Chemical Engineering Research, June 2008, 46(3), 633-638(6), NONE Epub 7 July 2008
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Abstract
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 HI3 HI5 or HI7와 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.
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 H2SO4 was uniformly generated and generation of H2SO4 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 HI3 HI5 or HI7. 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.
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