황-요오드 수소 생산 공정의 분젠 반응 부분에서 부반응 제어 (The Control of Side Reactions in Bunsen Reaction Section of Sulfur-Iodine Hydrogen Production Process)

서지정보

· 발행기관 : 한국수소및신에너지학회
· 수록지 정보 : 한국수소및신에너지학회논문집 / 19권 / 6호 / 490 ~ 497페이지
· 저자명 : 이광진, 홍동우, 김영호, 박주식, 배기광

초록

For continuous operation of the sulfur-iodine(SI) thermochemical cycle, which is expected practical method for massive hydrogen production, suggesting operation conditions at steady state is very important. Especially, in the Bunsen reaction section, the Bunsen reaction as well as side reactions is occurring simultaneously. Therefore, we studied on the relation between the variation of compositions in product solution and side reactions. The experiments for Bunsen reaction were carried out in the temperature range, from 268 to 353 K, and in the I2/H2O molar ratio of 0.094∼0.297 under a continuous flow of SO2 gas. As the result, sulfur formed predominantly with increasing temperature and decreasing I2/H2O molar ratios. The molar ratios of H2O/H2SO4 and HI/H2SO4 in global system were decreased as the more side reaction occurred. A side reactions did not appear at I2/H2O molar ratios, saturated with I2, irrespective of the temperature change. We concluded that it caused by the increasing stability of an I2xH+ complex and a steric hindrance with increasing I2/HI molar ratios.

영어초록

For continuous operation of the sulfur-iodine(SI) thermochemical cycle, which is expected practical method for massive hydrogen production, suggesting operation conditions at steady state is very important. Especially, in the Bunsen reaction section, the Bunsen reaction as well as side reactions is occurring simultaneously. Therefore, we studied on the relation between the variation of compositions in product solution and side reactions. The experiments for Bunsen reaction were carried out in the temperature range, from 268 to 353 K, and in the I2/H2O molar ratio of 0.094∼0.297 under a continuous flow of SO2 gas. As the result, sulfur formed predominantly with increasing temperature and decreasing I2/H2O molar ratios. The molar ratios of H2O/H2SO4 and HI/H2SO4 in global system were decreased as the more side reaction occurred. A side reactions did not appear at I2/H2O molar ratios, saturated with I2, irrespective of the temperature change. We concluded that it caused by the increasing stability of an I2xH+ complex and a steric hindrance with increasing I2/HI molar ratios.

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