Optimization of liquid-liquid phase separation characteristics in the Bunsen section of the sulfur-iodine hydrogen production process

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• 作者：Qiaoqiao Zhu ; Yanwei Zhang ; ^{zhangyw@zju.edu.cn} ; Chao Zhou ; Zhihua Wang ; Junhu Zhou ; Kefa Cen
• 关键词：Sulfur&ndash ; iodine thermochemical cycle ; Liquid&ndash ; liquid phase separation ; Bunsen section ; Hyper-azeotropic HI concentration
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：April, 2012
• 卷：37
• 期：8
• 页码：6407-6414
• 文件大小：743 K

摘要

In order to optimize the sulfur-iodine thermochemical cycle, a series of experiments were conducted to investigate the separation characteristics of the liquid-liquid phase in the H₂SO₄/HI/I₂/H₂O quaternary solution produced by Bunsen reaction. The effects of the solution composition in the feed and the operating temperature on the separation characteristics were analyzed to determine the preferable operating conditions in the Bunsen section. The increases in both the iodine content and the operating temperature improved the separation characteristics of the liquid-liquid phase when the occurrence of secondary reactions was neglected. The amount of impurities in both phases obviously decreased as the iodine content increased. The effect of the iodine content was more significant relative to that of the operating temperature. The optimal operating conditions were proposed to achieve the concentrations of HI in the HIx phase in excess of the azeotropic composition.