Review of thermodynamic properties of the components in HI decomposition section of the iodine–sulfur process
Review of thermodynamic properties of the components in HI decomposition section of the iodine–sulfur process
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DOI：
10.1016/j.ijhydene.2011.05.071
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发表时间：
2011-08
影响因子：
7.2
通讯作者：
Hanfei Guo;Ping Zhang;Songzhe Chen;Laijun Wang;Jingming Xu
中科院分区：
文献类型：
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作者：
Hanfei Guo;Ping Zhang;Songzhe Chen;Laijun Wang;Jingming Xu
碘-硫热化学水裂解制氢工艺（I-S工艺）被认为是最有前途的高效、无CO2、大规模制氢方法之一。HI分解工段的HI浓缩工段（HI X工段）是整个工艺中能耗最大的部分。深入研究和利用加氢反应器各组分的热力学性质，对优化I-S工艺、提高制氢效率具有重要意义。本文对I-S流程中HIx段各组分的热力学性质进行了总结和评述。研究了二元混合物的相平衡性质和热力学函数值，对I2-H2O、HI-H2O、HI-I2及HI-I2-H2O三元体系进行了总结和比较。此外，还对三碘络合平衡进行了论证，并对不同文献提供的几种平衡常数表达式进行了比较。最后，对三元体系的热力学模型进行了总结。
The iodine–sulfur thermochemical water-splitting process (I–S process) is regarded as one of the most promising high efficient, CO2free, and large scale hydrogen production methods. The HI concentration subsection of the HI decomposition section (HIxsection) is the most energy consuming portion of the whole process. To optimize the I–S process and improve hydrogen production efficiency, it is significant to extensively investigate and utilize the thermodynamic properties of the components in HIxsection. This paper summarizes and reviews the thermodynamic properties of the components in HIxsection of the I–S process. The phase equilibrium property and the values of thermodynamic functions of the binary mixtures, i.e., I2-H2O, HI-H2O, HI-I2and the ternary system HI-I2-H2O are summarized and compared. In addition, the tri-iodide complexation equilibrium is demonstrated and several equilibrium constant expressions provided by different literature are compared. Finally, the thermodynamic models for the ternary system are summarized.