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HIx system thermodynamic model for hydrogen production by the sulfur-iodine cycle

Hadj-Kali, Mohamed and Gerbaud, Vincent and Borgard, Jean-Marc and Baudouin, Olivier and Floquet, Pascal and Joulia, Xavier and Carles, Philippe HIx system thermodynamic model for hydrogen production by the sulfur-iodine cycle. (2009) International Journal of Hydrogen Energy, 3 (4). 1696-1709. ISSN 0360-3199

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Official URL: http://dx.doi.org/10.1016/j.ijhydene.2008.12.035


The HIx ternary system (H2O – HI – I2) is the latent source of hydrogen for the Sulfur – Iodine thermo-chemical cycle. After analysis of the literature data and models, a homogeneous approach with the Peng-Robinson equation of state used for both the vapor and liquid phase fugacity calculations is proposed for the first time to describe the phase equilibrium of this system. The MHV2 mixing rule is used, with UNIQUAC activity coefficient model combined with of hydrogen iodide solvation by water. This approach is theoretically consistent for HIx separation processes operating above HI critical temperature. Model estimation is done on selected literature vapor – liquid, liquid – liquid, vapor – liquid – liquid and solid – liquid equilibrium data for the ternary system and the three binaries subsystems. Validation is done on the remaining literature data. Results agree well with the published data, but more experimental effort is needed to improve modeling of the HIx system.

Item Type:Article
Additional Information:The original publication is available on http://www.sciencedirect.com/science/journal/03603199
HAL Id:hal-03572160
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > ProSim (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Laboratory name:
CEA, DEN, Physical Chemistry Department, Gif-sur-Yvette, France
Deposited On:12 Feb 2009 12:49

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