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Bunsen section thermodynamic model for hydrogen production by the sulfur-Iodine cycle

Hadj-Kali, Mohamed and Gerbaud, Vincent and Lovera, Patrick and Baudouin, Olivier and Floquet, Pascal and Joulia, Xavier and Borgard, Jean-Marc and Carles, Philippe Bunsen section thermodynamic model for hydrogen production by the sulfur-Iodine cycle. (2009) International Journal of Hydrogen Energy, 3 (16). 6625-6635. ISSN 0360-3199

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Official URL: http://dx.doi.org/10.1016/j.ijhydene.2009.06.022


A model for the Bunsen section of the Sulfur – Iodine thermo-chemical cycle is proposed, where sulfur dioxide reacts with excess water and iodine to produce two demixing liquid aqueous phases (H2SO4 rich and HI rich) in equilibrium. Considering the mild temperature and pressure conditions, the UNIQUAC activity coefficient model combined with Engels’ solvation model is used. The complete model is discussed, with HI solvation by water and by iodine as well as H2SO4 solvation by water, leading to a very high complexity with almost hundred parameters to be estimated from experimental data. Taking into account the water excess, a successful reduced model with only 15 parameters is proposed after defining new apparent species. Acids total dissociation and total H+ solvation by water are the main assumptions. Results show a good agreement with published experimental data between 25 °C and 120 °C.

Item Type:Article
HAL Id:hal-03573174
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:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Procédés Systèmes Industriels (PSI) - Analyse fonctionnelle des Procédés
Deposited On:18 Sep 2009 07:19

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