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Open AccessArticle

Experimental Study for HIx Concentration by Electro-Electrodialysis (EED) Cells in the Water Splitting Sulfur-Iodine Thermochemical Cycle

ENEA Casaccia Research Center, via Anguillarese 301, 00123 Rome, Italy
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ChemEngineering 2019, 3(2), 50; https://doi.org/10.3390/chemengineering3020050
Received: 6 February 2019 / Revised: 5 May 2019 / Accepted: 8 May 2019 / Published: 12 May 2019
The efficiency of HI concentration/separation from a HIx solution, (mixture of HI/H2O/I2) represents a crucial factor in the sulfur-iodine thermochemical water splitting process for hydrogen production. In this paper, an experimental study on HI cathodic concentration in HIx solution using stacked electro-electrodialysis (EED) cells was carried out under the conditions of 1 atm and at three different temperature (25, 55 and 85 °C) and using a current density of 0.10 A/cm2. Results showed that an increase in HI concentration can be obtained under certain conditions. The apparent transport number (t+) in all the experiments was very close to 1, and the electro-osmosis coefficient (β) changed in a range of 1.08–1.16. The tests showed a detectable, though slow, increase in both the anodic iodine and cathodic hydriodic acid concentrations. View Full-Text
Keywords: bunsen reaction; sulfur-iodine cycle; thermochemical water splitting; electrodialysis bunsen reaction; sulfur-iodine cycle; thermochemical water splitting; electrodialysis
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MDPI and ACS Style

Caputo, G.; Balog, I.; Giaconia, A.; Sau, S.; Pozio, A. Experimental Study for HIx Concentration by Electro-Electrodialysis (EED) Cells in the Water Splitting Sulfur-Iodine Thermochemical Cycle. ChemEngineering 2019, 3, 50. https://doi.org/10.3390/chemengineering3020050

AMA Style

Caputo G, Balog I, Giaconia A, Sau S, Pozio A. Experimental Study for HIx Concentration by Electro-Electrodialysis (EED) Cells in the Water Splitting Sulfur-Iodine Thermochemical Cycle. ChemEngineering. 2019; 3(2):50. https://doi.org/10.3390/chemengineering3020050

Chicago/Turabian Style

Caputo, Giampaolo; Balog, Irena; Giaconia, Alberto; Sau, Salvatore; Pozio, Alfonso. 2019. "Experimental Study for HIx Concentration by Electro-Electrodialysis (EED) Cells in the Water Splitting Sulfur-Iodine Thermochemical Cycle" ChemEngineering 3, no. 2: 50. https://doi.org/10.3390/chemengineering3020050

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