Evaluation of an iron-chlorine thermochemical cycle for hydrogen production

dc.creatorCanavesio, Cristian Alberto
dc.creatorNassini, Horacio E.
dc.creatorBohe, Ana Ester
dc.date2015-07-30
dc.identifierhttp://hdl.handle.net/11336/46247
dc.identifierCanavesio, Cristian Alberto; Nassini, Horacio E.; Bohe, Ana Ester; Evaluation of an iron-chlorine thermochemical cycle for hydrogen production; Pergamon-Elsevier Science Ltd; International Journal of Hydrogen Energy; 40; 28; 30-7-2015; 8620-8632
dc.identifier0360-3199
dc.identifierCONICET Digital
dc.identifierCONICET
dc.descriptionIn this paper, a theoretical and experimental study on an iron-chlorine thermochemical cycle for hydrogen production is presented. The study was addressed to confirm the occurrence of the thermochemical reactions originally proposed and to investigate the influence of kinetic parameters for improving the overall performance of this cycle. Firstly, a thermodynamic analysis was done for determining whether this cycle is attractive for hydrogen production at reaction temperatures below 1223 K, in terms of both energy efficiency and yield of hydrogen. Following, proof-of-concept experiments using a batch reactor were performed at different reaction temperatures, pressures and holding times. Experimental results showed that the reaction temperature is expected to have a small effect for increasing the hydrogen production, while an increase of the system pressure was observed to raise markedly the conversion degree achieved. Based on experimental results, it was possible to confirm the reaction pathway of thermochemical reactions originally proposed, to identify the rate determining step of the overall process, and to explain the beneficial effect of increasing the system pressure on the hydrogen yield. Finally, a modified cycle is proposed for increasing its overall energy efficiency, by lowering the reaction temperature of two thermochemical reactions from 1198 K to 923 K in order to avoid the phase change of FeCl2 that melts at 950 K. Comparative calculations of enthalpy balance and external heat and work requirements for the original and modified cycles showed that the limiting energy efficiency could be theoretically increased from the range 24–28% to 32–37% and this significant increment appears to be promising for further investigations.
dc.descriptionFil: Canavesio, Cristian Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia Complejo Tecnológico Pilcaniyeu; Argentina
dc.descriptionFil: Nassini, Horacio E.. Comisión Nacional de Energía Atómica. Gerencia Complejo Tecnológico Pilcaniyeu; Argentina
dc.descriptionFil: Bohe, Ana Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia Complejo Tecnológico Pilcaniyeu; Argentina
dc.formatapplication/pdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherPergamon-Elsevier Science Ltd
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0360319915011209
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2015.04.158
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subjectHydrogen
dc.subjectThermochemical Reactions
dc.subjectIron-Chlorine Cycle
dc.subjectEnergy Efficiency
dc.subjectKinetics
dc.subjecthttps://purl.org/becyt/ford/1.4
dc.subjecthttps://purl.org/becyt/ford/1
dc.titleEvaluation of an iron-chlorine thermochemical cycle for hydrogen production
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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