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Título: | Experimental investigation of the Ca-Cu process for H2 production: Evaluation of reduction/calcination strategies |
Autor: | Díez-Martín, Laura CSIC ORCID; López Sebastián, José Manuel CSIC ORCID ; Martínez Berges, Isabel; Grasa Adiego, Gemma CSIC ORCID ; Murillo Villuendas, Ramón CSIC ORCID ; Fernández García, José Ramón CSIC ORCID | Palabras clave: | Pressurized H2 production CO2 capture Ca/Cu looping process Fixed bed reactor |
Fecha de publicación: | 4-feb-2019 | Editor: | Elsevier | Citación: | International Journal of Greenhouse Gas Control 83: 43-50 (2019) | Resumen: | The exothermic reduction of the CuO present in a bed of solids (39% wt. CuO, 24.5% wt. CaCO3 and 1.5% wt. Ni, being the rest inert species for the process) with a fuel gas, generated a pure CO2 stream once steam was condensed (and free of N2). In this way, a Cu/Ca molar ratio of approximately 2 in the bed of solids allowed for CaCO3 calcination efficiencies of around 95% molar basis at the reducing gases break-through. This allowed performing consecutive cycles of the main reaction steps involved in the Ca/Cu H2 production process. The mixture CaO-based sorbent, reforming catalyst and Cu-based material was able to produce a gas stream with a 94.0% vol. H2 at 10 bar during the CH4 sorption enhanced reforming stage. The Cu-based material was oxidized with a highly diluted air stream at 10 bar, reacting in a well defined reaction front. A pure CO2 gas stream was obtained at reactor exit during the calcination/reduction stage with a fuel gas typical composition of a Steam Methane Reforming (SMR) stage with low steam to carbon molar ratio (S/C). The experimental results indicated that it was possible to cool the bed and to produce a syngas with a H2/CO molar ratio of about 3.5 suitable for its use in the calcination/reduction stage, in a SMR stage with low (S/C). It was also possible to perform the calcination/reduction and SMR in one single stage. | Descripción: | 5 Figures, 1 Table.-- Work presented at the 14th International Conference on Greenhouse Gas Control Technologies, GHGT-14, del 21 al 25 Octubre 2018, Melbourne, Australia | Versión del editor: | http://dx.doi.org/10.1016/j.ijggc.2019.01.022 | URI: | http://hdl.handle.net/10261/181209 | DOI: | 10.1016/j.ijggc.2019.01.022 | ISSN: | 1750-5836 |
Aparece en las colecciones: | (ICB) Artículos (INCAR) Artículos |
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