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Título: | Process design of a hydrogen production plant from natural gas with CO2 capture based on a novel Ca/Cu chemical loop |
Autor: | Martínez Berges, Isabel; Romano, M. C.; Fernández García, José Ramón CSIC ORCID ; Chiesa, Paolo; Murillo Villuendas, Ramón CSIC ORCID ; Abanades García, Juan Carlos CSIC ORCID | Palabras clave: | Ca/Cu looping process CO2 capture Pressurized H2 production |
Fecha de publicación: | 17-oct-2013 | Editor: | Elsevier | Citación: | Applied Energy 114: 192-208 (2014) | Resumen: | A detailed and comprehensive design of a H2 production plant based on a novel Ca/Cu chemical looping process is presented in this work. This H2 production process is based on the sorption-enhanced reforming concept using natural gas together with a CaO/CaCO3 chemical loop. A second Cu/CuO loop is incorporated to supply energy for the calcination of the CaCO3 via the reduction of CuO with a fuel gas. A comprehensive energy integration description of the different gas streams available in the plant is provided to allow a thermodynamic assessment of the process and to highlight its advantages and drawbacks. Hydrogen equivalent efficiencies of up to 77% are feasible with this novel Ca/Cu looping process, using an active reforming catalyst based on Pt, high oxidation temperatures and moderate gas velocities in the fixed bed system, which are around 6% points above the efficiency of a reference H2 production plant based on conventional steam reforming including CO2 capture with MDEA. Non-converted carbon compounds in the reforming stage are removed as CO2 in the calcination stage of the Ca/Cu looping process, which will be compressed and sent for storage. Carbon capture efficiencies of around 94% can be obtained with this Ca/Cu looping process, which are significantly higher than those obtained in the reference plant that uses MDEA absorption (around 85%). Additional advantages, such as its compact design and the use of cheaper materials compared to other commercial processes for H2 production with CO2 capture, confirm the potential of the Ca/Cu looping process as a pre-combustion CO2 capture technology for H2 production. | Descripción: | 8 figures, 4 tables.-- © 2013. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ | Versión del editor: | http://dx.doi.org/10.1016/j.apenergy.2013.09.026 | URI: | http://hdl.handle.net/10261/342688 | Identificadores: | doi: 10.1016/j.apenergy.2013.09.026 issn: 0306-2619 e-issn: 1872-9118 |
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