Experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with CH4
The reduction reaction of copper oxide with CH4 is highly exothermic and can be arranged to generate sufficient heat to in-situ calcine calcium carbonate and produce a highly concentrated stream of CO2. This concept is tested at TRL4 in a packed-bed reactor operated close to adiabatic conditions. The impact of the initial solids temperature and the inlet flowrate of the gases is evaluated. A 50/50 (vol.%) mixture of methane and hydrogen (i.e., a possible composition of the PSA-off gas generated in a reforming process) has also been used as reducing gas. The presence of H2 reduces the CuO/CaCO3 proportion required in the bed and promotes the calcination at temperatures lower than 870 °C. The experimental measurements are well predicted by a one-dimensional fixed-bed reactor model, in which the steam methane reforming, water–gas-shift, carbon deposition and carbon gasification reactions are also considered. Different characterization techniques (i.e., SEM, XRD, N2 adsorption, TPR) demonstrate that both commercial CuO- and CaO-based materials show good stability after successive cyclic experiments.
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Language: | English |
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Elsevier
2018-09-01
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Subjects: | CO2 capture, Chemical looping, Calcium looping, H2 production, CaCO3 calcination, CuO reduction, |
Online Access: | http://hdl.handle.net/10261/216471 http://dx.doi.org/10.13039/501100000780 |
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dig-incar-es-10261-2164712020-09-02T04:31:06Z Experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with CH4 Fernández García, José Ramón Abanades García, Juan Carlos European Commission Fernández García, José Ramón [0000-0001-9801-7043] Abanades Garcia, Juan Carlos [0000-0003-1711-6993] CO2 capture Chemical looping Calcium looping H2 production CaCO3 calcination CuO reduction The reduction reaction of copper oxide with CH4 is highly exothermic and can be arranged to generate sufficient heat to in-situ calcine calcium carbonate and produce a highly concentrated stream of CO2. This concept is tested at TRL4 in a packed-bed reactor operated close to adiabatic conditions. The impact of the initial solids temperature and the inlet flowrate of the gases is evaluated. A 50/50 (vol.%) mixture of methane and hydrogen (i.e., a possible composition of the PSA-off gas generated in a reforming process) has also been used as reducing gas. The presence of H2 reduces the CuO/CaCO3 proportion required in the bed and promotes the calcination at temperatures lower than 870 °C. The experimental measurements are well predicted by a one-dimensional fixed-bed reactor model, in which the steam methane reforming, water–gas-shift, carbon deposition and carbon gasification reactions are also considered. Different characterization techniques (i.e., SEM, XRD, N2 adsorption, TPR) demonstrate that both commercial CuO- and CaO-based materials show good stability after successive cyclic experiments. The authors acknowledge the contribution of J.M Alarcon during the experimental campaign. This research was funded by the EU-FP7 ASCENT Project (Grant agreement number 608512). Peer reviewed 2020-07-10T12:10:39Z 2020-07-10T12:10:39Z 2018-09-01 artículo http://purl.org/coar/resource_type/c_6501 Chemical Engineering Science 193: 120-132 (2019) 0009-2509 http://hdl.handle.net/10261/216471 10.1016/j.ces.2018.09.001 1873-4405 http://dx.doi.org/10.13039/501100000780 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/608512 Postprint https://doi.org/10.1016/j.ces.2018.09.001 Sí open Elsevier |
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CO2 capture Chemical looping Calcium looping H2 production CaCO3 calcination CuO reduction CO2 capture Chemical looping Calcium looping H2 production CaCO3 calcination CuO reduction |
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CO2 capture Chemical looping Calcium looping H2 production CaCO3 calcination CuO reduction CO2 capture Chemical looping Calcium looping H2 production CaCO3 calcination CuO reduction Fernández García, José Ramón Abanades García, Juan Carlos Experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with CH4 |
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The reduction reaction of copper oxide with CH4 is highly exothermic and can be arranged to generate sufficient heat to in-situ calcine calcium carbonate and produce a highly concentrated stream of CO2. This concept is tested at TRL4 in a packed-bed reactor operated close to adiabatic conditions. The impact of the initial solids temperature and the inlet flowrate of the gases is evaluated. A 50/50 (vol.%) mixture of methane and hydrogen (i.e., a possible composition of the PSA-off gas generated in a reforming process) has also been used as reducing gas. The presence of H2 reduces the CuO/CaCO3 proportion required in the bed and promotes the calcination at temperatures lower than 870 °C. The experimental measurements are well predicted by a one-dimensional fixed-bed reactor model, in which the steam methane reforming, water–gas-shift, carbon deposition and carbon gasification reactions are also considered. Different characterization techniques (i.e., SEM, XRD, N2 adsorption, TPR) demonstrate that both commercial CuO- and CaO-based materials show good stability after successive cyclic experiments. |
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European Commission |
author_facet |
European Commission Fernández García, José Ramón Abanades García, Juan Carlos |
format |
artículo |
topic_facet |
CO2 capture Chemical looping Calcium looping H2 production CaCO3 calcination CuO reduction |
author |
Fernández García, José Ramón Abanades García, Juan Carlos |
author_sort |
Fernández García, José Ramón |
title |
Experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with CH4 |
title_short |
Experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with CH4 |
title_full |
Experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with CH4 |
title_fullStr |
Experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with CH4 |
title_full_unstemmed |
Experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with CH4 |
title_sort |
experimental testing and model validation of the calcination of calcium carbonate by the reduction of copper oxide with ch4 |
publisher |
Elsevier |
publishDate |
2018-09-01 |
url |
http://hdl.handle.net/10261/216471 http://dx.doi.org/10.13039/501100000780 |
work_keys_str_mv |
AT fernandezgarciajoseramon experimentaltestingandmodelvalidationofthecalcinationofcalciumcarbonatebythereductionofcopperoxidewithch4 AT abanadesgarciajuancarlos experimentaltestingandmodelvalidationofthecalcinationofcalciumcarbonatebythereductionofcopperoxidewithch4 |
_version_ |
1777669040068624384 |