Impact of load changes on the carbonator reactor of a 1.7 MWth calcium looping pilot plant
This work analyses the performance of a Calcium Looping (CaL) carbonator reactor that captures CO from a power plant operating under large load changes. Several experimental campaigns have been conducted in La Pereda 1.7 MW CaL pilot plant where the carbonator inlet flue gas velocity varied between 2.0 and 5.3 m/s, leading to large changes in the particles entrainment rate and the solids inventory. These tests showed that CaL systems using circulating fluidized bed reactors are highly flexible. Modest gas velocities translate into high CO capture efficiencies because circulation rates equivalent to CaO/CO molar ratios ~10–12 can still be maintained, while carbonator solids inventories are relatively large. Under high carbonator gas velocities, a sorbent with high CO carrying capacity is necessary to guarantee high CO capture efficiencies. In these conditions, the recirculation of a fraction of the exiting particles towards the bottom of the carbonator proved to be useful for moderating the solids circulation rate between reactors, increasing the particles residence time in the carbonator and sustaining high CO capture efficiencies. For load increases, staging the flue gas entering the carbonator helped to sustain high CO capture efficiencies thanks to maintaining the solids inventory at the bottom of the reactor.
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Elsevier BV
2020
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Subjects: | CO2 capture, Calcium looping, Carbonator, Flexibility, Part-load, |
Online Access: | http://hdl.handle.net/10261/226528 |
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dig-incar-es-10261-2265282022-04-20T11:22:35Z Impact of load changes on the carbonator reactor of a 1.7 MWth calcium looping pilot plant Diego de Paz, María Elena Arias Rozada, Borja Research Fund for Coal and Steel CO2 capture Calcium looping Carbonator Flexibility Part-load This work analyses the performance of a Calcium Looping (CaL) carbonator reactor that captures CO from a power plant operating under large load changes. Several experimental campaigns have been conducted in La Pereda 1.7 MW CaL pilot plant where the carbonator inlet flue gas velocity varied between 2.0 and 5.3 m/s, leading to large changes in the particles entrainment rate and the solids inventory. These tests showed that CaL systems using circulating fluidized bed reactors are highly flexible. Modest gas velocities translate into high CO capture efficiencies because circulation rates equivalent to CaO/CO molar ratios ~10–12 can still be maintained, while carbonator solids inventories are relatively large. Under high carbonator gas velocities, a sorbent with high CO carrying capacity is necessary to guarantee high CO capture efficiencies. In these conditions, the recirculation of a fraction of the exiting particles towards the bottom of the carbonator proved to be useful for moderating the solids circulation rate between reactors, increasing the particles residence time in the carbonator and sustaining high CO capture efficiencies. For load increases, staging the flue gas entering the carbonator helped to sustain high CO capture efficiencies thanks to maintaining the solids inventory at the bottom of the reactor. This project has received funding from the Research Fund for Coal and Steel under grant agreement N° 709629 (FlexiCaL). 2021-01-13T08:50:09Z 2021-01-13T08:50:09Z 2020 2021-01-13T08:50:10Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.fuproc.2019.106307 issn: 0378-3820 Fuel Processing Technology 200: 106307 (2020) http://hdl.handle.net/10261/226528 10.1016/j.fuproc.2019.106307 #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/RFCS/709629 Postprint http://dx.doi.org/10.1016/j.fuproc.2019.106307 Sí open Elsevier BV |
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CO2 capture Calcium looping Carbonator Flexibility Part-load CO2 capture Calcium looping Carbonator Flexibility Part-load |
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CO2 capture Calcium looping Carbonator Flexibility Part-load CO2 capture Calcium looping Carbonator Flexibility Part-load Diego de Paz, María Elena Arias Rozada, Borja Impact of load changes on the carbonator reactor of a 1.7 MWth calcium looping pilot plant |
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This work analyses the performance of a Calcium Looping (CaL) carbonator reactor that captures CO from a power plant operating under large load changes. Several experimental campaigns have been conducted in La Pereda 1.7 MW CaL pilot plant where the carbonator inlet flue gas velocity varied between 2.0 and 5.3 m/s, leading to large changes in the particles entrainment rate and the solids inventory. These tests showed that CaL systems using circulating fluidized bed reactors are highly flexible. Modest gas velocities translate into high CO capture efficiencies because circulation rates equivalent to CaO/CO molar ratios ~10–12 can still be maintained, while carbonator solids inventories are relatively large. Under high carbonator gas velocities, a sorbent with high CO carrying capacity is necessary to guarantee high CO capture efficiencies. In these conditions, the recirculation of a fraction of the exiting particles towards the bottom of the carbonator proved to be useful for moderating the solids circulation rate between reactors, increasing the particles residence time in the carbonator and sustaining high CO capture efficiencies. For load increases, staging the flue gas entering the carbonator helped to sustain high CO capture efficiencies thanks to maintaining the solids inventory at the bottom of the reactor. |
author2 |
Research Fund for Coal and Steel |
author_facet |
Research Fund for Coal and Steel Diego de Paz, María Elena Arias Rozada, Borja |
format |
artículo |
topic_facet |
CO2 capture Calcium looping Carbonator Flexibility Part-load |
author |
Diego de Paz, María Elena Arias Rozada, Borja |
author_sort |
Diego de Paz, María Elena |
title |
Impact of load changes on the carbonator reactor of a 1.7 MWth calcium looping pilot plant |
title_short |
Impact of load changes on the carbonator reactor of a 1.7 MWth calcium looping pilot plant |
title_full |
Impact of load changes on the carbonator reactor of a 1.7 MWth calcium looping pilot plant |
title_fullStr |
Impact of load changes on the carbonator reactor of a 1.7 MWth calcium looping pilot plant |
title_full_unstemmed |
Impact of load changes on the carbonator reactor of a 1.7 MWth calcium looping pilot plant |
title_sort |
impact of load changes on the carbonator reactor of a 1.7 mwth calcium looping pilot plant |
publisher |
Elsevier BV |
publishDate |
2020 |
url |
http://hdl.handle.net/10261/226528 |
work_keys_str_mv |
AT diegodepazmariaelena impactofloadchangesonthecarbonatorreactorofa17mwthcalciumloopingpilotplant AT ariasrozadaborja impactofloadchangesonthecarbonatorreactorofa17mwthcalciumloopingpilotplant |
_version_ |
1777669056809140224 |