The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems
[EN] Postcombustion CO2 capture by calcium looping (CaL) is being rapidly developed for coal combustion applications. This work discusses the impact of the accumulation of CaSO4 and other inert solids on CO2 capture efficiency and the overall CaL process performance. Several process configurations are considered, and the mass and energy balances and an updated carbonator reactor model are solved for each configuration. The minimum fresh sorbent requirements for sustaining a certain level of CO2 capture efficiency are quantified as well as the effects of an increase in the make-up flow. It was found that the main effect on the CaL process is produced by the sulfur present in the coal fed to the calciner and in the flue gas entering the carbonator. For a typical set of operating conditions it was calculated that the deactivating effect caused by an increase of 0.5% in the sulfur content with respect to a reference coal (low ash content) fed to the calciner is similar to the effect caused by the accumulation of inerts when using a coal with 15% more ash.
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Format: | artículo biblioteca |
Language: | English |
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Elsevier
2013-07
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Subjects: | CO2 capture, Calcium looping, Coal combustion, Sulfation, Carbonation, |
Online Access: | http://hdl.handle.net/10261/84207 |
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dig-incar-es-10261-842072018-11-15T10:28:55Z The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems Diego de Paz, María Elena Arias Rozada, Borja Alonso Carreño, Mónica Abanades García, Juan Carlos CO2 capture Calcium looping Coal combustion Sulfation Carbonation [EN] Postcombustion CO2 capture by calcium looping (CaL) is being rapidly developed for coal combustion applications. This work discusses the impact of the accumulation of CaSO4 and other inert solids on CO2 capture efficiency and the overall CaL process performance. Several process configurations are considered, and the mass and energy balances and an updated carbonator reactor model are solved for each configuration. The minimum fresh sorbent requirements for sustaining a certain level of CO2 capture efficiency are quantified as well as the effects of an increase in the make-up flow. It was found that the main effect on the CaL process is produced by the sulfur present in the coal fed to the calciner and in the flue gas entering the carbonator. For a typical set of operating conditions it was calculated that the deactivating effect caused by an increase of 0.5% in the sulfur content with respect to a reference coal (low ash content) fed to the calciner is similar to the effect caused by the accumulation of inerts when using a coal with 15% more ash. M.E. Diego acknowledges a fellowship Grant under the CSIC JAE Programme, co-funded by the European Social Fund. The financial support given by the RECaL project (RFCR-2012-RECaL) is also acknowledged. Peer reviewed 2013-10-16T07:18:07Z 2013-10-16T07:18:07Z 2013-07 artículo http://purl.org/coar/resource_type/c_6501 Fuel 109: 184–190 (2013) 0016-2361 http://hdl.handle.net/10261/84207 10.1016/j.fuel.2012.11.062 en http://dx.doi.org/10.1016/j.fuel.2012.11.062 open Elsevier |
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CO2 capture Calcium looping Coal combustion Sulfation Carbonation CO2 capture Calcium looping Coal combustion Sulfation Carbonation |
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CO2 capture Calcium looping Coal combustion Sulfation Carbonation CO2 capture Calcium looping Coal combustion Sulfation Carbonation Diego de Paz, María Elena Arias Rozada, Borja Alonso Carreño, Mónica Abanades García, Juan Carlos The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems |
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[EN] Postcombustion CO2 capture by calcium looping (CaL) is being rapidly developed for coal combustion applications. This work discusses the impact of the accumulation of CaSO4 and other inert solids on CO2 capture efficiency and the overall CaL process performance. Several process configurations are considered, and the mass and energy balances and an updated carbonator reactor model are solved for each configuration. The minimum fresh sorbent requirements for sustaining a certain level of CO2 capture efficiency are quantified as well as the effects of an increase in the make-up flow. It was found that the main effect on the CaL process is produced by the sulfur present in the coal fed to the calciner and in the flue gas entering the carbonator. For a typical set of operating conditions it was calculated that the deactivating effect caused by an increase of 0.5% in the sulfur content with respect to a reference coal (low ash content) fed to the calciner is similar to the effect caused by the accumulation of inerts when using a coal with 15% more ash. |
format |
artículo |
topic_facet |
CO2 capture Calcium looping Coal combustion Sulfation Carbonation |
author |
Diego de Paz, María Elena Arias Rozada, Borja Alonso Carreño, Mónica Abanades García, Juan Carlos |
author_facet |
Diego de Paz, María Elena Arias Rozada, Borja Alonso Carreño, Mónica Abanades García, Juan Carlos |
author_sort |
Diego de Paz, María Elena |
title |
The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems |
title_short |
The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems |
title_full |
The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems |
title_fullStr |
The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems |
title_full_unstemmed |
The impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems |
title_sort |
impact of calcium sulfate and inert solids accumulation in post-combustion calcium looping systems |
publisher |
Elsevier |
publishDate |
2013-07 |
url |
http://hdl.handle.net/10261/84207 |
work_keys_str_mv |
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