Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide

In this work, a gas containing CO2 and SO2 at the usual concentrations on the coal combustion flue gas reacted with calcium hydroxide to evaluate and quantify the influence of SO2 on the CO2 capture and vice versa. This influence was quantified with a continuous gas analyzer and by thermogravimetry...

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Autores: Fernández Ferreras, Josefa|||0000-0003-0250-3130, Renedo Omaechevarría, Josefina
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/9755
Acceso en línea:http://hdl.handle.net/10902/9755
Access Level:acceso abierto
Palabra clave:CO2 and SO2 capture
Low temperature
Flue gas
Calcium hydroxide
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spelling Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxideFernández Ferreras, Josefa|||0000-0003-0250-3130Renedo Omaechevarría, JosefinaCO2 and SO2 captureLow temperatureFlue gasCalcium hydroxideIn this work, a gas containing CO2 and SO2 at the usual concentrations on the coal combustion flue gas reacted with calcium hydroxide to evaluate and quantify the influence of SO2 on the CO2 capture and vice versa. This influence was quantified with a continuous gas analyzer and by thermogravimetry (TG). Results show that the CO2 retained increases in general as its concentration does and decreases as the SO2 concentration increases. A similar behavior was found for the SO2 retention at different CO2 concentrations being more relevant the influence of the presence of SO2 on the CO2 capture than the opposite one. Results suggest that for a high CO2 capture, SO2 should be eliminated previously. With respect to the reaction process it was found that the desulfurization product clearly identified was CaSO3·½H2O; in the reaction between Ca(OH)2 and CO2, CaCO3 is mainly obtained, the complex CaO·CO2 being another possible product synthesized in low amount. Gas analyzer shows that SO2 and CO2 react simultaneously and that a part of the CaCO3 reacts with the SO2 and releases CO2. Sulfation values calculated by TG and from the gas analyzer are very similar but the amount of CO2 captured is not possible to know clearly by TG due to the synthesis and decomposition of CaCO3 during the process. The study of the evolution of the sorbent porosity in the process reveals that the presence of both acid gases produces a lower blockage of the pores than when only one gas is present probably due to the generation of new pores in the reaction of CaCO3 and SO2.We are thankful to MICINN in Spain, National Plan for Scientific Research, Development and Innovation, for financial support under Project: MAT2010-18862 and to the University of Cantabria, Project Ref. 51.VP10.64005.Walter de GruyterUniversidad de Cantabria20152015-01-06journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/9755International Journal of Chemical Reactor Engineering, 2015, 13 (2), 177–182reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/97552026-06-02T12:39:31Z
dc.title.none.fl_str_mv Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide
title Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide
spellingShingle Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide
Fernández Ferreras, Josefa|||0000-0003-0250-3130
CO2 and SO2 capture
Low temperature
Flue gas
Calcium hydroxide
title_short Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide
title_full Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide
title_fullStr Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide
title_full_unstemmed Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide
title_sort Sulfation and carbonation competition in the treatment of flue gas from a coal-based power plant by calcium hydroxide
dc.creator.none.fl_str_mv Fernández Ferreras, Josefa|||0000-0003-0250-3130
Renedo Omaechevarría, Josefina
author Fernández Ferreras, Josefa|||0000-0003-0250-3130
author_facet Fernández Ferreras, Josefa|||0000-0003-0250-3130
Renedo Omaechevarría, Josefina
author_role author
author2 Renedo Omaechevarría, Josefina
author2_role author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv CO2 and SO2 capture
Low temperature
Flue gas
Calcium hydroxide
topic CO2 and SO2 capture
Low temperature
Flue gas
Calcium hydroxide
description In this work, a gas containing CO2 and SO2 at the usual concentrations on the coal combustion flue gas reacted with calcium hydroxide to evaluate and quantify the influence of SO2 on the CO2 capture and vice versa. This influence was quantified with a continuous gas analyzer and by thermogravimetry (TG). Results show that the CO2 retained increases in general as its concentration does and decreases as the SO2 concentration increases. A similar behavior was found for the SO2 retention at different CO2 concentrations being more relevant the influence of the presence of SO2 on the CO2 capture than the opposite one. Results suggest that for a high CO2 capture, SO2 should be eliminated previously. With respect to the reaction process it was found that the desulfurization product clearly identified was CaSO3·½H2O; in the reaction between Ca(OH)2 and CO2, CaCO3 is mainly obtained, the complex CaO·CO2 being another possible product synthesized in low amount. Gas analyzer shows that SO2 and CO2 react simultaneously and that a part of the CaCO3 reacts with the SO2 and releases CO2. Sulfation values calculated by TG and from the gas analyzer are very similar but the amount of CO2 captured is not possible to know clearly by TG due to the synthesis and decomposition of CaCO3 during the process. The study of the evolution of the sorbent porosity in the process reveals that the presence of both acid gases produces a lower blockage of the pores than when only one gas is present probably due to the generation of new pores in the reaction of CaCO3 and SO2.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-01-06
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/9755
url http://hdl.handle.net/10902/9755
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Walter de Gruyter
publisher.none.fl_str_mv Walter de Gruyter
dc.source.none.fl_str_mv International Journal of Chemical Reactor Engineering, 2015, 13 (2), 177–182
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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