Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation

This paper presents the results of the carbonation reaction of two sample types: larnite (Ca2SiO4) powders and larnite/silica aerogel composites, the larnite acting as an active phase in a process of direct mineral carbonation. First, larnite powders were synthesized by the reaction of colloidal sil...

Full description

Bibliographic Details
Authors: Santos, Alberto, Ajbary, Mohamed, Morales Flórez, Víctor, Kherbeche, Abdelhak, Piñero, Manuel, Esquivias Fedriani, Luis María
Format: article
Status:Versión enviada para evaluación y publicación
Publication Date:2009
Country:España
Institution:Universidad de Sevilla (US)
Repository:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/95169
Online Access:https://hdl.handle.net/11441/95169
https://doi.org/10.1016/j.jhazmat.2009.03.026
Access Level:Open access
Keyword:Carbonation
CO2
Larnite
Larnite-silica aerogel composites
Mineral sequestration
id ES_09b3963ea3e92d89f661c83834dd96fa
oai_identifier_str oai:idus.us.es:11441/95169
network_acronym_str ES
network_name_str España
repository_id_str
spelling Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonationSantos, AlbertoAjbary, MohamedMorales Flórez, VíctorKherbeche, AbdelhakPiñero, ManuelEsquivias Fedriani, Luis MaríaCarbonationCO2LarniteLarnite-silica aerogel compositesMineral sequestrationThis paper presents the results of the carbonation reaction of two sample types: larnite (Ca2SiO4) powders and larnite/silica aerogel composites, the larnite acting as an active phase in a process of direct mineral carbonation. First, larnite powders were synthesized by the reaction of colloidal silica and calcium nitrate in the presence of ethylene glycol. Then, to synthesize the composites, the surface of the larnite powders was chemically modified with 3-aminopropyltriethoxysilane (APTES), and later this mixture was added to a silica sol previously prepared from tetraethylorthosilicate (TEOS). The resulting humid gel was dried in an autoclave under supercritical conditions for the ethanol. The textures and chemical compositions of the powders and composites were characterized.The carbonation reaction of both types of samples was evaluated by means of X-ray diffraction and thermogravimetric analysis. Both techniques confirm the high efficiency of the reaction at room temperature and atmospheric pressure. A complete transformation of the silicate into carbonate resulted after submitting the samples to a flow of pure CO2 for 15 min. This indicates that for this reaction time, 1 t of larnite could eliminate about 550 kg of CO2. The grain size, porosity, and specific surface area are the factors controlling the reaction.Ministerio de Medio Ambiente A266/2007/3-11.1Ministerio de Educación y Ciencia MAT2005-01583ElsevierFísica de la Materia Condensada2009info:eu-repo/semantics/articleinfo:eu-repo/semantics/submittedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/95169https://doi.org/10.1016/j.jhazmat.2009.03.026reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésJournal of Hazardous Materials, 168 (2-3), 1397-1403.A266/2007/3-11.1MAT2005-01583http://dx.doi.org/10.1016/j.jhazmat.2009.03.026info:eu-repo/semantics/openAccessoai:idus.us.es:11441/951692026-06-17T12:51:07Z
dc.title.none.fl_str_mv Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation
title Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation
spellingShingle Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation
Santos, Alberto
Carbonation
CO2
Larnite
Larnite-silica aerogel composites
Mineral sequestration
title_short Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation
title_full Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation
title_fullStr Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation
title_full_unstemmed Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation
title_sort Larnite powders and larnite/silica aerogel composites as effective agents for CO2 sequestration by carbonation
dc.creator.none.fl_str_mv Santos, Alberto
Ajbary, Mohamed
Morales Flórez, Víctor
Kherbeche, Abdelhak
Piñero, Manuel
Esquivias Fedriani, Luis María
author Santos, Alberto
author_facet Santos, Alberto
Ajbary, Mohamed
Morales Flórez, Víctor
Kherbeche, Abdelhak
Piñero, Manuel
Esquivias Fedriani, Luis María
author_role author
author2 Ajbary, Mohamed
Morales Flórez, Víctor
Kherbeche, Abdelhak
Piñero, Manuel
Esquivias Fedriani, Luis María
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Física de la Materia Condensada
dc.subject.none.fl_str_mv Carbonation
CO2
Larnite
Larnite-silica aerogel composites
Mineral sequestration
topic Carbonation
CO2
Larnite
Larnite-silica aerogel composites
Mineral sequestration
description This paper presents the results of the carbonation reaction of two sample types: larnite (Ca2SiO4) powders and larnite/silica aerogel composites, the larnite acting as an active phase in a process of direct mineral carbonation. First, larnite powders were synthesized by the reaction of colloidal silica and calcium nitrate in the presence of ethylene glycol. Then, to synthesize the composites, the surface of the larnite powders was chemically modified with 3-aminopropyltriethoxysilane (APTES), and later this mixture was added to a silica sol previously prepared from tetraethylorthosilicate (TEOS). The resulting humid gel was dried in an autoclave under supercritical conditions for the ethanol. The textures and chemical compositions of the powders and composites were characterized.The carbonation reaction of both types of samples was evaluated by means of X-ray diffraction and thermogravimetric analysis. Both techniques confirm the high efficiency of the reaction at room temperature and atmospheric pressure. A complete transformation of the silicate into carbonate resulted after submitting the samples to a flow of pure CO2 for 15 min. This indicates that for this reaction time, 1 t of larnite could eliminate about 550 kg of CO2. The grain size, porosity, and specific surface area are the factors controlling the reaction.
publishDate 2009
dc.date.none.fl_str_mv 2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/95169
https://doi.org/10.1016/j.jhazmat.2009.03.026
url https://hdl.handle.net/11441/95169
https://doi.org/10.1016/j.jhazmat.2009.03.026
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Journal of Hazardous Materials, 168 (2-3), 1397-1403.
A266/2007/3-11.1
MAT2005-01583
http://dx.doi.org/10.1016/j.jhazmat.2009.03.026
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869403121330946048
score 15,301603

Similar Items