Acorn gasification char valorisation in the manufacture of alkali activated materials

The use of biomass for energy production is becoming increasingly common. An energy source with good prospects for the future is the gasification process of biomass waste. This process is characterized by the partial oxidation of the raw material at high temperatures, which converts the raw material...

Descripción completa

Detalles Bibliográficos
Autores: Gómez-Casero, Miguel Ángel, Calado, Luís, Romano, Pedro, Eliche-Quesada, Dolores
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Universidad de Jaén
Repositorio:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
OAI Identifier:oai:ruja.ujaen.es:10953/6102
Acceso en línea:https://www.sciencedirect.com/science/article/pii/S0950061823032506
https://hdl.handle.net/10953/6102
Access Level:acceso abierto
Palabra clave:Alkali activated cements
Acorn gasification char
Electric arc furnace slag
Circular economy
69
id ES_7366dc2bbbbc7042c2a9299c4fc54a24
oai_identifier_str oai:ruja.ujaen.es:10953/6102
network_acronym_str ES
network_name_str España
repository_id_str
spelling Acorn gasification char valorisation in the manufacture of alkali activated materialsGómez-Casero, Miguel ÁngelCalado, LuísRomano, PedroEliche-Quesada, DoloresAlkali activated cementsAcorn gasification charElectric arc furnace slagCircular economy69The use of biomass for energy production is becoming increasingly common. An energy source with good prospects for the future is the gasification process of biomass waste. This process is characterized by the partial oxidation of the raw material at high temperatures, which converts the raw material into a mixture of combustible gases. However, one of the problems when using biomass is the ash produced in the gasification process. This study investigates the effect of the incorporation of ash generated in the production of syngas from biomass residues from the acorn industry on the physical, mechanical and thermal performance of electric arc furnace slag (EAFS) based alkaline activated cements for industrial applications. Acorn gasification ash (AGA) after a calcination process were used to replace EAFS at different substitution ratios: 0, 25, 50, 75 and 100 wt%. The influence of the modulus of the activator (Ms = SiO2/K2O = 0.89; 1.38 and 1.84) was also studied. The specimens were evaluated for density, porosity, flexural and compressive strength, thermal conductivity, X-ray diffraction analysis, infrared spectroscopy, and microstructure development at 1, 7, 28 and 56 days of curing. The results showed that the inclusion of up to 50 wt% AGA gives rise to cements with similar or higher compressive strength than the control cement containing only EAFS. The optimum activator modulus depends on the proportion of precursors used, increasing with increasing AGA content. Therefore, the activator ratio and AGA content are factors that must be considered simultaneously to achieve the optimum compressive strength. The main reaction product was C-(A)-S-H gel, and to a lesser extent K-(A)-S-H gel and C-K-(A)-S-H hybrid gel. This work suggests the use of AGA improve alkali activated metallurgical slag binders, partially substituting the conventional Portland cement as structural material.This work has been funded by the project PID2020-115161RB-I00: Applying the circular economy in the development of new low carbon footprint alkaline activated hydraulic binders for construction solutions (CongActiva), MCIN/AEI/10.13039/501100011033 FEDER “A way of making Europe" and by the project MAT2017-88097-R: Development and characterization of new geopolymeric composites based on waste from the olive industry. Towards a sustainable construction, FEDER/Ministry of Science, Innovation and Universities, State Research Agency. Besides, it has been used acorn from LandFood project (PV20-0050) funded by La Caixa foundation. The author, M.A. Gómez-Casero, was supported by MINECO (PRE2018-084073).Elsevier202520252023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.sciencedirect.com/science/article/pii/S0950061823032506https://hdl.handle.net/10953/6102reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaéninstname:Universidad de JaénInglésConstruction and Building Materials, 407, 133533.Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ruja.ujaen.es:10953/61022026-06-24T12:41:07Z
dc.title.none.fl_str_mv Acorn gasification char valorisation in the manufacture of alkali activated materials
title Acorn gasification char valorisation in the manufacture of alkali activated materials
spellingShingle Acorn gasification char valorisation in the manufacture of alkali activated materials
Gómez-Casero, Miguel Ángel
Alkali activated cements
Acorn gasification char
Electric arc furnace slag
Circular economy
69
title_short Acorn gasification char valorisation in the manufacture of alkali activated materials
title_full Acorn gasification char valorisation in the manufacture of alkali activated materials
title_fullStr Acorn gasification char valorisation in the manufacture of alkali activated materials
title_full_unstemmed Acorn gasification char valorisation in the manufacture of alkali activated materials
title_sort Acorn gasification char valorisation in the manufacture of alkali activated materials
dc.creator.none.fl_str_mv Gómez-Casero, Miguel Ángel
Calado, Luís
Romano, Pedro
Eliche-Quesada, Dolores
author Gómez-Casero, Miguel Ángel
author_facet Gómez-Casero, Miguel Ángel
Calado, Luís
Romano, Pedro
Eliche-Quesada, Dolores
author_role author
author2 Calado, Luís
Romano, Pedro
Eliche-Quesada, Dolores
author2_role author
author
author
dc.subject.none.fl_str_mv Alkali activated cements
Acorn gasification char
Electric arc furnace slag
Circular economy
69
topic Alkali activated cements
Acorn gasification char
Electric arc furnace slag
Circular economy
69
description The use of biomass for energy production is becoming increasingly common. An energy source with good prospects for the future is the gasification process of biomass waste. This process is characterized by the partial oxidation of the raw material at high temperatures, which converts the raw material into a mixture of combustible gases. However, one of the problems when using biomass is the ash produced in the gasification process. This study investigates the effect of the incorporation of ash generated in the production of syngas from biomass residues from the acorn industry on the physical, mechanical and thermal performance of electric arc furnace slag (EAFS) based alkaline activated cements for industrial applications. Acorn gasification ash (AGA) after a calcination process were used to replace EAFS at different substitution ratios: 0, 25, 50, 75 and 100 wt%. The influence of the modulus of the activator (Ms = SiO2/K2O = 0.89; 1.38 and 1.84) was also studied. The specimens were evaluated for density, porosity, flexural and compressive strength, thermal conductivity, X-ray diffraction analysis, infrared spectroscopy, and microstructure development at 1, 7, 28 and 56 days of curing. The results showed that the inclusion of up to 50 wt% AGA gives rise to cements with similar or higher compressive strength than the control cement containing only EAFS. The optimum activator modulus depends on the proportion of precursors used, increasing with increasing AGA content. Therefore, the activator ratio and AGA content are factors that must be considered simultaneously to achieve the optimum compressive strength. The main reaction product was C-(A)-S-H gel, and to a lesser extent K-(A)-S-H gel and C-K-(A)-S-H hybrid gel. This work suggests the use of AGA improve alkali activated metallurgical slag binders, partially substituting the conventional Portland cement as structural material.
publishDate 2023
dc.date.none.fl_str_mv 2023
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.sciencedirect.com/science/article/pii/S0950061823032506
https://hdl.handle.net/10953/6102
url https://www.sciencedirect.com/science/article/pii/S0950061823032506
https://hdl.handle.net/10953/6102
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Construction and Building Materials, 407, 133533.
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
instname:Universidad de Jaén
instname_str Universidad de Jaén
reponame_str RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
collection RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869410807242031104
score 15,812429

Similares en LA Referencia