Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano

ilustraciones, diagramas

Autores:: Cañón Alvarado, Michael

Tipo de recurso:

Fecha de publicación:: 2023

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:

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network_acronym_str	UNACIONAL2
network_name_str	Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv	Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano
dc.title.translated.eng.fl_str_mv	Development of dual catalysts based on dolomite for the capture and transformation of CO2 into methane
title	Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano
spellingShingle	Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano 540 - Química y ciencias afines::546 - Química inorgánica Catalisis Gases de combustión - medición Contaminación - medicones Catalysis Flue gases - meausurement Pollution - measurement Metanación de CO2 Dolomita Catalizadores duales Captura de CO2 DRIFT CO2 methanation, Dolomite Dual catalysts CO2 capture DRIFT
title_short	Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano
title_full	Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano
title_fullStr	Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano
title_full_unstemmed	Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano
title_sort	Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano
dc.creator.fl_str_mv	Cañón Alvarado, Michael
dc.contributor.advisor.none.fl_str_mv	Daza Velásquez, Carlos Enrique
dc.contributor.author.none.fl_str_mv	Cañón Alvarado, Michael
dc.contributor.researchgroup.spa.fl_str_mv	Estado sólido y catálisis ambiental ESCA
dc.contributor.cvlac.spa.fl_str_mv	Cañón Alvarado, Michael [https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0000046278]
dc.subject.ddc.spa.fl_str_mv	540 - Química y ciencias afines::546 - Química inorgánica
topic	540 - Química y ciencias afines::546 - Química inorgánica Catalisis Gases de combustión - medición Contaminación - medicones Catalysis Flue gases - meausurement Pollution - measurement Metanación de CO2 Dolomita Catalizadores duales Captura de CO2 DRIFT CO2 methanation, Dolomite Dual catalysts CO2 capture DRIFT
dc.subject.lemb.spa.fl_str_mv	Catalisis Gases de combustión - medición Contaminación - medicones
dc.subject.lemb.eng.fl_str_mv	Catalysis Flue gases - meausurement Pollution - measurement
dc.subject.proposal.spa.fl_str_mv	Metanación de CO2 Dolomita Catalizadores duales Captura de CO2 DRIFT
dc.subject.proposal.eng.fl_str_mv	CO2 methanation, Dolomite Dual catalysts CO2 capture DRIFT
description	ilustraciones, diagramas
publishDate	2023
dc.date.accessioned.none.fl_str_mv	2023-11-07T19:46:05Z
dc.date.available.none.fl_str_mv	2023-11-07T19:46:05Z
dc.date.issued.none.fl_str_mv	2023-11-02
dc.type.spa.fl_str_mv	Trabajo de grado - Maestría
dc.type.driver.spa.fl_str_mv	info:eu-repo/semantics/masterThesis
dc.type.version.spa.fl_str_mv	info:eu-repo/semantics/acceptedVersion
dc.type.content.spa.fl_str_mv	Text
dc.type.redcol.spa.fl_str_mv	http://purl.org/redcol/resource_type/TM
status_str	acceptedVersion
dc.identifier.uri.none.fl_str_mv	https://repositorio.unal.edu.co/handle/unal/84900
dc.identifier.instname.spa.fl_str_mv	Universidad Nacional de Colombia
dc.identifier.reponame.spa.fl_str_mv	Repositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourl.spa.fl_str_mv	https://repositorio.unal.edu.co/
url	https://repositorio.unal.edu.co/handle/unal/84900 https://repositorio.unal.edu.co/
identifier_str_mv	Universidad Nacional de Colombia Repositorio Institucional Universidad Nacional de Colombia
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dc.publisher.spa.fl_str_mv	Universidad Nacional de Colombia
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spelling	Atribución-NoComercial 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Daza Velásquez, Carlos Enrique570beab15b4d630adc94c5b455f359ecCañón Alvarado, Michael2c5c59731944f8e790b5e3b20fc08bf2Estado sólido y catálisis ambiental ESCACañón Alvarado, Michael [https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0000046278]2023-11-07T19:46:05Z2023-11-07T19:46:05Z2023-11-02https://repositorio.unal.edu.co/handle/unal/84900Universidad Nacional de ColombiaRepositorio Institucional Universidad Nacional de Colombiahttps://repositorio.unal.edu.co/ilustraciones, diagramasLa mitigación y la reducción de las emisiones de CO2 son de vital importancia para combatir el cambio climático. Una prometedora estrategia para esta lucha es la metanación de CO2 para producir metano como una potencial fuente de energía sostenible. En la investigación desarrollada para esta tesis de maestría, se sintetizaron catalizadores duales de níquel (Ni) soportados sobre una dolomita calcinada modificada con aluminio (Al) utilizando como material de partida un mineral natural. Se obtuvieron catalizadores impregnados con diferentes cargas de Ni (5, 10, 20% y 30% en masa) y se realizó una caracterización exhaustiva para evaluar las características estructurales, morfológicas, químicas y texturales del soporte y los catalizadores, así como su idoneidad para la captura de CO2 y su conversión hasta metano. Se observó que el tratamiento con 3% en masa de Al en la dolomita calcinada aumentó la estabilidad térmica, limitó la sinterización e incrementó el área superficial pasando de 16 a 39 m2∙g-1. Se utilizaron diferentes técnicas para describir la basicidad y la captura de CO2 de los catalizadores. Los sólidos presentaron capacidades de captura de CO2 medida por TGA a 400 °C entre 100 y 800 μmol∙g-1 encontrándose que con un aumento en la carga de Ni en los catalizadores, esta característica disminuye debido a la reducción de sitios básicos disponibles. Los análisis mediante TPD-CO2 revelaron que el CO2 capturado se encuentra en diferentes tipos de sitios básicos, especialmente en los sitios fuertes y se observa la fácil formación de carbonatos de alta estabilidad térmica. Los catalizadores demostraron conversiones catalíticas de CO2 a 400 °C con velocidades de WHSV: 12 Lg-1h-1 y GHSV: 1915 h-1, superiores al 50% para las cargas más altas de Ni (30% y 20%) y ligeramente inferiores al 50% para las cargas más bajas (10% y 5%). Esto indica que los catalizadores son activos en la reacción de metanación de CO2 y, combinados con su capacidad de captura de CO2, demuestran una capacidad dual efectiva. Los ensayos catalíticos demostraron que los catalizadores son 100 % selectivos a metano ya que fue demostrada la ausencia de CO o de coque y presentan rendimientos hasta del 60 % los cuales son dependientes de la carga de Ni. En este trabajo, se realizó un estudio de la reacción por la técnica DRIFT in situ y Operando con el fin de contribuir a la descripción del mecanismo de la reacción usando este tipo de catalizadores. Se realizaron experimentos en función del tiempo, de la temperatura y un experimento Operando. La técnica permitió identificar la formación de carbonatos estables sobre los catalizadores y su transformación en especies formiato, grupos metoxi y formilo que son intermediarias para la formación de metano. Los resultados señalan que el mecanismo que se sigue es el de la ruta del formiato lo cual explica la ausencia de CO y la selectividad total lograda. (Texto tomado de la fuente)Mitigation and reduction of CO2 emissions are of vital importance in the fight against climate change. A promising strategy for this battle is CO2 methanation to produce methane as a potential source of sustainable energy. In the research conducted for this master's thesis, dual nickel (Ni) catalysts supported on calcined dolomite modified with aluminum (Al) were synthesized using a natural mineral as the starting material. Catalysts impregnated with different Ni loads (5%, 10%, 20%, and 30% by weight) were obtained, and an exhaustive characterization was performed to evaluate the structural, morphological, chemical, and textural characteristics of the support and catalysts, as well as their suitability for CO2 capture and conversion to methane. It was seen that treatment with 3% by weight of Al in calcined dolomite increased thermal stability, limited sintering, and increased the specific surface area from 16 to 39 m2∙g-1. Various techniques were employed to describe the basicity and CO2 capture capacity of the catalysts. The solids showed CO2 capture capacities measured by TGA at 400 °C ranging from 100 to 800 μmol∙g-1, and it was found that with an increase in the Ni loading in the catalysts, this feature decreased due to the reduction of available basic sites. TPD-CO2 analyses revealed that the captured CO2 was found in different types of basic sites, especially in strong sites, and the easy formation of thermally stable carbonates was observed. The catalysts demonstrated catalytic CO2 conversions at 400 °C with WHSV rates of 12 Lg-1h-1 and GHSV rates of 1915 h-1, exceeding 50% for higher Ni loadings (30% and 20%) and slightly below 50% for lower loadings (10% and 5%). This indicates that the catalysts are active in the CO2 methanation reaction and, combined with their CO2 capture capacity, they demonstrate effective dual functionality. Catalytic tests showed that the catalysts are 100% selective to methane, as evidenced by the absence of CO or coke, and they exhibited yields of up to 60%, which depend on the Ni loading. In this work, an in situ and Operando study of the reaction was conducted using the DRIFT technique to contribute to the description of the reaction mechanism using these types of catalysts. Experiments were performed as a function of time, temperature, and an Operando experiment. The technique allowed the identification of the formation of stable carbonates on the catalysts and their transformation into formiate, methoxy, and formyl species, which are intermediates for methane formation. The results show that the mechanism followed is the formiate route, which explains the absence of CO and the achieved total selectivity to methane.MaestríaMagíster en Ciencias - Químicaxiv, 103 páginasapplication/pdfUniversidad Nacional de ColombiaBogotá - Ciencias - Maestría en Ciencias - QuímicaFacultad de CienciasBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá540 - Química y ciencias afines::546 - Química inorgánicaCatalisisGases de combustión - mediciónContaminación - mediconesCatalysisFlue gases - meausurementPollution - measurementMetanación de CO2DolomitaCatalizadores dualesCaptura de CO2DRIFTCO2 methanation,DolomiteDual catalystsCO2 captureDRIFTDesarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metanoDevelopment of dual catalysts based on dolomite for the capture and transformation of CO2 into methaneTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TMA. 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Liang et al., “Methanation of CO2 over nickel catalysts: Impacts of acidic/basic sites on formation of the reaction intermediates,” Fuel, vol. 262, Feb. 2020, doi: 10.1016/j.fuel.2019.116521.Público generalLICENSElicense.txtlicense.txttext/plain; charset=utf-85879https://repositorio.unal.edu.co/bitstream/unal/84900/3/license.txteb34b1cf90b7e1103fc9dfd26be24b4aMD53ORIGINAL1010211502.2023.pdf1010211502.2023.pdfTesis de Maestría en Ciencias - Químicaapplication/pdf3998557https://repositorio.unal.edu.co/bitstream/unal/84900/4/1010211502.2023.pdffb4dd9a16aa32e12f64f1ff99d4fb505MD54THUMBNAIL1010211502.2023.pdf.jpg1010211502.2023.pdf.jpgGenerated Thumbnailimage/jpeg4696https://repositorio.unal.edu.co/bitstream/unal/84900/5/1010211502.2023.pdf.jpgc6c0b4060b090924d8f3058a60530f14MD55unal/84900oai:repositorio.unal.edu.co:unal/849002023-11-07 23:06:22.485Repositorio Institucional Universidad Nacional de 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Desarrollo de catalizadores duales a base de dolomita para la captura y transformación de CO2 en metano

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