K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation

The exponential growth of greenhouse gas emissions and their associated climate change problems have motivated the development of strategies to reduce CO2 levels via CO2 capture and conversion. Reverse water gas shift (RWGS) reaction has been targeted as a promising pathway to convert CO2 into synga...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	J. Gandara-Loe, E. Portillo, J. A. Odriozola, T. R. Reina, L. Pastor-Pérez
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	CO2 valorisation alkali promoters Ni-based catalysts RWGS low temperature potassium Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/dfa38adc60f6428fbb7fe3a6f0d1621c
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:dfa38adc60f6428fbb7fe3a6f0d1621c
record_format	dspace
spelling	oai:doaj.org-article:dfa38adc60f6428fbb7fe3a6f0d1621c2021-11-18T05:55:23ZK-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation2296-264610.3389/fchem.2021.785571https://doaj.org/article/dfa38adc60f6428fbb7fe3a6f0d1621c2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fchem.2021.785571/fullhttps://doaj.org/toc/2296-2646The exponential growth of greenhouse gas emissions and their associated climate change problems have motivated the development of strategies to reduce CO2 levels via CO2 capture and conversion. Reverse water gas shift (RWGS) reaction has been targeted as a promising pathway to convert CO2 into syngas which is the primary reactive in several reactions to obtain high-value chemicals. Among the different catalysts reported for RWGS, the nickel-based catalyst has been proposed as an alternative to the expensive noble metal catalyst. However, Ni-based catalysts tend to be less active in RWGS reaction conditions due to preference to CO2 methanation reaction and to the sintering and coke formation. Due to this, the aim of this work is to study the effect of the potassium (K) in Ni/CeO2 catalyst seeking the optimal catalyst for low-temperature RWGS reaction. We synthesised Ni-based catalyst with different amounts of K:Ni ratio (0.5:10, 1:10, and 2:10) and fully characterised using different physicochemical techniques where was observed the modification on the surface characteristics as a function of the amount of K. Furthermore, it was observed an improvement in the CO selectivity at a lower temperature as a result of the K-Ni-support interactions but also a decrease on the CO2 conversion. The 1K catalyst presented the best compromise between CO2 conversion, suppression of CO2 methanation and enhancing CO selectivity. Finally, the experimental results were contrasted with the trends obtained from the thermodynamics process modelling observing that the result follows in good agreement with the modelling trends giving evidence of the promising behaviour of the designed catalysts in CO2 high-scale units.J. Gandara-LoeE. PortilloJ. A. OdriozolaJ. A. OdriozolaT. R. ReinaT. R. ReinaL. Pastor-PérezL. Pastor-PérezFrontiers Media S.A.articleCO2 valorisationalkali promotersNi-based catalystsRWGSlow temperaturepotassiumChemistryQD1-999ENFrontiers in Chemistry, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CO2 valorisation alkali promoters Ni-based catalysts RWGS low temperature potassium Chemistry QD1-999
spellingShingle	CO2 valorisation alkali promoters Ni-based catalysts RWGS low temperature potassium Chemistry QD1-999 J. Gandara-Loe E. Portillo J. A. Odriozola J. A. Odriozola T. R. Reina T. R. Reina L. Pastor-Pérez L. Pastor-Pérez K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation
description	The exponential growth of greenhouse gas emissions and their associated climate change problems have motivated the development of strategies to reduce CO2 levels via CO2 capture and conversion. Reverse water gas shift (RWGS) reaction has been targeted as a promising pathway to convert CO2 into syngas which is the primary reactive in several reactions to obtain high-value chemicals. Among the different catalysts reported for RWGS, the nickel-based catalyst has been proposed as an alternative to the expensive noble metal catalyst. However, Ni-based catalysts tend to be less active in RWGS reaction conditions due to preference to CO2 methanation reaction and to the sintering and coke formation. Due to this, the aim of this work is to study the effect of the potassium (K) in Ni/CeO2 catalyst seeking the optimal catalyst for low-temperature RWGS reaction. We synthesised Ni-based catalyst with different amounts of K:Ni ratio (0.5:10, 1:10, and 2:10) and fully characterised using different physicochemical techniques where was observed the modification on the surface characteristics as a function of the amount of K. Furthermore, it was observed an improvement in the CO selectivity at a lower temperature as a result of the K-Ni-support interactions but also a decrease on the CO2 conversion. The 1K catalyst presented the best compromise between CO2 conversion, suppression of CO2 methanation and enhancing CO selectivity. Finally, the experimental results were contrasted with the trends obtained from the thermodynamics process modelling observing that the result follows in good agreement with the modelling trends giving evidence of the promising behaviour of the designed catalysts in CO2 high-scale units.
format	article
author	J. Gandara-Loe E. Portillo J. A. Odriozola J. A. Odriozola T. R. Reina T. R. Reina L. Pastor-Pérez L. Pastor-Pérez
author_facet	J. Gandara-Loe E. Portillo J. A. Odriozola J. A. Odriozola T. R. Reina T. R. Reina L. Pastor-Pérez L. Pastor-Pérez
author_sort	J. Gandara-Loe
title	K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation
title_short	K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation
title_full	K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation
title_fullStr	K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation
title_full_unstemmed	K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation
title_sort	k-promoted ni-based catalysts for gas-phase co2 conversion: catalysts design and process modelling validation
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/dfa38adc60f6428fbb7fe3a6f0d1621c
work_keys_str_mv	AT jgandaraloe kpromotednibasedcatalystsforgasphaseco2conversioncatalystsdesignandprocessmodellingvalidation AT eportillo kpromotednibasedcatalystsforgasphaseco2conversioncatalystsdesignandprocessmodellingvalidation AT jaodriozola kpromotednibasedcatalystsforgasphaseco2conversioncatalystsdesignandprocessmodellingvalidation AT jaodriozola kpromotednibasedcatalystsforgasphaseco2conversioncatalystsdesignandprocessmodellingvalidation AT trreina kpromotednibasedcatalystsforgasphaseco2conversioncatalystsdesignandprocessmodellingvalidation AT trreina kpromotednibasedcatalystsforgasphaseco2conversioncatalystsdesignandprocessmodellingvalidation AT lpastorperez kpromotednibasedcatalystsforgasphaseco2conversioncatalystsdesignandprocessmodellingvalidation AT lpastorperez kpromotednibasedcatalystsforgasphaseco2conversioncatalystsdesignandprocessmodellingvalidation
_version_	1718424699609808896

K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation

Ejemplares similares