New Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane

Elaboration of Pd-supported catalysts for catalytic combustion is, nowadays, considered as an imperative task to reduce the emissions of methane. This study provides new insight into the method of deposition, chemical state of Pd and oxygen storage capability of transition metal ions and their effec...

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Autores principales:	Silva Stanchovska, Georgy Ivanov, Sonya Harizanova, Krasimir Tenchev, Ekaterina Zhecheva, Anton Naydenov, Radostina Stoyanova
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	methane catalytic combustion palladium perovskite Mars-van Krevelen Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/437c9e938f5d463dadd68828ab2e96c0
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spelling	oai:doaj.org-article:437c9e938f5d463dadd68828ab2e96c02021-11-25T17:06:47ZNew Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane10.3390/catal111113992073-4344https://doaj.org/article/437c9e938f5d463dadd68828ab2e96c02021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1399https://doaj.org/toc/2073-4344Elaboration of Pd-supported catalysts for catalytic combustion is, nowadays, considered as an imperative task to reduce the emissions of methane. This study provides new insight into the method of deposition, chemical state of Pd and oxygen storage capability of transition metal ions and their effects on the catalytic reactivity of supported catalysts for the combustion of methane. The catalyst with nominal composition La(Co<sub>0.8</sub>Ni<sub>0.1</sub>Fe<sub>0.1</sub>)<sub>0.85</sub>Pd<sub>0.15</sub>O<sub>3</sub> was supported on SiO<sub>2</sub>-modified/γ-alumina using two synthetic procedures: (i) aerosol assisted chemical vapor deposition (U-AACVD) and (ii) wet impregnation (Imp). A comparative analysis shows that a higher catalytic activity is established for supported catalyst obtained by wet impregnation, where the PdO-like phase is well dispersed and the transition metal ions display a high oxygen storage capability. The reaction pathway over both catalysts proceeds most probably through Mars–van Krevelen mechanism. The supported catalysts are thermally stable when they are aged at 505 °C for 120 h in air containing 1.2 vol.% water vapor. Furthermore, the experimentally obtained data on La(Co<sub>0.8</sub>Ni<sub>0.1</sub>Fe<sub>0.1</sub>)<sub>0.85</sub>Pd<sub>0.15</sub>O<sub>3</sub>—based catalyst, supported on monolithic substrate VDM<sup>®</sup>Aluchrom Y Hf are simulated by using a two-dimensional heterogeneous model for monolithic reactor in order to predict the performance of an industrial catalytic reactor for abatement of methane emissions.Silva StanchovskaGeorgy IvanovSonya HarizanovaKrasimir TenchevEkaterina ZhechevaAnton NaydenovRadostina StoyanovaMDPI AGarticlemethanecatalytic combustionpalladiumperovskiteMars-van KrevelenChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1399, p 1399 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	methane catalytic combustion palladium perovskite Mars-van Krevelen Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	methane catalytic combustion palladium perovskite Mars-van Krevelen Chemical technology TP1-1185 Chemistry QD1-999 Silva Stanchovska Georgy Ivanov Sonya Harizanova Krasimir Tenchev Ekaterina Zhecheva Anton Naydenov Radostina Stoyanova New Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane
description	Elaboration of Pd-supported catalysts for catalytic combustion is, nowadays, considered as an imperative task to reduce the emissions of methane. This study provides new insight into the method of deposition, chemical state of Pd and oxygen storage capability of transition metal ions and their effects on the catalytic reactivity of supported catalysts for the combustion of methane. The catalyst with nominal composition La(Co<sub>0.8</sub>Ni<sub>0.1</sub>Fe<sub>0.1</sub>)<sub>0.85</sub>Pd<sub>0.15</sub>O<sub>3</sub> was supported on SiO<sub>2</sub>-modified/γ-alumina using two synthetic procedures: (i) aerosol assisted chemical vapor deposition (U-AACVD) and (ii) wet impregnation (Imp). A comparative analysis shows that a higher catalytic activity is established for supported catalyst obtained by wet impregnation, where the PdO-like phase is well dispersed and the transition metal ions display a high oxygen storage capability. The reaction pathway over both catalysts proceeds most probably through Mars–van Krevelen mechanism. The supported catalysts are thermally stable when they are aged at 505 °C for 120 h in air containing 1.2 vol.% water vapor. Furthermore, the experimentally obtained data on La(Co<sub>0.8</sub>Ni<sub>0.1</sub>Fe<sub>0.1</sub>)<sub>0.85</sub>Pd<sub>0.15</sub>O<sub>3</sub>—based catalyst, supported on monolithic substrate VDM<sup>®</sup>Aluchrom Y Hf are simulated by using a two-dimensional heterogeneous model for monolithic reactor in order to predict the performance of an industrial catalytic reactor for abatement of methane emissions.
format	article
author	Silva Stanchovska Georgy Ivanov Sonya Harizanova Krasimir Tenchev Ekaterina Zhecheva Anton Naydenov Radostina Stoyanova
author_facet	Silva Stanchovska Georgy Ivanov Sonya Harizanova Krasimir Tenchev Ekaterina Zhecheva Anton Naydenov Radostina Stoyanova
author_sort	Silva Stanchovska
title	New Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane
title_short	New Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane
title_full	New Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane
title_fullStr	New Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane
title_full_unstemmed	New Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane
title_sort	new insight into the interplay of method of deposition, chemical state of pd, oxygen storage capability and catalytic activity of pd-containing perovskite catalysts for combustion of methane
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/437c9e938f5d463dadd68828ab2e96c0
work_keys_str_mv	AT silvastanchovska newinsightintotheinterplayofmethodofdepositionchemicalstateofpdoxygenstoragecapabilityandcatalyticactivityofpdcontainingperovskitecatalystsforcombustionofmethane AT georgyivanov newinsightintotheinterplayofmethodofdepositionchemicalstateofpdoxygenstoragecapabilityandcatalyticactivityofpdcontainingperovskitecatalystsforcombustionofmethane AT sonyaharizanova newinsightintotheinterplayofmethodofdepositionchemicalstateofpdoxygenstoragecapabilityandcatalyticactivityofpdcontainingperovskitecatalystsforcombustionofmethane AT krasimirtenchev newinsightintotheinterplayofmethodofdepositionchemicalstateofpdoxygenstoragecapabilityandcatalyticactivityofpdcontainingperovskitecatalystsforcombustionofmethane AT ekaterinazhecheva newinsightintotheinterplayofmethodofdepositionchemicalstateofpdoxygenstoragecapabilityandcatalyticactivityofpdcontainingperovskitecatalystsforcombustionofmethane AT antonnaydenov newinsightintotheinterplayofmethodofdepositionchemicalstateofpdoxygenstoragecapabilityandcatalyticactivityofpdcontainingperovskitecatalystsforcombustionofmethane AT radostinastoyanova newinsightintotheinterplayofmethodofdepositionchemicalstateofpdoxygenstoragecapabilityandcatalyticactivityofpdcontainingperovskitecatalystsforcombustionofmethane
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New Insight into the Interplay of Method of Deposition, Chemical State of Pd, Oxygen Storage Capability and Catalytic Activity of Pd-Containing Perovskite Catalysts for Combustion of Methane

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