Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time

The aim of this work was to study the effect of two precipitation pHs and three different ageing times on the preparation of simple LaFeO3 perovskites for their use as catalysts in the methane combustion. Absorption atomic spectroscopy (AAS), BET specific area measurements, XRD analysis, Raman, XPS,...

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Autores principales:	PECCHI,GINA, REYES,PATRICIO, ZAMORA,RAÚL, CADÚS,LUIS E, BARBERO,BIBIANA P
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2006
Materias:	lanthanum orthoferrite perovskites combustion methane
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072006000400001
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spelling	oai:scielo:S0717-970720060004000012007-03-08Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing timePECCHI,GINAREYES,PATRICIOZAMORA,RAÚLCADÚS,LUIS EBARBERO,BIBIANA P lanthanum orthoferrite perovskites combustion methane The aim of this work was to study the effect of two precipitation pHs and three different ageing times on the preparation of simple LaFeO3 perovskites for their use as catalysts in the methane combustion. Absorption atomic spectroscopy (AAS), BET specific area measurements, XRD analysis, Raman, XPS, TGA and DTA analysis, TPR and TPO profiles revealed that significant changes in chemical composition, surface area and surface composition was produced at pH 8 when the ageing time was changed, leading to solids with different catalytic activity in methane combustion. At the higher precipitation pH studied, pH 10, the physical chemistry properties for all the samples obtained at different ageing times are almost identical, and therefore the solids exhibit similar activities in the combustion reaction. The catalysts were found to be active for methane combustion, and the effect of the perovskites structure and surface properties became more importantinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.51 n.4 20062006-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072006000400001en10.4067/S0717-97072006000400001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	lanthanum orthoferrite perovskites combustion methane
spellingShingle	lanthanum orthoferrite perovskites combustion methane PECCHI,GINA REYES,PATRICIO ZAMORA,RAÚL CADÚS,LUIS E BARBERO,BIBIANA P Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time
description	The aim of this work was to study the effect of two precipitation pHs and three different ageing times on the preparation of simple LaFeO3 perovskites for their use as catalysts in the methane combustion. Absorption atomic spectroscopy (AAS), BET specific area measurements, XRD analysis, Raman, XPS, TGA and DTA analysis, TPR and TPO profiles revealed that significant changes in chemical composition, surface area and surface composition was produced at pH 8 when the ageing time was changed, leading to solids with different catalytic activity in methane combustion. At the higher precipitation pH studied, pH 10, the physical chemistry properties for all the samples obtained at different ageing times are almost identical, and therefore the solids exhibit similar activities in the combustion reaction. The catalysts were found to be active for methane combustion, and the effect of the perovskites structure and surface properties became more important
author	PECCHI,GINA REYES,PATRICIO ZAMORA,RAÚL CADÚS,LUIS E BARBERO,BIBIANA P
author_facet	PECCHI,GINA REYES,PATRICIO ZAMORA,RAÚL CADÚS,LUIS E BARBERO,BIBIANA P
author_sort	PECCHI,GINA
title	Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time
title_short	Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time
title_full	Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time
title_fullStr	Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time
title_full_unstemmed	Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time
title_sort	catalytic combustion of methane over lafeo3 perovskites: the influence of coprecipitation ph and ageing time
publisher	Sociedad Chilena de Química
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072006000400001
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Catalytic combustion of methane over LaFeO3 perovskites: the influence of coprecipitation pH and ageing time

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