KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYST

A kinetic study of citral hydrogenation over an Au-Ir/TiO2 catalyst was performed with the aim to understand the effect of iridium on gold in this catalytic system. Au-Ir/TiO2 catalyst was prepared by co-deposition precipitation in an atomic ratio of 3/1. The effect of citral concentration, hydrogen...

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Auteurs principaux:	MARTÍNEZ,JOSÉ J, ROJAS,HUGO, REYES,PATRICIO
Langue:	English
Publié:	Sociedad Chilena de Química 2013
Sujets:	Citral Au- Ir catalyst kinetic study
Accès en ligne:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000300001
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spelling	oai:scielo:S0717-970720130003000012014-09-09KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYSTMARTÍNEZ,JOSÉ JROJAS,HUGOREYES,PATRICIO Citral Au- Ir catalyst kinetic study A kinetic study of citral hydrogenation over an Au-Ir/TiO2 catalyst was performed with the aim to understand the effect of iridium on gold in this catalytic system. Au-Ir/TiO2 catalyst was prepared by co-deposition precipitation in an atomic ratio of 3/1. The effect of citral concentration, hydrogen pressure and temperature effect were also studied. The product distribution obtained is related with the proportion of Meδ+/Me0 sites. The deactivation of the catalyst occurs in the whole studied temperature range, 363 to 403 K, being more drastic as temperature increases due to the irreversible adsorbed CO blocks principally Ir0 sites. From initial reaction rates treatment an apparent global order close to 1 was determined. A Langmuir-Hinshelwood-type kinetic model involving the surface reaction as the rate limiting step between adsorbed citral and hydrogen on active sites with different nature shows good agreement with experimental initial reaction rates.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.58 n.3 20132013-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000300001en10.4067/S0717-97072013000300001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Citral Au- Ir catalyst kinetic study
spellingShingle	Citral Au- Ir catalyst kinetic study MARTÍNEZ,JOSÉ J ROJAS,HUGO REYES,PATRICIO KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYST
description	A kinetic study of citral hydrogenation over an Au-Ir/TiO2 catalyst was performed with the aim to understand the effect of iridium on gold in this catalytic system. Au-Ir/TiO2 catalyst was prepared by co-deposition precipitation in an atomic ratio of 3/1. The effect of citral concentration, hydrogen pressure and temperature effect were also studied. The product distribution obtained is related with the proportion of Meδ+/Me0 sites. The deactivation of the catalyst occurs in the whole studied temperature range, 363 to 403 K, being more drastic as temperature increases due to the irreversible adsorbed CO blocks principally Ir0 sites. From initial reaction rates treatment an apparent global order close to 1 was determined. A Langmuir-Hinshelwood-type kinetic model involving the surface reaction as the rate limiting step between adsorbed citral and hydrogen on active sites with different nature shows good agreement with experimental initial reaction rates.
author	MARTÍNEZ,JOSÉ J ROJAS,HUGO REYES,PATRICIO
author_facet	MARTÍNEZ,JOSÉ J ROJAS,HUGO REYES,PATRICIO
author_sort	MARTÍNEZ,JOSÉ J
title	KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYST
title_short	KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYST
title_full	KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYST
title_fullStr	KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYST
title_full_unstemmed	KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYST
title_sort	kinetic study of the hydrogenation of citral on ir promoted au/tio2 catalyst
publisher	Sociedad Chilena de Química
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000300001
work_keys_str_mv	AT martinezjosej kineticstudyofthehydrogenationofcitralonirpromotedautio2catalyst AT rojashugo kineticstudyofthehydrogenationofcitralonirpromotedautio2catalyst AT reyespatricio kineticstudyofthehydrogenationofcitralonirpromotedautio2catalyst
_version_	1718445490573410304

KINETIC STUDY OF THE HYDROGENATION OF CITRAL ON Ir PROMOTED Au/TiO2 CATALYST

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