SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATION

The citronellal hydrogenation was studied on Ir/Nb(2)0(5)-Si0(2) catalysts. Aseries of catalysts was synthesized with different niobia contents (Ir/Nl 1.10%; Ir/N2 2.54%; Ir/N3 3.25%; Ir/N4 5.30%wt%) using the wet impregnation method. These catalysts were reduced in hydrogen atmosphere at low or hig...

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Autores principales:	ROJAS,HUGO, BORDA,GLORIA, REYES,PATRICIO, CASTAÑEDA,JULIO CESAR, FIERRO,J.L.G
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2008
Materias:	Ir/Nb(2)0(5)/Si0(2) Catalysts citronellal hydrogenation cyclization isopulegol
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200003
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spelling	oai:scielo:S0717-970720080002000032009-06-09SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATIONROJAS,HUGOBORDA,GLORIAREYES,PATRICIOCASTAÑEDA,JULIO CESARFIERRO,J.L.G Ir/Nb(2)0(5)/Si0(2) Catalysts citronellal hydrogenation cyclization isopulegol The citronellal hydrogenation was studied on Ir/Nb(2)0(5)-Si0(2) catalysts. Aseries of catalysts was synthesized with different niobia contents (Ir/Nl 1.10%; Ir/N2 2.54%; Ir/N3 3.25%; Ir/N4 5.30%wt%) using the wet impregnation method. These catalysts were reduced in hydrogen atmosphere at low or high temperatures. 473K (LTR) or 773K respectively. Their structural and surface properties were investigated by XRD, TEM, XPS, DTP, FTIR, H2 chemisorption at 298 K and surface specific area by using the BET method. The X ray diffraction studies revealed only the peaks due to niobia, mainly in those with higher niobia loading. No diffraction lines due to Ir were observed due to its lower content and/or to its high dispersion. The catalytic tests in the hydrogenation of citronellal were carried out in a batch reactor operated at 6.2 bar of H2 and 343 K. All catalysts showed higher selectivity to isopulegol and to their products due to the cyclization of the citronellal molecule.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.53 n.2 20082008-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200003en10.4067/S0717-97072008000200003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ir/Nb(2)0(5)/Si0(2) Catalysts citronellal hydrogenation cyclization isopulegol
spellingShingle	Ir/Nb(2)0(5)/Si0(2) Catalysts citronellal hydrogenation cyclization isopulegol ROJAS,HUGO BORDA,GLORIA REYES,PATRICIO CASTAÑEDA,JULIO CESAR FIERRO,J.L.G SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATION
description	The citronellal hydrogenation was studied on Ir/Nb(2)0(5)-Si0(2) catalysts. Aseries of catalysts was synthesized with different niobia contents (Ir/Nl 1.10%; Ir/N2 2.54%; Ir/N3 3.25%; Ir/N4 5.30%wt%) using the wet impregnation method. These catalysts were reduced in hydrogen atmosphere at low or high temperatures. 473K (LTR) or 773K respectively. Their structural and surface properties were investigated by XRD, TEM, XPS, DTP, FTIR, H2 chemisorption at 298 K and surface specific area by using the BET method. The X ray diffraction studies revealed only the peaks due to niobia, mainly in those with higher niobia loading. No diffraction lines due to Ir were observed due to its lower content and/or to its high dispersion. The catalytic tests in the hydrogenation of citronellal were carried out in a batch reactor operated at 6.2 bar of H2 and 343 K. All catalysts showed higher selectivity to isopulegol and to their products due to the cyclization of the citronellal molecule.
author	ROJAS,HUGO BORDA,GLORIA REYES,PATRICIO CASTAÑEDA,JULIO CESAR FIERRO,J.L.G
author_facet	ROJAS,HUGO BORDA,GLORIA REYES,PATRICIO CASTAÑEDA,JULIO CESAR FIERRO,J.L.G
author_sort	ROJAS,HUGO
title	SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATION
title_short	SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATION
title_full	SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATION
title_fullStr	SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATION
title_full_unstemmed	SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATION
title_sort	synthesis, characterization and catalytic behavior of the ir/nb(2)0(5)/si0(2) system in the citronellal hydrogenation
publisher	Sociedad Chilena de Química
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000200003
work_keys_str_mv	AT rojashugo synthesischaracterizationandcatalyticbehavioroftheirnb205si02systeminthecitronellalhydrogenation AT bordagloria synthesischaracterizationandcatalyticbehavioroftheirnb205si02systeminthecitronellalhydrogenation AT reyespatricio synthesischaracterizationandcatalyticbehavioroftheirnb205si02systeminthecitronellalhydrogenation AT castanedajuliocesar synthesischaracterizationandcatalyticbehavioroftheirnb205si02systeminthecitronellalhydrogenation AT fierrojlg synthesischaracterizationandcatalyticbehavioroftheirnb205si02systeminthecitronellalhydrogenation
_version_	1718445385566912512

SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOR OF THE Ir/Nb(2)0(5)/Si0(2) SYSTEM IN THE CITRONELLAL HYDROGENATION

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