SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATION

In this study, two types of beta zeolites with different Si/Al ratios (11.7 and 24.5) were synthesized hydrothermally using tetraethylammonium hydroxide (TEAOH) as the template. Different amounts of Platinum (0.2%, 0.5% and 1.2%) were loaded on the protonated form of zeolite by incipient wet impregn...

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Autores principales:	TALEBI,GOODARZ, SOHRABI,MORTEZA, KEISKI,RIITTA L., HUUHTANEN,MIKA, ROYAEE,SEID J., MAGHSOUDI,SAEED, IMAMVERDIZADEH,HAMID
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2008
Materias:	Hydroisomerization Beta zeolite Bifunctional catalysts n-Heptane
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100019
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spelling	oai:scielo:S0717-970720080001000192008-07-03SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATIONTALEBI,GOODARZSOHRABI,MORTEZAKEISKI,RIITTA L.HUUHTANEN,MIKAROYAEE,SEID J.MAGHSOUDI,SAEEDIMAMVERDIZADEH,HAMID Hydroisomerization Beta zeolite Bifunctional catalysts n-Heptane In this study, two types of beta zeolites with different Si/Al ratios (11.7 and 24.5) were synthesized hydrothermally using tetraethylammonium hydroxide (TEAOH) as the template. Different amounts of Platinum (0.2%, 0.5% and 1.2%) were loaded on the protonated form of zeolite by incipient wet impregnation method with hexachloroplatinic acid in 0.2N Cl" progressive ion solutions. Catalytic reactions were carried out at atmospheric pressure in a fixed bed reactor with vertical placing and downward flow at three different temperatures, various WHS V (weight hourly space velocity) and n-H2/n-HC (molar hydrogen / hydrocarbon) ratio (230, 250, 280 °C, 1.64, 2.48, 3.28 hr¹ and 6, 10, 14 respectively). Increasing the Si/Al ratio from 11.7 to 24.5 promoted the selectivity and yield. It was found that optimum platinum content depends on the Si/Al ratio (zeolite acidity) present in the zeolite catalyst. The monobranched to dibranched isomers ratio were correlated with a linear function of n-heptane conversion. Such a correlation was found to be valid for various Si/Al ratios, metal content, processing temperature and pressure, WHSV and hydrogen to hydrocarbon ratio. This observation may indicate that in isomerization reactions, the mono-branched isomers are first produced but subsequently transformed into multi-branched isomersinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.53 n.1 20082008-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100019en10.4067/S0717-97072008000100019
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Hydroisomerization Beta zeolite Bifunctional catalysts n-Heptane
spellingShingle	Hydroisomerization Beta zeolite Bifunctional catalysts n-Heptane TALEBI,GOODARZ SOHRABI,MORTEZA KEISKI,RIITTA L. HUUHTANEN,MIKA ROYAEE,SEID J. MAGHSOUDI,SAEED IMAMVERDIZADEH,HAMID SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATION
description	In this study, two types of beta zeolites with different Si/Al ratios (11.7 and 24.5) were synthesized hydrothermally using tetraethylammonium hydroxide (TEAOH) as the template. Different amounts of Platinum (0.2%, 0.5% and 1.2%) were loaded on the protonated form of zeolite by incipient wet impregnation method with hexachloroplatinic acid in 0.2N Cl" progressive ion solutions. Catalytic reactions were carried out at atmospheric pressure in a fixed bed reactor with vertical placing and downward flow at three different temperatures, various WHS V (weight hourly space velocity) and n-H2/n-HC (molar hydrogen / hydrocarbon) ratio (230, 250, 280 °C, 1.64, 2.48, 3.28 hr¹ and 6, 10, 14 respectively). Increasing the Si/Al ratio from 11.7 to 24.5 promoted the selectivity and yield. It was found that optimum platinum content depends on the Si/Al ratio (zeolite acidity) present in the zeolite catalyst. The monobranched to dibranched isomers ratio were correlated with a linear function of n-heptane conversion. Such a correlation was found to be valid for various Si/Al ratios, metal content, processing temperature and pressure, WHSV and hydrogen to hydrocarbon ratio. This observation may indicate that in isomerization reactions, the mono-branched isomers are first produced but subsequently transformed into multi-branched isomers
author	TALEBI,GOODARZ SOHRABI,MORTEZA KEISKI,RIITTA L. HUUHTANEN,MIKA ROYAEE,SEID J. MAGHSOUDI,SAEED IMAMVERDIZADEH,HAMID
author_facet	TALEBI,GOODARZ SOHRABI,MORTEZA KEISKI,RIITTA L. HUUHTANEN,MIKA ROYAEE,SEID J. MAGHSOUDI,SAEED IMAMVERDIZADEH,HAMID
author_sort	TALEBI,GOODARZ
title	SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATION
title_short	SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATION
title_full	SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATION
title_fullStr	SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATION
title_full_unstemmed	SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATION
title_sort	synthesis and determination of the properties of the bifunctional beta zeolite catalysts for n-heptane hydroisomerization
publisher	Sociedad Chilena de Química
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100019
work_keys_str_mv	AT talebigoodarz synthesisanddeterminationofthepropertiesofthebifunctionalbetazeolitecatalystsfornheptanehydroisomerization AT sohrabimorteza synthesisanddeterminationofthepropertiesofthebifunctionalbetazeolitecatalystsfornheptanehydroisomerization AT keiskiriittal synthesisanddeterminationofthepropertiesofthebifunctionalbetazeolitecatalystsfornheptanehydroisomerization AT huuhtanenmika synthesisanddeterminationofthepropertiesofthebifunctionalbetazeolitecatalystsfornheptanehydroisomerization AT royaeeseidj synthesisanddeterminationofthepropertiesofthebifunctionalbetazeolitecatalystsfornheptanehydroisomerization AT maghsoudisaeed synthesisanddeterminationofthepropertiesofthebifunctionalbetazeolitecatalystsfornheptanehydroisomerization AT imamverdizadehhamid synthesisanddeterminationofthepropertiesofthebifunctionalbetazeolitecatalystsfornheptanehydroisomerization
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SYNTHESIS AND DETERMINATION OF THE PROPERTIES OF THE BIFUNCTIONAL BETA ZEOLITE CATALYSTS FOR N-HEPTANE HYDROISOMERIZATION

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