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The effect of sulfate ion on the isomerization of n-butane to iso-butane

The effect of sulfate ion (SO2-4) loading on the properties of Pt/SO2-4-ZrO2 and on the catalytic isomerization of n-butane to iso-butane was studied. The catalyst was prepared by impregnation of Zr(OH)4 with H2SO4 and platinum solution followed by calcination at 600 °C. Ammonia TPD and FT-IR were...

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Main Authors: Triwahyono, Sugeng, Abdullah, Zalizawati, Abdul Jalil, Aishah
Format: Article
Published: Kexue Chubaneshe/Science Press 2006
Subjects:
QD Chemistry
Online Access:http://eprints.utm.my/id/eprint/9005/
http://dx.doi.org/10.1016/S1003-9953(07)60001-2
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spelling my.utm.90052010-06-24T07:45:09Z http://eprints.utm.my/id/eprint/9005/ The effect of sulfate ion on the isomerization of n-butane to iso-butane Triwahyono, Sugeng Abdullah, Zalizawati Abdul Jalil, Aishah QD Chemistry The effect of sulfate ion (SO2-4) loading on the properties of Pt/SO2-4-ZrO2 and on the catalytic isomerization of n-butane to iso-butane was studied. The catalyst was prepared by impregnation of Zr(OH)4 with H2SO4 and platinum solution followed by calcination at 600 °C. Ammonia TPD and FT-IR were used to confirm the distribution of acid sites and the structure of the sulfate species. Nitrogen physisorption and X-ray diffraction were used to confirm the physical structures of Pt/SO2-4-ZrO2. XRD pattern showed that the presence of sulfate ion stabilized the metastable tetragonal phase of zirconia and hindered the transition of amorphous phase to monoclinic phase of zirconia. Ammonia TPD profiles indicated the distributions of weak and medium acid sites observed on 0.1 N and 1.0 N sulfate in the loaded catalysts. The addition of 2.0 N and 4.0 N sulfate ion generated strong acid site and decreased the weak and medium acid sites. However, the XRD results and the specific surface area of the catalysts indicated that the excessive amount of sulfate ion collapsed the structure of the catalyst. The catalysts showed high activity and stability for isomerization of n-butane to iso-butane at 200 °C under hydrogen atmosphere. The conversion of n-butane to iso-butane per specific surface area of the catalyst increased with the increasing amount of sulfate ion owing to the existence of the bidentate sulfate and/or polynucleic sulfate species ((ZrO)2SO2), which acts as an active site for the isomerization. Kexue Chubaneshe/Science Press 2006 Article PeerReviewed Triwahyono, Sugeng and Abdullah, Zalizawati and Abdul Jalil, Aishah (2006) The effect of sulfate ion on the isomerization of n-butane to iso-butane. Journal of Natural Gas Chemistry , 15 (4). pp. 247-252. ISSN 1003-9953 http://dx.doi.org/10.1016/S1003-9953(07)60001-2 doi:10.1016/S1003-9953(07)60001-2
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic QD Chemistry
spellingShingle QD Chemistry
Triwahyono, Sugeng
Abdullah, Zalizawati
Abdul Jalil, Aishah
The effect of sulfate ion on the isomerization of n-butane to iso-butane
description The effect of sulfate ion (SO2-4) loading on the properties of Pt/SO2-4-ZrO2 and on the catalytic isomerization of n-butane to iso-butane was studied. The catalyst was prepared by impregnation of Zr(OH)4 with H2SO4 and platinum solution followed by calcination at 600 °C. Ammonia TPD and FT-IR were used to confirm the distribution of acid sites and the structure of the sulfate species. Nitrogen physisorption and X-ray diffraction were used to confirm the physical structures of Pt/SO2-4-ZrO2. XRD pattern showed that the presence of sulfate ion stabilized the metastable tetragonal phase of zirconia and hindered the transition of amorphous phase to monoclinic phase of zirconia. Ammonia TPD profiles indicated the distributions of weak and medium acid sites observed on 0.1 N and 1.0 N sulfate in the loaded catalysts. The addition of 2.0 N and 4.0 N sulfate ion generated strong acid site and decreased the weak and medium acid sites. However, the XRD results and the specific surface area of the catalysts indicated that the excessive amount of sulfate ion collapsed the structure of the catalyst. The catalysts showed high activity and stability for isomerization of n-butane to iso-butane at 200 °C under hydrogen atmosphere. The conversion of n-butane to iso-butane per specific surface area of the catalyst increased with the increasing amount of sulfate ion owing to the existence of the bidentate sulfate and/or polynucleic sulfate species ((ZrO)2SO2), which acts as an active site for the isomerization.
format Article
author Triwahyono, Sugeng
Abdullah, Zalizawati
Abdul Jalil, Aishah
author_facet Triwahyono, Sugeng
Abdullah, Zalizawati
Abdul Jalil, Aishah
author_sort Triwahyono, Sugeng
title The effect of sulfate ion on the isomerization of n-butane to iso-butane
title_short The effect of sulfate ion on the isomerization of n-butane to iso-butane
title_full The effect of sulfate ion on the isomerization of n-butane to iso-butane
title_fullStr The effect of sulfate ion on the isomerization of n-butane to iso-butane
title_full_unstemmed The effect of sulfate ion on the isomerization of n-butane to iso-butane
title_sort effect of sulfate ion on the isomerization of n-butane to iso-butane
publisher Kexue Chubaneshe/Science Press
publishDate 2006
url http://eprints.utm.my/id/eprint/9005/
http://dx.doi.org/10.1016/S1003-9953(07)60001-2
_version_ 1643645093656133632
score 13.211869

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