The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites

Lewis and Brönsted acidity were studied on ZSM-5 with combination of pyridine adsorption and FTIR vibration, ZSM-5 synthesized using kaolin Bangka Indonesia with an increase in the molar ratio of Si/Al 30-60 without pre-treatment and without organic templates and with seeds silicalite. Interestingly...

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Main Authors: Hartanto, D., Yuan, L. S., Mutia Sari, S., Sugiarso, D., Kris Murwarni, I., Ersam, T., Prasetyoko, D., Nur, H.
Format: Article
Language:English
Published: Penerbit UTM Press 2016
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Online Access:http://eprints.utm.my/id/eprint/72478/1/DjokoHartanto2016_TheUseoftheCombinationOfFTIRPyridine.pdf
http://eprints.utm.my/id/eprint/72478/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971467527&doi=10.11113%2fjt.v78.8821&partnerID=40&md5=677c07ac3716908e02ef75e7323389a3
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spelling my.utm.724782017-11-26T03:37:05Z http://eprints.utm.my/id/eprint/72478/ The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites Hartanto, D. Yuan, L. S. Mutia Sari, S. Sugiarso, D. Kris Murwarni, I. Ersam, T. Prasetyoko, D. Nur, H. QD Chemistry Lewis and Brönsted acidity were studied on ZSM-5 with combination of pyridine adsorption and FTIR vibration, ZSM-5 synthesized using kaolin Bangka Indonesia with an increase in the molar ratio of Si/Al 30-60 without pre-treatment and without organic templates and with seeds silicalite. Interestingly, the intensity of the infrared showed an increase of band vibration pyridine as absorbed Brönsted and Lewis acid sites in a molar ratio increase of Si/Al in ZSM-5, indicating an increase in the number of silanol (Brönsted acid) and deformed silica (Lewis acid) because the amount of Aluminum in ZSM-5 decrease with increase Si/Al but amount acidity increase. 29Si and 27Al MAS NMR analysis was supported by the results of infrared to indicate that all of the aluminum atom is coordinated with their neighbors are the same in ordering the ZSM-5 framework and 27Al MAS NMR showed a sharp peak of all the variations of Si/Al except the Si/Al 30 shows a low peak area. XRD analysis supported that the ZSM-5 structure formed is pure and crystal and a decrease in crystallinity proven for more than Si/Al 50, that defects silica occurs in ZSM-5, this corresponds to the growing number of Lewis acid sites caused by defects silica described the infrared results. Penerbit UTM Press 2016 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/72478/1/DjokoHartanto2016_TheUseoftheCombinationOfFTIRPyridine.pdf Hartanto, D. and Yuan, L. S. and Mutia Sari, S. and Sugiarso, D. and Kris Murwarni, I. and Ersam, T. and Prasetyoko, D. and Nur, H. (2016) The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites. Jurnal Teknologi, 78 (6). pp. 223-228. ISSN 0127-9696 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971467527&doi=10.11113%2fjt.v78.8821&partnerID=40&md5=677c07ac3716908e02ef75e7323389a3
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/
language English
topic QD Chemistry
spellingShingle QD Chemistry
Hartanto, D.
Yuan, L. S.
Mutia Sari, S.
Sugiarso, D.
Kris Murwarni, I.
Ersam, T.
Prasetyoko, D.
Nur, H.
The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites
description Lewis and Brönsted acidity were studied on ZSM-5 with combination of pyridine adsorption and FTIR vibration, ZSM-5 synthesized using kaolin Bangka Indonesia with an increase in the molar ratio of Si/Al 30-60 without pre-treatment and without organic templates and with seeds silicalite. Interestingly, the intensity of the infrared showed an increase of band vibration pyridine as absorbed Brönsted and Lewis acid sites in a molar ratio increase of Si/Al in ZSM-5, indicating an increase in the number of silanol (Brönsted acid) and deformed silica (Lewis acid) because the amount of Aluminum in ZSM-5 decrease with increase Si/Al but amount acidity increase. 29Si and 27Al MAS NMR analysis was supported by the results of infrared to indicate that all of the aluminum atom is coordinated with their neighbors are the same in ordering the ZSM-5 framework and 27Al MAS NMR showed a sharp peak of all the variations of Si/Al except the Si/Al 30 shows a low peak area. XRD analysis supported that the ZSM-5 structure formed is pure and crystal and a decrease in crystallinity proven for more than Si/Al 50, that defects silica occurs in ZSM-5, this corresponds to the growing number of Lewis acid sites caused by defects silica described the infrared results.
format Article
author Hartanto, D.
Yuan, L. S.
Mutia Sari, S.
Sugiarso, D.
Kris Murwarni, I.
Ersam, T.
Prasetyoko, D.
Nur, H.
author_facet Hartanto, D.
Yuan, L. S.
Mutia Sari, S.
Sugiarso, D.
Kris Murwarni, I.
Ersam, T.
Prasetyoko, D.
Nur, H.
author_sort Hartanto, D.
title The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites
title_short The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites
title_full The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites
title_fullStr The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites
title_full_unstemmed The use of the combination of ftir, Pyridine adsorption, 27Al and 29Si MAS NMR to determine the Brönsted and lewis acidic sites
title_sort use of the combination of ftir, pyridine adsorption, 27al and 29si mas nmr to determine the brönsted and lewis acidic sites
publisher Penerbit UTM Press
publishDate 2016
url http://eprints.utm.my/id/eprint/72478/1/DjokoHartanto2016_TheUseoftheCombinationOfFTIRPyridine.pdf
http://eprints.utm.my/id/eprint/72478/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971467527&doi=10.11113%2fjt.v78.8821&partnerID=40&md5=677c07ac3716908e02ef75e7323389a3
_version_ 1643656452723703808
score 13.188404