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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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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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 |
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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 |
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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. |
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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 |
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Penerbit UTM Press |
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2016 |
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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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13.188404 |