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The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production

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2021
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Authors
Janićijević, Dejana
Uskoković-Marković, Snežana
Popa, Alexandru
Nedić-Vasiljević, Bojana
Jevremović, Anka
Milojević-Rakić, Maja
Bajuk-Bogdanović, Danica
Article (Published version)
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Abstract
Heteropolyacids and their salts comprise catalytic centers for the production of ethylene, one of the most important constituents in the chemical industry. The paper emphasizes different synthesis routes of hybrid materials consisting of dodecatungstophosphoric acid silver salt (AgPW) and β zeolite—stepwise wet impregnation, silver-exchange in β zeolite, and dry mixing of precursors. Composite preparation procedures induced minor effects on the weak acid sites, while strong acid sites were increased significantly. β/AgPW composites prepared by two-steps wet impregnation and ion-exchange procedures have strong acid sites content and total acidity higher in comparison to the pure AgPW salt and β zeolite. This is a result of precursors synergetic effect—cumulative strong acidic sites are generated in the presence of well-dispersed Keggin ions on the zeolite network. Composite samples with a higher content of strong acid centers exhibit higher conversion in the ethanol dehydration reaction..., i.e., the ion-exchanged βAgPW sample has attained a conversion over 81%, while the wet-impregnated sample has a significant 86%. The distribution and presence of AgPW active phase are found to be crucial for both stable conversion and high selectivity results in ethylene production from ethanol, which is regarded as one of the most significant processes in environmental and sustainable industrial chemistry. Graphic abstract: [Figure not available: see fulltext.]

Keywords:
Ethanol dehydration / Beta zeolite / Composite samples / NH3-TDP / Silver dodecatungstophosphate
Source:
Chemical Papers, 2021
Publisher:
  • Springer Science and Business Media Deutschland GmbH
Projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200146 (University of Belgrade, Faculty of Physical Chemistry) (RS-200146)
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200161 (University of Belgrade, Faculty of Pharmacy) (RS-200161)
  • Romanian Academy Project No. 4.3. The authors are grateful to Prof. Dr. Slavko Mentus from University of Belgrade-Faculty of Physical Chemistry for DTA-TG measurements.

DOI: 10.1007/s11696-021-01557-3

ISSN: 0366-6352

WoS: 000619905500003

Scopus: 2-s2.0-85101220876
[ Google Scholar ]
URI
https://farfar.pharmacy.bg.ac.rs/handle/123456789/3792
Collections
  • Radovi istraživača / Researchers’ publications
Institution
Pharmacy
TY  - JOUR
AU  - Janićijević, Dejana
AU  - Uskoković-Marković, Snežana
AU  - Popa, Alexandru
AU  - Nedić-Vasiljević, Bojana
AU  - Jevremović, Anka
AU  - Milojević-Rakić, Maja
AU  - Bajuk-Bogdanović, Danica
PY  - 2021
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3792
AB  - Heteropolyacids and their salts comprise catalytic centers for the production of ethylene, one of the most important constituents in the chemical industry. The paper emphasizes different synthesis routes of hybrid materials consisting of dodecatungstophosphoric acid silver salt (AgPW) and β zeolite—stepwise wet impregnation, silver-exchange in β zeolite, and dry mixing of precursors. Composite preparation procedures induced minor effects on the weak acid sites, while strong acid sites were increased significantly. β/AgPW composites prepared by two-steps wet impregnation and ion-exchange procedures have strong acid sites content and total acidity higher in comparison to the pure AgPW salt and β zeolite. This is a result of precursors synergetic effect—cumulative strong acidic sites are generated in the presence of well-dispersed Keggin ions on the zeolite network. Composite samples with a higher content of strong acid centers exhibit higher conversion in the ethanol dehydration reaction, i.e., the ion-exchanged βAgPW sample has attained a conversion over 81%, while the wet-impregnated sample has a significant 86%. The distribution and presence of AgPW active phase are found to be crucial for both stable conversion and high selectivity results in ethylene production from ethanol, which is regarded as one of the most significant processes in environmental and sustainable industrial chemistry. Graphic abstract: [Figure not available: see fulltext.]
PB  - Springer Science and Business Media Deutschland GmbH
T2  - Chemical Papers
T1  - The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production
DO  - 10.1007/s11696-021-01557-3
ER  - 
@article{
author = "Janićijević, Dejana and Uskoković-Marković, Snežana and Popa, Alexandru and Nedić-Vasiljević, Bojana and Jevremović, Anka and Milojević-Rakić, Maja and Bajuk-Bogdanović, Danica",
year = "2021",
url = "https://farfar.pharmacy.bg.ac.rs/handle/123456789/3792",
abstract = "Heteropolyacids and their salts comprise catalytic centers for the production of ethylene, one of the most important constituents in the chemical industry. The paper emphasizes different synthesis routes of hybrid materials consisting of dodecatungstophosphoric acid silver salt (AgPW) and β zeolite—stepwise wet impregnation, silver-exchange in β zeolite, and dry mixing of precursors. Composite preparation procedures induced minor effects on the weak acid sites, while strong acid sites were increased significantly. β/AgPW composites prepared by two-steps wet impregnation and ion-exchange procedures have strong acid sites content and total acidity higher in comparison to the pure AgPW salt and β zeolite. This is a result of precursors synergetic effect—cumulative strong acidic sites are generated in the presence of well-dispersed Keggin ions on the zeolite network. Composite samples with a higher content of strong acid centers exhibit higher conversion in the ethanol dehydration reaction, i.e., the ion-exchanged βAgPW sample has attained a conversion over 81%, while the wet-impregnated sample has a significant 86%. The distribution and presence of AgPW active phase are found to be crucial for both stable conversion and high selectivity results in ethylene production from ethanol, which is regarded as one of the most significant processes in environmental and sustainable industrial chemistry. Graphic abstract: [Figure not available: see fulltext.]",
publisher = "Springer Science and Business Media Deutschland GmbH",
journal = "Chemical Papers",
title = "The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production",
doi = "10.1007/s11696-021-01557-3"
}
Janićijević D, Uskoković-Marković S, Popa A, Nedić-Vasiljević B, Jevremović A, Milojević-Rakić M, Bajuk-Bogdanović D. The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production. Chemical Papers. 2021;
Janićijević, D., Uskoković-Marković, S., Popa, A., Nedić-Vasiljević, B., Jevremović, A., Milojević-Rakić, M.,& Bajuk-Bogdanović, D. (2021). The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production.
Chemical PapersSpringer Science and Business Media Deutschland GmbH..
https://doi.org/10.1007/s11696-021-01557-3
Janićijević Dejana, Uskoković-Marković Snežana, Popa Alexandru, Nedić-Vasiljević Bojana, Jevremović Anka, Milojević-Rakić Maja, Bajuk-Bogdanović Danica, "The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production" (2021),
https://doi.org/10.1007/s11696-021-01557-3 .

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