The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production
Authors
Janićijević, DejanaUskoković-Marković, Snežana

Popa, Alexandru

Nedić-Vasiljević, Bojana

Jevremović, Anka

Milojević-Rakić, Maja

Bajuk-Bogdanović, Danica

Article (Published version)

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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 dodecatungstophosphateSource:
Chemical Papers, 2021, 75, 3169-3180Publisher:
- Springer Science and Business Media Deutschland GmbH
Funding / projects:
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200146 (University of Belgrade, Faculty of Physical Chemistry) (RS-200146)
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 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
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Institution/Community
PharmacyTY - 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 VL - 75 SP - 3169 EP - 3180 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", 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", volume = "75", pages = "3169-3180", 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.. (2021). The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production. in Chemical Papers Springer Science and Business Media Deutschland GmbH., 75, 3169-3180. https://doi.org/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. in Chemical Papers. 2021;75:3169-3180. doi: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" in Chemical Papers, 75 (2021):3169-3180, https://doi.org/10.1007/s11696-021-01557-3 . .