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The Role of Mesopores in Intracrystalline Transport in USY Zeolite: PFG NMR Diffusion Study on Various Length Scales
Abstract
PFG NMR has been applied to study intracrystalline diffusion in USY zeolite as well as in the parent ammonium-ion exchanged zeolite Y used to produce the USY by zeolite steaming. The diffusion studies have been performed for a broad range of molecular displacements and with two different types of probe molecules (n-octane and 1,3,5-triisopropylbenzene) having critical molecular diameters smaller and larger than the openings of the zeolite micropores. Our experimental data unambiguously show that, in contrast to what is usually assumed in the literature, the intracrystalline mesopores do not significantly affect intracrystalline diffusion in USY. This result indicates that the intracrystalline mesopores of USY zeolite do not form a connected network, which would allow diffusion through crystals only via mesopores.
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Citations
Cited by
Hierarchically Structured Zeolites: From Design to Application
Chen, L.-H., Sun, M.-H., Wang, Z., Yang, W., Xie, Z., & Su, B.-L. (2020) · Chemical Reviews · doi:10.1021/acs.chemrev.0c00016 · Cited by 724
Design of hierarchical zeolite catalysts by desilication
Verboekend, D., & Pérez-Ramírez, J. (2011) · Catalysis Science & Technology · doi:10.1039/c1cy00150g · Cited by 712
Tailored crystalline microporous materials by post-synthesis modification
Valtchev, V., Majano, G., Mintova, S., & Pérez-Ramírez, J. (2013) · Chem. Soc. Rev. · doi:10.1039/c2cs35196j · Cited by 478
Realizing the Commercial Potential of Hierarchical Zeolites: New Opportunities in Catalytic Cracking
Li, K., Valla, J., & Garcia‐Martinez, J. (2014) · ChemCatChem · doi:10.1002/cctc.201300345 · Cited by 470
Zaera, F. (2022) · Chemical Reviews · doi:10.1021/acs.chemrev.1c00905 · Cited by 425
Metadata
- Authors
- Kortunov, P., Vasenkov, S., Kärger, J., Valiullin, R., Gottschalk, P., Fé Elía, M., Perez, M., Stöcker, M., Drescher, B., McElhiney, G., Berger, C., Gläser, R., & Weitkamp, J.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-08-26
- Volume
- 127
- Issue
- 37
- Pages
- 13055-13059
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1965929734
- Cited by
- 232
- References
- 0
- FWCI
- 6.95
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Kortunov, P., Vasenkov, S., Kärger, J., Valiullin, R., Gottschalk, P., Fé Elía, M., Perez, M., Stöcker, M., Drescher, B., McElhiney, G., Berger, C., Gläser, R., & Weitkamp, J. (2005). The Role of Mesopores in Intracrystalline Transport in USY Zeolite: PFG NMR Diffusion Study on Various Length Scales. Journal of the American Chemical Society. https://doi.org/10.1021/ja053134r
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