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Al-Rich Zeolite Beta by Seeding in the Absence of Organic Template
Abstract
Low- and no-template precursor suspensions are studied to clarify the effects of Si/Al ratio, seed content, heating temperature, and crystallization time on the syntheses of Al-rich zeolite Beta. Syntheses using 2.5 wt % seeds resulted in well-shaped octahedral Al-rich Beta crystals with sizes between 0.4 and 1 μm after either 6 days hydrothermal treatment at 125 °C or 12 days at 100 °C. The crystalline Beta product has Si/Al ratios as low as 3.9 (16.4 Al atoms per unit cell), which are comparable to the natural counterpart of zeolite Beta, the mineral Tschernichite, and give the material high hydrophilic properties. The tetrahedral coordination of aluminum in the Al-rich Beta and their stability upon calcinations is demonstrated by NMR spectroscopy and TG analysis. The seed method opens new perspective in the development of economically and environmentally friendly synthesis approach for Al-rich zeolite Beta, where the amount of organic template is reduced significantly.
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Cites
Emeis, C. A. (1993) · Journal of Catalysis · doi:10.1006/jcat.1993.1145 · Cited by 3,084
Organotemplate-Free and Fast Route for Synthesizing Beta Zeolite
Xie, B., Song, J., Ren, L., Ji, Y., Li, J., & Xiao, F.-S. (2008) · Chemistry of Materials · doi:10.1021/cm801167e · Cited by 301
Cited by
Green Routes for Synthesis of Zeolites
Meng, X., & Xiao, F.-S. (2014) · Chemical Reviews · doi:10.1021/cr4001513 · Cited by 635
New trends in tailoring active sites in zeolite-based catalysts
Shamzhy, M., Opanasenko, M., Concepción, P., & Martínez, A. (2019) · Chemical Society Reviews · doi:10.1039/c8cs00887f · Cited by 508
Regulation of the Si/Al ratios and Al distributions of zeolites and their impact on properties
Li, J., Gao, M., Yan, W., & Yu, J. (2023) · Chemical Science · doi:10.1039/d2sc06010h · Cited by 404
Zeolite Synthesis under Nonconventional Conditions: Reagents, Reactors, and Modi Operandi
Deneyer, A., Ke, Q., Devos, J., & Dusselier, M. (2020) · Chemistry of Materials · doi:10.1021/acs.chemmater.9b04741 · Cited by 82
Metadata
- Authors
- Majano, G., Delmotte, L., Valtchev, V., & Mintova, S.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-08-18
- Volume
- 21
- Issue
- 18
- Pages
- 4184-4191
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W1964497528
- Cited by
- 182
- References
- 2
- FWCI
- 4.00
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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