Crystallization of zeolites using microwave radiation

Chu, P.; Dwyer, Francis G.; Vartuli, J.C.

doi:10.1016/s0144-2449(05)80238-6

Cited by 30 publications

(37 citation statements)

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“…[47] The patent claims the ability, "to provide relatively small crystals at higher rates of productivity…" The microwave Ta,NbS-1 (MFI) 30 min-2 h > 90 % yield, highly crystalline [46] 300 www.chemphyschem.org syntheses of over a dozen zeolites have been disclosed and studied in a score of laboratories over the last decade.…”

Section: Siliceous Zeolites-clear Solutionsmentioning

confidence: 99%

Microwave Synthesis of Nanoporous Materials

2006

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Studies in the last decade suggest that microwave energy may have a unique ability to influence chemical processes. These include chemical and materials syntheses as well as separations. Specifically, recent studies have documented a significantly reduced time for fabricating zeolites, mixed oxide and mesoporous molecular sieves by employing microwave energy. In many cases, microwave syntheses have proven to synthesize new nanoporous structures. By reducing the times by over an order of magnitude, continuous production would be possible to replace batch synthesis. This lowering of the cost would make more nanoporous materials readily available for many chemical, environmental, and biological applications. Further, microwave syntheses have often proven to create more uniform (defect-free) products than from conventional hydrothermal synthesis. However, the mechanism and engineering for the enhanced rates of syntheses are unknown. We review the many studies that have demonstrated the enhanced syntheses of nanoporous oxides and analyze the proposals to explain differences in microwave reactions. Finally, the microwave reactor engineering is discussed, as it explains the discrepancies between many microwave studies.

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Section: Siliceous Zeolites-clear Solutionsmentioning

confidence: 99%

Microwave Synthesis of Nanoporous Materials

2006

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“…In the late 1980Õs, Chu et al [17,18] first reported the synthesis of A and ZSM-5 zeolite by microwave heating. Since then more studies have been reported using microwave heating [17,18,[26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…Since then more studies have been reported using microwave heating [17,18,[26][27][28][29][30][31][32][33][34][35]. Different types of zeolites and molecular sieves such as, A [17,18,27], MFI [17,18,28,32], Beta [31], X/Y [27,28], AlPOs [29,30], SAPOs [34] and MCM-41 [35], have been synthesized by this novel microwave-assisted hydrothermal synthesis (MAHS) method. Compared with the conventional hydrothermal synthesis (CHS), MAHS of zeolites has the advantages of a short synthesis time, broad synthesis composition, small zeolite particle size, narrow particle size distribution and high purity [15,27].…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted hydrothermal synthesis of hydroxy-sodalite zeolite membrane

Bao

Song

et al. 2004

Microporous and Mesoporous Materials

121

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“…In the last ten years, microwave heating has been widely used in many chemical reactions, such as organic and inorganic synthesis, oxidationreductions, and polymerizations, so in the fields of zeolite synthesis. The first report of the microwave synthesis of zeolites was given in an US patent by Mobil Oil Corp. in 1988 for the synthesis of zeolites LTA (NaA) and MFI (ZSM-5) (Chu et al, 1998). The crystallization was found to be significantly accelerated by the exposure of synthesis gels to microwave radiation.…”

Section: Zeolite and Zeolite-like Porous Molecular Sievesmentioning

confidence: 99%