Intergrowth of Zeolites LTA and FAU/EMT in Nanosized Particles Synthesized from Organic-Free Gels

Khaleel, Maryam; Juve, Jan-Max Arana; Khalil, Safiya; Elmhamdi, Abdelhakim

doi:10.1021/acs.cgd.2c01008

Cited by 5 publications

(2 citation statements)

References 43 publications

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“…It is well-known that zeolites are often accompanied by competing growth of two-phase zeolites under specific crystallization conditions, resulting in intergrowth zeolites. It is a common strategy to tailor the intergrowth phase ratio by adjusting the gel components through extensive synthetic experience, such as changing the addition and ratio of organic templating agents, , using inorganic templating agents such as Cs + , and adjusting Si/Al, additives or crystal species to assist, etc. However, it is inevitable that the fitting of complex gel components is often tedious and results in high uncertainty. Synthesis process optimization.…”

Section: Synthesis Of Intergrowth Zeolitesmentioning

confidence: 99%

Intergrowth Zeolites, Synthesis, Characterization, and Catalysis

Wang,

Tong,

Liu

et al. 2023

Chem. Rev.

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Microporous zeolites that can act as heterogeneous catalysts have continued to attract a great deal of academic and industrial interest, but current progress in their synthesis and application is restricted to single-phase zeolites, severely underestimating the potential of intergrowth frameworks. Compared with single-phase zeolites, intergrowth zeolites possess unique properties, such as different diffusion pathways and molecular confinement, or special crystalline pore environments for binding metal active sites. This review first focuses on the structural features and synthetic details of all the intergrowth zeolites, especially providing some insightful discussion of several potential frameworks. Subsequently, characterization methods for intergrowth zeolites are introduced, and highlighting fundamental features of these crystals. Then, the applications of intergrowth zeolites in several of the most active areas of catalysis are presented, including selective catalytic reduction of NOx by ammonia (NH 3 -SCR), methanol to olefins (MTO), petrochemicals and refining, fine chemicals production, and biomass conversion on Beta, and the relationship between structure and catalytic activity was profiled from the perspective of intergrowth grain boundary structure. Finally, the synthesis, characterization, and catalysis of intergrowth zeolites are summarized in a comprehensive discussion, and a brief outlook on the current challenges and future directions of intergrowth zeolites is indicated.

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Section: Synthesis Of Intergrowth Zeolitesmentioning

confidence: 99%

Intergrowth Zeolites, Synthesis, Characterization, and Catalysis

Wang,

Tong,

Liu

et al. 2023

Chem. Rev.

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show abstract

“…Mass transport limitations in zeolites have motivated efforts to design materials with nanosized or hierarchical (e.g., mesoporous, pillared, etc.) architectures. − Soft templating techniques have been used as bottom-up approaches, whereas postsynthesis modification offers a top-down approach to enhance diffusion properties of zeolitic materials. Methods that combine heteroatom (e.g., Ti) incorporation in the design of hierarchical materials is also discussed in this virtual special issue. , …”

Section: Nanosized and Hierarchical Zeolitesmentioning

confidence: 99%