Bridging Dealumination and Desilication for the Synthesis of Hierarchical MFI Zeolites

Yang, Shitu; Yu, Chenxi; Yu, Lili; Miao, Shu; Zou, Mingming; Jin, Changzi; Zhang, Dazhi; Xu, Longya; Huang, Sheng-Jun

doi:10.1002/ange.201706566

Cited by 12 publications

(2 citation statements)

References 35 publications

(67 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such demand calls for the construction of hierarchical/mesoporous zeolites bearing the integrated microporosity and mesoporosity [21–23] . Versatile methodologies, categorized to “bottom‐up” [24–26] and “top‐down” [27–30] routes, have been successfully designed for this target.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Evolution Track for the Metathesis of Alkenes within Hierarchical Zeolite‐Based Catalysts

Wei

Wang

Yang

et al. 2023

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

The usage of hierarchical MFI zeolite enables a boost of the catalytic performance of Mo-based catalysts for the olefin-metathesis reaction. The harvest of active catalysts roots in a segmental evolution track between hierarchical zeolite and Al 2 O 3 slices for the fabrication of active sites. The working evolution track requires the indispensable engagements from intracrystalline mesoporous surface, Al 2 O 3 slices, and zeolitic Brønsted acid sites. The infilling of disaggregated Al 2 O 3 slices into the intracrystalline mesopores triggers the creation of localized intrazeoliteÀ Al 2 O 3 interfaces, which enables the subsequent migration and trapping of surface molybdates into the micropores. The insulation of intrazeoliteÀ Al 2 O 3 interface or shielding of zeolitic Brønsted acid sites leads to the break of the evolution track. Our findings disclose the hidden functionality of mesoporosity as intrazeolite interface boundary for the fabrication of active sites and supply a new strategy for the rational design of zeolite catalysts.

show abstract

Section: Introductionmentioning

confidence: 99%

Insight into the Evolution Track for the Metathesis of Alkenes within Hierarchical Zeolite‐Based Catalysts

Wei

Wang

Yang

et al. 2023

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

show abstract

“…ZSM-5 is a widely used catalyst in alkane catalytic cracking reaction for its excellent acid property, large surface area, and unique microporous structure. The micropores of ZSM-5 with plentiful acid sites exert the shape selectivity and high activity in the catalytic cracking reaction. − To further increase the activity of ZSM-5 zeolites, several methods for the regulation of acidity were developed, including post treatment, − element modification, − etc. Meanwhile, the construction of metal/ZSM-5 bifunctional catalysts with metal subcomponent as dehydrogenation unit, and acidic zeolite playing cracking role, has also been proved effective. , …”

Section: Introductionmentioning

confidence: 99%

Hierarchical ZSM-5 Zeolites with Tunable Sizes of Building Blocks for Efficient Catalytic Cracking of i-Butane

Liu

Chen

et al. 2018

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Hierarchical ZSM-5 zeolites have been receiving increasing attention from both fundamental research and industrial applications. From the chemical engineering viewpoint, the introduction of building block of ZSM-5 could give consideration to both external surface acidities and diffusion properties which are important in parallel sequence reaction for the final product distribution. In this work, hierarchical ZSM-5 with different sizes of building blocks were successfully prepared by tuning the water/silica ratio during the synthesis. With varying the size of building blocks, the diffusion property and external surface acidity were finely regulated, and it significantly influences the performances of ZSM-5 during catalytic cracking reaction. The catalyst with proper size of building blocks exhibited the optimized yield of olefins and lowest carbon deposition during 72 h reaction in catalytic cracking of i-butane. The strategy proposed herein could be helpful for the engineering design of hierarchical zeolites for industrially important catalytic reactions.

show abstract

Hierarchical Zeolites‐confined Metal Catalysts and Their Enhanced Catalytic Performances

Sun

2021

Chemistry An Asian Journal

View full text Add to dashboard Cite

The confinement of metal species within hierarchical zeolites combines the acidic/basic sites of zeolites, the enhanced mass transfer of mesoporous system, and the inside active metal sites, leading to high activity, unique selectivity, and superior stability in chemicals synthesis, energy and environment catalysis. To date, review on this emerging topic is rarely reported. Herein, we classify five metals-hierarchical zeolites composite (metal@hierarchical zeolites) according to the location of metals on hierarchical structure, including metals located on micropores, intercrys-talline mesopores, intracrystalline mesopores, hollow nanobox and mesoporous shells. The synthesis and catalysis applications of metal@hierarchical zeolites composite are provided, highlighting the rational design of catalyst preparation, the improved catalytic efficiency and stability of metal species. Finally, we discuss the current limitations and future opportunities for this emerging field. This Review is expected to inspire more developments and applications of metal@hierarchical zeolites.

show abstract

Bridging Dealumination and Desilication for the Synthesis of Hierarchical MFI Zeolites

Cited by 12 publications

References 35 publications

Insight into the Evolution Track for the Metathesis of Alkenes within Hierarchical Zeolite‐Based Catalysts

Insight into the Evolution Track for the Metathesis of Alkenes within Hierarchical Zeolite‐Based Catalysts

Hierarchical ZSM-5 Zeolites with Tunable Sizes of Building Blocks for Efficient Catalytic Cracking of i-Butane

Hierarchical Zeolites‐confined Metal Catalysts and Their Enhanced Catalytic Performances

Contact Info

Product

Resources

About