Seed-directed synthesis of EMT-type zeolite from an organic-template-free system

Mou, Qin; Niu, Li; Xiang, Song

doi:10.1016/j.micromeso.2015.03.023

Cited by 15 publications

(4 citation statements)

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“…Like FAU-type zeolite, the EMT-type zeolite is constituted of sodalite cages linked by double six-rings. The EMT framework structure results from a stacking of faujasite sheets through a mirror plane symmetry while the FAU framework structure is founded through an inversion center symmetry [20,21]. The EMT zeolite possesses two sets of cages, i.e.…”

Section: Introductionmentioning

confidence: 99%

Highly active Pd containing EMT zeolite catalyst for indirect oxidative carbonylation of methanol to dimethyl carbonate

Wang

Qin

et al. 2021

Journal of Energy Chemistry

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Section: Introductionmentioning

confidence: 99%

Highly active Pd containing EMT zeolite catalyst for indirect oxidative carbonylation of methanol to dimethyl carbonate

Wang

Qin

et al. 2021

Journal of Energy Chemistry

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“…The yields are low (∼20–30 %) in part due to the inevitable dissolution of silica species, but a recent report found that the silica‐based zeolite yield could be significantly increased to ∼80 % by using synthesis precursors with higher Al contents since the aluminosilicate species tend to be incorporated into the solids more favorably than the silicate species during crystallization . Over the past decade, the seed‐directed OSDA‐free strategy has been successfully applied to the synthesis of many types of zeolites, including PAU, MFI, MEL, FER, MOR,, SZR, MSE, MAZ, CHA, RTH, VET, MTW, LEV, EMT, MTT, TON, MWW, and ZSM‐34 . The seed‐directed OSDA‐free synthetic strategy represents a key recent progress in advancing sustainable chemistry for the production of zeolites.…”

Section: Organotemplate‐free Synthesis Of Zeolitesmentioning

confidence: 99%

Understanding Commonalities and Interplay Between Organotemplate‐Free Zeolite Synthesis, Hierarchical Structure Creation, and Interzeolite Transformation

2018

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are crystalline microporous materials that have been widely used in many applications related to industrial catalysis, ion-exchange, and adsorption. In recent years, there has been a growing emphasis on the development of green chemistry toward more sustainable zeolite synthesis routes. Considerable efforts have been devoted to identifying alternative approaches in order to reduce the negative impacts of organic templates. This review will focus on the significant progress achieved during the past decade on the development of novel organotemplate-free strategies through three distinctive topics, i. e. zeolite synthesis, hierarchical zeolite synthesis, and interzeolite transformation. The progress of each topic will be documented, followed by a summary of the intriguing commonalities and interplay among these approaches. The insights into the mechanism and interplay leading to different zeolite materials will enable us to understand the requirements for designing novel zeolite catalysts and catalyst supports in an organotemplate-free environment that are likely to further enhance the industrial impact of these materials in the future. We conclude this article with a perspective and outlook focusing on current trends and future directions in this area.[a] Dr.

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“…Recently, a number of great works on organotemplate-free synthesis of zeolites have been achieved. Typically, Okubo and his co-workers synthesized the NES-type zeolite using EU-1 seed crystals under the OSDA-free conditions, [78] Li and his co-workers reported the seed-directed synthesis of EMT zeolite from an organotemplate-free system, [79] Liu and his coworkers showed the organotemplate-free synthesis of ZSM-35 zeolite using MCM-49 zeolite seeds, [80] and Xu and his coworkers demonstrated an organotemplate-free synthesis of ZSM-5/11 intergrowth using the mixed zeolite seeds. [81] It is worth mentioning that the organotemplate-free route is also successful to introduce heteroatoms such as Fe, Ti, and Zn into the zeolite framework, which can lead to activity in catalytic redox reactions.…”

Section: Organotemplate-free Synthesis Of Zeolitesmentioning

confidence: 99%

Understanding Mechanism and Designing Strategies for Sustainable Synthesis of Zeolites: A Personal Story

Wang

Xiao

2016

The Chemical Record

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Zeolites with intricate micropores have been widely studied for a long time as an important class of porous materials in different areas of industrial processes such as gas adsorption and separation, ion exchange, and shape-selective catalysis. However, their industrial syntheses are not sustainable, and normally require the presence of expensive organic templates and a large amount of solvents such as water. The presence of organic templates not only increases zeolite cost but also produces harmful gases during the removal of these templates by calcination, while the use of solvents significantly increases the amount of polluted water. This Personal Account briefly summarizes recent sustainable routes for the synthesis of zeolites in our group according to our understanding of the synthetic mechanism, and mainly focuses on the organotemplate-free synthesis of zeolites in the presence of zeolite seeds, the design of environmentally friendly templates, and solvent-free synthesis of zeolites.

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Seed-directed synthesis of EMT-type zeolite from an organic-template-free system

Cited by 15 publications

References 50 publications

Highly active Pd containing EMT zeolite catalyst for indirect oxidative carbonylation of methanol to dimethyl carbonate

Highly active Pd containing EMT zeolite catalyst for indirect oxidative carbonylation of methanol to dimethyl carbonate

Understanding Commonalities and Interplay Between Organotemplate‐Free Zeolite Synthesis, Hierarchical Structure Creation, and Interzeolite Transformation

Understanding Mechanism and Designing Strategies for Sustainable Synthesis of Zeolites: A Personal Story

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