Mesopore modification of beta zeolites by sequential alkali and acid treatments: Narrowing mesopore size distribution featuring unimodality and mesoporous texture properties estimated upon a mesoporous volumetric model

Ye, Jin; Xiao, Changchun; Wang, Jinhuan; Zhang, Shudong; Asaoka, Sachio; Zhao, Suoqi

doi:10.1016/j.micromeso.2015.07.021

Cited by 15 publications

(2 citation statements)

References 54 publications

(70 reference statements)

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“…Therefore, conventional desilication is not ideal for organotemplate‐free mesopore creation since the process temperature is not sufficiently high to induce recrystallization, which is a key step in regaining crystallinity as well as microporosity. Furthermore, for beta zeolites, the average mesopore sizes created by conventional top‐down leaching are usually limited to the range of 2–6 nm,,, which is much smaller than some pentasil zeolites, such as ZSM‐5 and ZSM‐12, after similar base leaching ,…”

Section: Organotemplate‐free Hierarchical Structure Creationmentioning

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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Section: Organotemplate‐free Hierarchical Structure Creationmentioning

confidence: 99%

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

2018

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“…Recently, zeolite treated with alkaline solution in the presence of templated, has sparked lots of interest, which could affect the mesoporous properties such as the structure of mesopores . And it also may result in the selective extraction of silicon atoms from zeolite framework without substantial decrease of microporosity …”

Section: Introductionmentioning

confidence: 99%

The Influence of TPOACl on the Post‐Synthesis of Hierarchical Zeolite Y and the Catalytic Cracking Application

Zheng

Luo

et al. 2017

ChemistrySelect

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A hierarchical zeolite Y was prepared through a facile SiCl4‐dealumination plus alkaline treatment process with the addition of surfactant TPOACl. It was investigated in detail by XRD, BET, MAS NMR, NH3‐TPD and Py‐IR. Compared with single alkaline treatment, the alkaline treatment in the presence of TPOACl could protect the microporosity of zeolite and led to hierarchical pore structures with increased mesoporosity and narrow distribution of mesopores. Accordingly, the mechanism for the desilication and the formation of mesopores in the presence of TPOACl was proposed based on the measurement results of NMR and Py‐IR. The EFAl species could be assembled to poly‐aluminum species in the presence of TPOACl and leads to low content of Lewis acid sites. The hierarchical zeolite Y with high ratio of B/L and high percent of mesopores possesses excellent catalytic performance in the conversion of 1,3,5‐TIPB.

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Fossil Fuels: The Effect of Zeolite Catalyst Particle Morphology on Catalyst Performance in the Conversion of Methanol to Hydrocarbons

Łukaszuk

Campo

Molino

et al. 2017

Nanotechnology for Energy Sustainability

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Mesopore modification of beta zeolites by sequential alkali and acid treatments: Narrowing mesopore size distribution featuring unimodality and mesoporous texture properties estimated upon a mesoporous volumetric model

Cited by 15 publications

References 54 publications

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

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

The Influence of TPOACl on the Post‐Synthesis of Hierarchical Zeolite Y and the Catalytic Cracking Application

Fossil Fuels: The Effect of Zeolite Catalyst Particle Morphology on Catalyst Performance in the Conversion of Methanol to Hydrocarbons

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