Synthesis methods and recent advances in hierarchical zeolites: a brief review

Mumtaz, Faisal; Irfan, Muhammad; Usman, Muhammad R.

doi:10.1007/s13738-021-02183-2

Cited by 19 publications

(4 citation statements)

References 90 publications

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“…因此, 为了提高分子筛催化剂的催化活性和稳定性, 研究者们将研究重点聚焦于向分子筛中引入介孔(2~50 nm)或大孔(大于50 nm)以制备多级孔分子筛 [8] . 常见的多级孔沸石分子筛的制备方法主要分为后处理法和模板法 [9,10] . 后处理法是将沸石分子筛中的部分硅原子或者铝原子脱除, 从而造成结构缺陷, 形成介孔孔道.…”

Section: 引言unclassified

软模板法制备多级孔沸石分子筛的研究进展

Qi,

Wang,

Zhang

et al. 2024

Sci. Sin.-Chim

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Zeolite is one of the widely used solid catalysts in the chemical industry, but its microporous structure also brings some limitations to the practical applications. The hierarchical zeolites have exhibited excellent catalytic performance in different catalytic reactions, especially for those containing large molecules, which is because they combine the excellent catalytic performance of micropores and the excellent mass transfer ability of mesoporous or microporous systems. Therefore, the preparation of hierarchical zeolites has become a current research hot issue. Compared to other preparation methods, the soft template method can better control the mesoporous structure and pore size of the prepared hierarchical zeolites. In this review, the effects of different soft templates on the structure and catalytic performance of hierarchical zeolites are systematically described based on zeolite type. The challenges of preparation of hierarchical zeolites via soft template method at present are put forward, and their development directions are proposed.

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Section: 引言unclassified

软模板法制备多级孔沸石分子筛的研究进展

Qi,

Wang,

Zhang

et al. 2024

Sci. Sin.-Chim

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“…The risk of mesopore network collapse and formation of single zeolite crystals. [32,[48][49][50] Thin zeolitic shell surrounding a hollow core.…”

Section: Short Description Treatment/synthesis Conditions Remarks Ref...mentioning

confidence: 99%

Application of Mesoporous/Hierarchical Zeolites as Catalysts for the Conversion of Nitrogen Pollutants: A Review

Rutkowska,

Chmielarz

2024

Catalysts

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Mesoporous/hierarchical zeolites (HZs) are a relatively new group of materials, and interest in their application in catalysis is continuously growing. This paper presents recent achievements in the application of mesoporous zeolites in catalytic reactions of nitrogen pollutant conversion. The analysis presented includes processes such as selective catalytic reduction of NOx with ammonia (NH3-SCR, DeNOx), selective catalytic oxidation of ammonia (NH3-SCO, AMOx), and catalytic decomposition of N2O. Different zeolite topologies and methods of their modification focused on mesoporosity generation (e.g., desilication, dealumination, steaming, self-assembly techniques, and application of hard and soft templates) are reviewed and compared with respect to catalytic processes. Special attention is paid to the role of porous structure and acidity, as well as the form of deposited transition metals, in the catalytic activation of modified zeolites in the elimination of nitrogen pollutants from flue gases.

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“…One method is the fabrication of hierarchical materials which combine micro-and mesoporosity. [154][155][156] Several synthetic approaches have been suggested, with the following two being the most attractive: (i) the formation of zeolite seeds and subsequent self-assembly into a mesoporous framework and (ii) the production of mesopores in zeolites by primary or post-fabrication methods. Approaches to self-assembly have also shown the ability to create unique structures.…”

Section: Exploration Of Tunable Nature and Synthesis Mechanisms Of Ze...mentioning

confidence: 99%

“…Various synthesis techniques have been developed to circumvent the drawbacks of narrow channel openings of zeolites while preserving their chemical properties. One method is the fabrication of hierarchical materials which combine micro‐ and mesoporosity 154‐156 . Several synthetic approaches have been suggested, with the following two being the most attractive: (i) the formation of zeolite seeds and subsequent self‐assembly into a mesoporous framework and (ii) the production of mesopores in zeolites by primary or post‐fabrication methods.…”

Section: Developments and Viewpoints In Low‐alcohol Catalysismentioning

confidence: 99%

Bioethanol as a potential eco‐friendlier feedstock for catalytic production of fuels and petrochemicals

Anekwe

Isa

Oboirien

2023

J of Chemical Tech & Biotech

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Bioethanol, synthesized through the valorization of biomass resources, is of great importance to many industries. As bioethanol has become more abundant and its price has decreased, it has become an attractive candidate for application as a base material for the synthesis of a variety of petrochemicals and fuel through catalysis. In this article, a comprehensive review of the catalytic conversion of bioethanol into hydrocarbons, including olefins and gasoline, is presented. In addition, developments and potential research opportunities in the field of bioethanol catalysis are provided to enhance bioethanol conversion. According to the findings of the study, despite significant progress in bioethanol conversion, further research is needed to address several challenges that will enable improved biofuel and chemical production.

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Synthesis methods and recent advances in hierarchical zeolites: a brief review

Cited by 19 publications

References 90 publications

软模板法制备多级孔沸石分子筛的研究进展

软模板法制备多级孔沸石分子筛的研究进展

Application of Mesoporous/Hierarchical Zeolites as Catalysts for the Conversion of Nitrogen Pollutants: A Review

Bioethanol as a potential eco‐friendlier feedstock for catalytic production of fuels and petrochemicals

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