From 3D to 2D zeolite catalytic materials

Přech, Jan; Pizarro, Patricia; Serrano, David; Čejka, Jiřı́

doi:10.1039/c8cs00370j

Cited by 265 publications

(134 citation statements)

References 448 publications

(601 reference statements)

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“…There are many reports about enhanced performance that can be achieved in catalysis when using 2D zeolite materials, especially for delaminated and pillared zeolite materials [36][37][38][39][40][41][42]. Overviews of 2D zeolites in catalysis have been published by J.Čejka [6,9,43] and J. Sun [10] in the past few years.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Zeolite Materials: Structural and Acidity Properties

Schulman

Liu

2020

Materials

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Zeolites are generally defined as three-dimensional (3D) crystalline microporous aluminosilicates in which silicon (Si4+) and aluminum (Al3+) are coordinated tetrahedrally with oxygen to form large negative lattices and consequent Brønsted acidity. Two-dimensional (2D) zeolite nanosheets with single-unit-cell or near single-unit-cell thickness (~2–3 nm) represent an emerging type of zeolite material. The extremely thin slices of crystals in 2D zeolites produce high external surface areas (up to 50% of total surface area compared to ~2% in micron-sized 3D zeolite) and expose most of their active sites on external surfaces, enabling beneficial effects for the adsorption and reaction performance for processing bulky molecules. This review summarizes the structural properties of 2D layered precursors and 2D zeolite derivatives, as well as the acidity properties of 2D zeolite derivative structures, especially in connection to their 3D conventional zeolite analogues’ structural and compositional properties. The timeline of the synthesis and recognition of 2D zeolites, as well as the structure and composition properties of each 2D zeolite, are discussed initially. The qualitative and quantitative measurements on the acid site type, strength, and accessibility of 2D zeolites are then presented. Future research and development directions to advance understanding of 2D zeolite materials are also discussed.

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Section: Introductionmentioning

confidence: 99%

Two-Dimensional Zeolite Materials: Structural and Acidity Properties

Schulman

Liu

2020

Materials

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“…Microporous silica was the most common type at first, but advances in the development of organized mesoporous silica (especially mesoporous molecular sieves MCM-41, MCM-48, and SBA-15) led to the increased number of applications of these materials as advanced supports. Recently, new types of zeolites (mesoporous, two-dimensional [29][30][31]) have been shown to be interesting supports for new metathesis heterogeneous catalysts (vide infra). Several review articles and book chapters have been devoted to this topic [16,17,[32][33][34][35][36] and therefore we have exclusively focused on catalysts with a SBA-15 support and on their state-of-the-art features.…”

Section: Well-defined Heterogeneous Olefin Metathesis Catalysts Prepamentioning

confidence: 99%

SBA-15 as a Support for Effective Olefin Metathesis Catalysts

Balcar

Čejka

2019

Catalysts

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Olefin metathesis is the catalytic transformation of olefinic substrates, finding a wide range of applications in organic synthesis. The mesoporous molecular sieve Santa Barbara Amorphous (SBA-15) has proven to be an excellent support for metathesis catalysts thanks to its regular mesoporous structure, high BET area, and large pore volume. A survey of catalysts consisting of (i) molybdenum and tungsten oxides on SBA-15, and (ii) molybdenum and ruthenium organometallic complexes (Schrock and Grubbs-type carbenes) on SBA-15 is provided together with their characterization and catalytic performance in various metathesis reactions. The comparison with catalysts based on other supports demonstrates the high quality of the mesoporous molecular sieve SBA-15 as an advanced catalyst support.

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“…In addition, fluid catalytic cracking process (FCC) process requires braking C-C bonds to more important chemical fractions, and it requires materials like Y zeolite with a strong Brønsted acidity property [127]. On other hand, a future prospective and policy for utilizing local zeolite resources can be achieved by a good combination between Si/Al of the various forms of local zeolites to produce 2D and to minimize the formation of coke [128].…”

Section: Conditionsmentioning

confidence: 99%

“…In addition, the identification of the active acidic centers by temperature-programmed desorption of ammonia is required. (iv) Based on previous studies [87,100,101,103,122,128], local investigation of natural clinoptilolite by acid or base treatment is required in order to gain a complete understanding of its properties and in discovering ways to exploit them and use the local zeolite in a variety of industrial applications such as in coke reduction. Performance of kinetics and thermodynamics investigations will be necessary to examine the diffusion limitation for the new formed nano local zeolite.…”

Section: Proposed Future Plans For Local Natural Clinoptilolitementioning

confidence: 99%

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Alsawalha

2019

Journal of Chemistry

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After a thorough review of existing studies of clinoptilolite zeolites, three areas for potential investigation of the Saudi Arabian zeolites were found. They are the characterizations, the catalytic activity, active sites, and uses of natural clinoptilolite zeolites. First, no analysis is available worldwide to compare the percentage weight of local zeolites with those sourced from other countries, nor does one exist for the establishment on the zeolite conversion of MBOH with water on acidic catalysts at lower temperatures. Secondly, a review of current literature on the topic revealed that basic and active sites of Saudi Arabian zeolites have yet to be examined. Future investigation of zeolite catalytic activity can be achieved by methyl butynol test reaction (MBOH) and absorption-desorption of ammonia. In the characterization of a range of international materials, the methyl butynol test reaction was utilized, including on natural zeolites, natural clays, and synthesized hydrotalcites. However, the catalytic performance of natural Saudi Arabian clinoptilolite zeolites by test reaction of MBOH conversion has not been yet investigated. Therefore, this article also includes an outline of the general testing conditions and parameters required to execute the accurate characterization of local Saudi clinoptilolite under optimal test conditions. Likewise, knowledge of the important active acidic centers of local materials is prescribed. This can be ascertained by determining the conditions together with the test parameters for the application of the “temperature-programmed desorption of ammonia” method in order to obtain an accurate determination of local Saudi clinoptilolite acidic centers. Additionally, an outline of the catalytic activity of worldwide clinoptilolite is given in this article together with kinetic investigations of other sources for the clinoptilolite zeolite in order to form the basis for the testing of local Saudi clinoptilolite. The percentage average of chemical composition (Wt.%) of natural clinoptilolite from various countries is also included. Finally, a future research plan is proposed here. This will form the basis for a complete study or survey to be compiled detailing the modifications needed to increase the surface areas for Saudi natural clinoptilolite zeolites using different methods of modifications. This could enhance its application as acid catalysts for use in the retardation of coke formation and for membrane separation on cationic exchange.

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From 3D to 2D zeolite catalytic materials

Cited by 265 publications

References 448 publications

Two-Dimensional Zeolite Materials: Structural and Acidity Properties

Two-Dimensional Zeolite Materials: Structural and Acidity Properties

SBA-15 as a Support for Effective Olefin Metathesis Catalysts

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

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