A dual-templating synthesis strategy to hierarchical ZSM-5 zeolites as efficient catalysts for the methanol-to-hydrocarbons reaction

Meng, Lingqian; Zhu, Xiaochun; Wannapakdee, Wannaruedee; Pestman, Robert; Goesten, Maarten G.; Gao, Lu; Hoof, Arno J. F. van; Hensen, Emiel J. M.

doi:10.1016/j.jcat.2018.02.032

Cited by 68 publications

(33 citation statements)

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“…28 However, the presence of sole micropores imposes the intracrystalline diffusion limitation in the zeolite framework, eventually leading to low utilization of active sites. Recently, there have been several reports on the development of hierarchical zeolites possessing at least two levels of porous structures, such as a microporous feature together with meso-or/and microporous networks, 29,30 which have been used to improve the accessibility and molecular transportation of guest molecules into the zeolite framework. 31 Although the hierarchical zeolite might be one of the most promising candidates as a solid support for nanometal oxides due to an increase in surface area, resulting in improving the dispersion of metal, the development of combined catalysts between the nanoceria-modied platinum and the hierarchical zeolite as a solid support has not yet been demonstrated even though there would be many advantages, in particular the benecial effect of hierarchical structures on the improvement of redox active species.…”

Section: Introductionmentioning

confidence: 99%

Nanoceria-modified platinum supported on hierarchical zeolites for selective alcohol oxidation

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Nanoceria-modified platinum supported on hierarchical zeolites for selective alcohol oxidation

et al. 2019

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“…This catalyst resulted in similar catalytic performances when it was compared to a catalyst that was synthesized with an expensive diquaternary ammonium surfactant. [95] Most surfactant soft-templating techniques result in disruptive mesopore formation along the b-axis. In this aspect, the group of Zhang et al was able to produce a single-crystalline mesoporous MFI zeolite with sheet-like mesopores along the a-and b-axis.…”

Section: Zsm-5mentioning

confidence: 99%

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

et al. 2020

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Zeolites are highly crystalline aluminosilicates with welldefined pores that are constructed of SiO 2 and AlO 4 tetrahedra. These tetrahedra can be linked together in different unique ways to form various materials with a specific topology. [1] According to the International Zeolite Association (IZA), more than 250 different topologies, which are all assigned with a three-letter code, have been identified. [2] The micropores in zeolites are typically constructed from 8, 10, or 12 tetrahedral atoms

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“…Furthermore, the hierarchical ZSM-5 zeolite can be synthesized using non-charged SDA including diethylamine, n-propylamine, 1,4-diaminobutane and 1,6-diaminohexane. The new hierarchical zeolite exhibits high mesoporosity and crystallinity with a low amount of silanol and external Brønsted acid density [40]. TPAOH was also used, together with silica-carbon (SiO 2 /C) composites, to synthesize hierarchical zeolites.…”

Section: Synthesis Of Hierarchical Assembly Of Zeolite Nanoparticlesmentioning

confidence: 99%

A Comprehensive Review of the Applications of Hierarchical Zeolite Nanosheets and Nanoparticle Assemblies in Light Olefin Production

Dugkhuntod

Wattanakit

2020

Catalysts

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Light olefins including ethylene, propylene and butylene are important building blocks in petrochemical industries to produce various chemicals such as polyethylene, polypropylene, ethylene oxide and cumene. Traditionally, light olefins are produced via a steam cracking process operated at an extremely high temperature. The catalytic conversion, in which zeolites have been widely used, is an alternative pathway using a lower temperature. However, conventional zeolites, composed of a pure microporous structure, restrict the diffusion of large molecules into the framework, resulting in coke formation and further side reactions. To overcome these problems, hierarchical zeolites composed of additional mesoporous and/or macroporous structures have been widely researched over the past decade. In this review, the recent development of hierarchical zeolite nanosheets and nanoparticle assemblies together with opening up their applications in various light olefin productions such as catalytic cracking, ethanol dehydration to ethylene, methanol to olefins (MTO) and other reactions will be presented.Catalysts 2020, 10, 245 2 of 15 windows, they can be divided into three different categories including large porous, medium porous and small porous zeolites, which are composed of a different number of tetrahedral units, or T atoms of 12, 10 and 8 membered rings, respectively. These behaviors make each zeolite serving unique shape selective properties, which are very important for the appropriate applications.Although there are several above-mentioned promising properties of zeolites, they are typically composed of a very small microporous structure, eventually resulting in some disadvantages of the diffusion limitation of guest molecules inside the framework. Some bulky molecules cannot easily penetrate into active sites located at microporous channels, and therefore a poor catalytic performance due to a very low reaction rate and a fast deactivation of catalysts is observed. To overcome these limitations and to improve the accessibility of molecules into active sites, in recent years modified zeolites obtained by introducing additional larger porous structures have been extensively developed [5][6][7][8].It is well known that hierarchical zeolites, composed of at least two levels of porous structures such as microspores and mesopores, microspores and macropores, and micropores/mesopores and macropores have been extensively studied and developed. Their microporous (<2 nm), mesoporous (2-50 nm) and/or macroporous (>50 nm) structures are well connected to each other. In this case, the additional larger porous structures can improve diffusion limitation, molecular transportation and coke deposition [9]. In the past decade, there have been several studies regarding the synthesis of hierarchical zeolites to overcome these problems. Herein, this comprehensive review opens up perspectives of the recent synthesis approaches of hierarchical zeolite nanosheets and nanoparticle assemblies, as well as the successful production of light olef...

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A dual-templating synthesis strategy to hierarchical ZSM-5 zeolites as efficient catalysts for the methanol-to-hydrocarbons reaction

Cited by 68 publications

References 46 publications

Nanoceria-modified platinum supported on hierarchical zeolites for selective alcohol oxidation

Nanoceria-modified platinum supported on hierarchical zeolites for selective alcohol oxidation

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

A Comprehensive Review of the Applications of Hierarchical Zeolite Nanosheets and Nanoparticle Assemblies in Light Olefin Production

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