Direct synthesis of hierarchical ferrierite nanosheet assemblies via an organosilane template approach and determination of their catalytic activity

Wuamprakhon, Phatsawit; Wattanakit, Chularat; Warakulwit, Chompunuch; Yutthalekha, Thittaya; Wannapakdee, Wannaruedee; Ittisanronnachai, Somlak; Limtrakul, Jumras

doi:10.1016/j.micromeso.2015.07.022

Cited by 49 publications

(35 citation statements)

References 65 publications

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“…[8][9][10][11][12] However, reports on the synthesis of nano-sized ferrierite are very limited. Both Xue 13 and Wuamprakhon 14 successfully synthesized hierarchical ferrierite with a ball-shaped morphology comprising nanosheets. This hierarchical ferrierite showed greatly improved catalytic activities for the pyrolysis of low-density polyethylene and benzylation of toluene with benzyl chloride.…”

Section: 7mentioning

confidence: 99%

Designing ferrierite-based catalysts with improved properties for skeletal isomerization of n-butene to isobutene

et al. 2017

RSC Adv.

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The crystal morphology and size of ferrierite catalysts were controlled by a suite of crystallization methods and structure-directing agents. In particular, nano-sized ferrierite could be obtained by using tetramethylammonium hydroxide and pyrrolidine as double structure-directing agents under dynamic crystallization. The catalysts were analysed by XRD, SEM, N 2 adsorption-desorption, NMR, XRF, NH 3 -TPD, Py-IR, and TGA, and the characteristics were correlated with their catalytic performance in the skeletal isomerization of n-butene. The results clearly indicated that all the catalysts have a similar crystallinity, Si/Al ratio, and total number of acid sites, while a decrease in their crystal size leads to more pore mouth acid sites. The nano-sized ferrierite showed better stability and higher activity, which were related to their crystal morphology, size, and pore mouth acid. In addition, we further confirmed that high isobutene selectivity can be produced by monomolecular reaction.

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Section: 7mentioning

confidence: 99%

Designing ferrierite-based catalysts with improved properties for skeletal isomerization of n-butene to isobutene

et al. 2017

RSC Adv.

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“…The XRD patterns of the synthesized samples with different crystal sizes were shown in Figure S1. The samples exhibited FER topology corresponding to the published patterns . The XRD patterns indicated that the as‐synthesized samples H−L‐FER and H−S‐FER were highly crystalline FER type zeolites without any impure phases.…”

Section: Resultsmentioning

confidence: 68%

Catalytic Performance of Ferrierite with Different Crystal Grain Sizes during Skeletal Isomerization of 1‐Butene

Zhang

et al. 2017

ChemistrySelect

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Ferrierite (FER) zeolite with small crystal grain size was successfully prepared by a kind of hydrothermal synthesis with aging procedure using ethylenediamine (EDA) as template. The zeolite was characterized by a series of analyses. Aging procedure decreased the crystal grain sizes and no significant change was found in the ratio of Si/Al and acid sites. Eventually, FER zeolite with small crystal grain size ranging from 150nm to 800nm showed high isobutene selectivity and good stability during skeletal isomerization of 1‐butene. The reaction was divided into two stages because of the change in the conversion of 1‐butene. Coke deposited at reaction stage II primarily caused the deactivation of FER zeolite. FER Zeolite with small crystal grain led to not only a lower rate of coke deposition but also more coke content than FER zeolite with normal crystal grain size.

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“…Moreover, the synthesis of other zeolite nanosheets or nanolayers such as faujasite (FAU), ferrierite (FER) and Zeolite Socony Mobil -twelve (MTW) zeolite frameworks has been demonstrated [32][33][34][35][36][37]. TPOAC is one of the most promising mesoporogens, which is widely used in zeolite synthesis.…”

Section: Synthesis Of Hierarchical Zeolite Nanosheetsmentioning

confidence: 99%

“…Interestingly, the corn cob ash can also be used as the silica source instead of a commercial sodium silicate to synthesize FAU zeolite nanosheets [35]. In addition, hierarchical FER nanosheets can be obtained by optimizing the suitable amount of TPOAC as the SDA, and they exhibit a higher hierarchy factor (HF value of 0.11) compared with that of conventional FER (HF value of 0.03) [36]. Furthermore, in the synthesis of hierarchical MTW, the ZSM-12 nanolayers were prepared using TPOAC as the secondary SDA.…”

Section: Synthesis Of Hierarchical Zeolite Nanosheetsmentioning

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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Direct synthesis of hierarchical ferrierite nanosheet assemblies via an organosilane template approach and determination of their catalytic activity

Cited by 49 publications

References 65 publications

Designing ferrierite-based catalysts with improved properties for skeletal isomerization of n-butene to isobutene

Designing ferrierite-based catalysts with improved properties for skeletal isomerization of n-butene to isobutene

Catalytic Performance of Ferrierite with Different Crystal Grain Sizes during Skeletal Isomerization of 1‐Butene

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

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