Zeolite with trimodal porosity by desilication of zeolite nanocrystals aggregate

Wang, Yuxin; Liu, Kaituo; He, Tao; Wu, Jinhu; Fang, Yunming

doi:10.1016/j.jssc.2012.04.028

Cited by 10 publications

(3 citation statements)

References 36 publications

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“…The material nanoZS consists of rectangular‐shaped nanocrystallites, that are somewhat comparable to those reported for nano‐sized ZSM‐5 …”

Section: Resultssupporting

confidence: 77%

“…The material nanoZS consists of rectangular-shaped nanocrystallites, that are somewhat comparable to those reported for nano-sized ZSM-5. [34] Figure 5s hows the nitrogen adsorption-desorption isotherms, at T = À196 8C, for the prepared materials, and the texture parameters are given in Ta ble 1. Zeolite commZSexhibited at ype Ii sotherm, which is characteristico fm icroporous materials.…”

Section: Samplementioning

confidence: 99%

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MFI Acid Catalysts with Different Crystal Sizes and Porosity for the Conversion of Furanic Compounds in Alcohol Media

et al. 2017

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Solid acid catalysts possessing MFI topology and different crystal sizes and porosities were explored for the conversion of carbohydrate‐biomass‐derived α‐angelica lactone and 5‐(hydroxymethyl)furfural, in 1‐butanol at T=120–170 °C, to give levulinate esters and furanic ethers. Micro/mesoporous microcrystalline catalysts were prepared by post‐synthesis base/acid treatments of ZSM‐5 zeolite; the influence of the desilication (base) conditions on the material properties was investigated. A nanocrystalline ZSM‐5 sample was synthesised by using hydrothermal, dynamic conditions and used as a reference material. A comparison of the catalytic performances of materials featuring different morphological, textural, and acid properties highlights a complex interplay between the acid and textural properties. The best‐performing catalyst (MZS0.6) was obtained by post‐synthesis‐treatment; fairly good catalytic stability was confirmed by catalyst recycling, contact tests, and characterisation of the spent catalyst. MZS0.6 was compared with the macrorecticular ion‐exchange resin Amberlyst‐15, chosen as a benchmark solid acid catalyst, in the two reaction systems.

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“…The material nanoZS consists of rectangular‐shaped nanocrystallites, that are somewhat comparable to those reported for nano‐sized ZSM‐5 …”

Section: Resultssupporting

confidence: 77%

Section: Samplementioning

confidence: 99%

MFI Acid Catalysts with Different Crystal Sizes and Porosity for the Conversion of Furanic Compounds in Alcohol Media

et al. 2017

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“…Despite the broad literature on the subject, the articles do not report the effects of desilication on crystals of different sizes [7][8][9][10][11][12][13][14][15][16] . In this context, the main goal of this study was to characterize the ZSM-5 and ZSM-12 zeolites with different crystals sizes and Si/Al ratio ideal for the generation of intracrystalline porosity by silicon removal.…”

Section: Introductionmentioning

confidence: 99%

Desilication of ZSM-5 and ZSM-12 Zeolites with Different Crystal Sizes: Effect on Acidity and Mesoporous Initiation

et al. 2019

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In the present work, the desilication of the H-ZSM-5 and H-ZSM-12 zeolites with Si/AL ratios of 28 and 56 and crystal sizes of around 200 and 600 nm, respectively, was performed. Through electron transmission microscopy analysis, it was possible to verify the influence of aluminium gradients on smaller crystals in addition to the exact moment at which the formation of mesoporous is initiated inside the zeolitic framework. Moreover, the crystal size exerts a significant influence on the total amount of acid sites remaining after alkaline treatment, as verified by means of temperature-programmed desorption of ammonia. This is because the presence of larger crystals during desilication may increase the likelihood of reinsertion of aluminium atoms in the zeolite framework and, consequently, maintain the same total amount of acid sites in the zeolite as before alkaline treatment. Meanwhile, aluminium atoms tend to be removed from smaller crystals, thereby decreasing the total amount of acid sites.

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Synthesis of hybrid materials by immobilizing para-aminobenzoic acid complexes of Eu3+ and Tb3+ in zeolite Y and their luminescent properties

Ambili

Thomas

2020

J Porous Mater

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Zeolite with trimodal porosity by desilication of zeolite nanocrystals aggregate

Cited by 10 publications

References 36 publications

MFI Acid Catalysts with Different Crystal Sizes and Porosity for the Conversion of Furanic Compounds in Alcohol Media

MFI Acid Catalysts with Different Crystal Sizes and Porosity for the Conversion of Furanic Compounds in Alcohol Media

Desilication of ZSM-5 and ZSM-12 Zeolites with Different Crystal Sizes: Effect on Acidity and Mesoporous Initiation

Synthesis of hybrid materials by immobilizing para-aminobenzoic acid complexes of Eu3+ and Tb3+ in zeolite Y and their luminescent properties

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