Sol-gel synthesis of mesoporous aluminosilicates with a narrow pore size distribution and catalytic activity thereof in the oligomerization of dec-1-ene

Аглиуллин, М. Р.; Данилова, И. Г.; Файзуллин, А. В.; Amarantov, Srgey V.; Бубеннов, С. В.; Prosochkina, T. R.; Григорьева, Н. Г.; Paukshtis, E. A.; Кутепов, Б. И.

doi:10.1016/j.micromeso.2016.05.007

Cited by 34 publications

(14 citation statements)

References 42 publications

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“…3,4 Due to steric restrictions, the conventional micro-porous molecular sieves failed to achieve an optimum effect in catalytic transformations where the molecular size of either starting materials or products exceeded 10Å. The creation of materials possessing the micro-meso-macroporous structure that would provide the efficient diffusion of reagents to the active sites and the reverse diffusion of the reaction products formed [5][6][7][8] could become a solution to the above problem.…”

Section: Introductionmentioning

confidence: 99%

Template-free synthesis of high degree crystallinity zeolite Y with micro–meso–macroporous structure

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Template-free synthesis of high degree crystallinity zeolite Y with micro–meso–macroporous structure

et al. 2017

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“…Mesoporous aluminosilicates with Si/Al = 40, 80, 120 atomic ratio have been prepared by sol-gel synthesis at variable pH [30]. In a typical synthesis in the first step (synthesis in an acidic medium), 14 g of tetraethylorthosilicate and 0.16-0.64 g (0.16 g for Si/Al = 120, 0.32 g for Si/Al = 80, 0.64 g for Si/Al = 40) of aluminum nitrate were added to 12 ml of water and 28 ml of ethanol.…”

Section: Sol-gel Synthesis Of Mesoporous Aluminosilicatesmentioning

confidence: 99%

“…We have prepared earlier mesoporous aluminosilicates with a high proportion of aluminum atoms embedded in a silicate matrix and a narrow pore size distribution applying sol-gel synthesis [30], which proved to be high efficiency catalysts for oligomerization of α-olefins. This research focuses on a more detailed study of the mechanism of formation of mesopores with a narrow size distribution, study of the influence of the Si/Al ratio in mesoporous aluminosilicates, prepared by two-step sol-gel synthesis, on their porous structure, the size of secondary gel particles, the localization of aluminum atoms and the acidity of the surface.…”

Section: Introductionmentioning

confidence: 99%

Two-step sol–gel synthesis of mesoporous aluminosilicates: highly efficient catalysts for the preparation of 3,5-dialkylpyridines

et al. 2018

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The microstructure, acid properties and characteristics of the porous structure of sol-gel-synthesized mesoporous aluminosilicates with Si/Al ratios of 40, 80, and 120 have been investigated. It was illustrated that the main reason for the formation of a narrow mesopore size distribution in the investigated aluminosilicates is related to the close size of the secondary particles of the prepared xerogels. The research revealed that an increase in the Si/A1 ratio leads to a slight decrease in the specific surface and mesopore volume. An increase in the Si/Al ratio from 40 to 120 has proved to reduce the total acidity in ammonia from 554 to 324 μmol/g. It is shown that mesoporous aluminosilicates prepared by two-step sol-gel synthesis show high activity and selectivity in the synthesis of 3,5-dialkylpyridines.

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“…Detailed information about the influence of the method of synthesis on textural characteristics of samples, the state of atoms of aluminium in their structure and their acidic properties is set out elsewhere. 38,39 Note that the samples of synthesised mesoporous aluminosilicates ASM-1 and ASM-2 have different textural and acid characteristics. ASM-1 is characterised by a wide pore size distribution within the range 2-40 nm, large pore volume and smaller specific surface area.…”

Section: Mesoporous Aluminosilicates Asm-1 and Asm-2mentioning

confidence: 99%

Crystalline and amorphous aluminosilicates with different pore structures for the synthesis of pyridines

Григорьева

Filippova

Аглиуллин

et al. 2017

Journal of Chemical Research

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The heterogeneous catalytic synthesis of pyridine and methylpyridines (picolines) was carried out by the reaction of ethanol with formaldehyde and ammonia over aluminosilicates with different acidic properties and textural characteristics: zeolite framework-type FAU in H-form with microporous (H-Y) and micro-meso-macroporous structure (H-Y-mmm) and mesoporous aluminosilicates, obtained by sol-gel synthesis in an alkaline medium (ASM-1) and under variable pH (ASM-2). It is shown that the highest catalytic activity is characteristic of ASM-2 (Si/Al = 40) with a narrow pore size distribution within the range 2 to 5 nm and containing strongly acidic bridging Si–OH–Al groups on the surface. The products of the reaction of ethanol with formaldehyde and ammonia on the catalysts studied are dominated by picolines; the maximum amount of picolines (60%) is formed on the H-Y-mmm and aluminosilicate ASM-2 samples.

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Sol-gel synthesis of mesoporous aluminosilicates with a narrow pore size distribution and catalytic activity thereof in the oligomerization of dec-1-ene

Cited by 34 publications

References 42 publications

Template-free synthesis of high degree crystallinity zeolite Y with micro–meso–macroporous structure

Template-free synthesis of high degree crystallinity zeolite Y with micro–meso–macroporous structure

Two-step sol–gel synthesis of mesoporous aluminosilicates: highly efficient catalysts for the preparation of 3,5-dialkylpyridines

Crystalline and amorphous aluminosilicates with different pore structures for the synthesis of pyridines

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