Comparison of disordered mesoporous aluminosilicates with highly ordered Al-MCM-41 on stability, acidity and catalytic activity

Zhao, Dongyuan; Nie, Cong; Zhou, Yaming; Xia, Shijing; Huang, Limin; Li, Quanzhi

doi:10.1016/s0920-5861(01)00318-2

Cited by 57 publications

(33 citation statements)

References 32 publications

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“…This result is repeatable. This may cause from further desorption of the hydroxyl groups from the mesoporous materials [7]. …”

Section: Transmission Electron Microscopy and Scanning Electron Micromentioning

confidence: 99%

“…The catalytic activity of the material was investigated for Friedel-Crafts alkylation of benzene, toluene, and m-xylene by using benzyl alcohol as the alkylation agent [6]. Zhao et al [5] synthesized disordered mesoporous aluminosilicates (DMASs), which are similar to mesoporous KIT-1 [7]. The resulting materials show higher hydrothermal stability, surface acid strength and cracking activities than Al-MCM-41.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Nanosized AlKIT-1 Mesoporous Molecular Sieve and its Catalytic Performance for the Conversion of 1,2,4-Trimethylbenzene

et al. 2011

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Nanosized mesoporous AlKIT-1 molecular sieve was hydrothermally synthesized in the absence of organic salts. The samples were characterized by X-ray diffraction, electron microscopy (TEM and SEM), N 2 adsorption isotherm, and NH 3 -TPD methods. The AlKIT-1 has a particle size of about 60-100 nm, and a threedimensional network structure with average pore size of 2.7 nm. The sample exhibits good hydrothermal stability and catalytic performance for 1,2,4-trimethylbenzene, suggesting its promising applications in the conversion of large molecules.

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“…This result is repeatable. This may cause from further desorption of the hydroxyl groups from the mesoporous materials [7]. …”

Section: Transmission Electron Microscopy and Scanning Electron Micromentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Nanosized AlKIT-1 Mesoporous Molecular Sieve and its Catalytic Performance for the Conversion of 1,2,4-Trimethylbenzene

et al. 2011

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“…Among the mesoporous materials currently available, aluminum-containing hexagonally ordered mesostructured molecular sieves (Al-MCM-41) are extremely attractive because of their potential applications in catalysis (On and Kaliaguine, 2001;Verhoef et al, 2001;Zhao et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Direct synthesis of mesoporous aluminosilicate using natural clay from low-grade potash ores of a salt lake in Qinghai, China, and its use in octadecylamine adsorption

Sun

Zhang

Wang

et al. 2015

Applied Clay Science

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“…Interesting studies have been geared toward acid-catalysed reactions of large molecules [6]. Hence the relationship between the acidity and catalytic behaviour of these materials is of great interest.…”

Section: Introductionmentioning

confidence: 99%

<b>CATALYTIC PROPERTIES AND ACIDITY OF MODIFIED MCM-41 MESOPOROUS MATERIALS WITH LOW Si/Al RATIO: HEPTANE ISOMERISATION</b>

Belhakem

Bengueddach

2006

Bull. Chem. Soc. Eth.

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ABSTRACT. The catalytic properties and acidity of modified MCM-41 with a low Si/Al ratio and 0-95% NH 4 + exchange were investigated. The samples were characterised by X-ray diffraction, scanning and transmission electron microscopy, and nitrogen adsorption. The acidity was studied by pyridine adsorption, temperature programmed desorption (TPD) of ammonia, and infrared (IR) spectroscopy. Adsorption of pyridine and IR spectroscopy indicated various types of Lewis and Brönsted acid sites. The density distribution of acid sites was determined by TPD. Both Lewis and Brönsted acid sites were found to be active in the heptane isomerisation. The presence of aluminium (low Si/Al) combined to the ionic exchange between Na + and NH 4 + increases the acidity of MCM-41 materials. A close correlation between acidity and isomerisation was observed. Coke deposition, which reduces the activity, was also studied.

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Comparison of disordered mesoporous aluminosilicates with highly ordered Al-MCM-41 on stability, acidity and catalytic activity

Cited by 57 publications

References 32 publications

Synthesis of Nanosized AlKIT-1 Mesoporous Molecular Sieve and its Catalytic Performance for the Conversion of 1,2,4-Trimethylbenzene

Synthesis of Nanosized AlKIT-1 Mesoporous Molecular Sieve and its Catalytic Performance for the Conversion of 1,2,4-Trimethylbenzene

Direct synthesis of mesoporous aluminosilicate using natural clay from low-grade potash ores of a salt lake in Qinghai, China, and its use in octadecylamine adsorption

<b>CATALYTIC PROPERTIES AND ACIDITY OF MODIFIED MCM-41 MESOPOROUS MATERIALS WITH LOW Si/Al RATIO: HEPTANE ISOMERISATION</b>

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