Microcalorimetric and spectroscopic studies of the acidic- and physisorption characteristics of MCM-41 and zeolites

Jänchen, J.; Stach, H.; Busio, Mcm Marc; Wolput, van Jhmc Jos

doi:10.1016/s0040-6031(97)00438-3

Cited by 51 publications

(34 citation statements)

References 31 publications

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“…The smaller pore system apparently is a stronger absorbent for 1,3,5-TiPB. This observation is in line with the results obtained from recent calorimetric experiments of hydrocarbon adsorption on mesoporous aluminosilicates [29,30]. Jänchen et al [29] measured heat of adsorption of several probes.…”

Section: Confinement Effect During Cracking Reactionsupporting

confidence: 89%

“…This observation is in line with the results obtained from recent calorimetric experiments of hydrocarbon adsorption on mesoporous aluminosilicates [29,30]. Jänchen et al [29] measured heat of adsorption of several probes. They found whereas the heats of adsorption of acetonitrile are mainly influenced by a specific interaction on acidic sites in molecular sieves, the adsorption heat of non-polar substance is determined by pore size; the smaller the pore size the higher the heat of adsorption.…”

Section: Confinement Effect During Cracking Reactionsupporting

confidence: 89%

“…This system is chosen because the size effects on the adsorption of hydrocarbons into the nanochannels have been carefully studied by calorimetry [29][30][31]. Since the first step in catalytic cracking is the adsorption of the reactant into the acidic porous materials, one would have a good basis to examine the pore size effect on catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

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On the Confinement Effect During Catalytic Reaction Over Al-MCM-41

et al. 2008

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A comprehensive study has been made on the cracking abilities of mesoporous aluminosillicate MCM-41 materials with different Si/Al ratios (15-?) and pore diameters (1.6-3.0 nm) by using 1,3,5-triisopropylbenzene (1,3,5-TiPB) cracking as the test reaction. The roles of Al content and pore diameter on the catalytic features of the samples were evaluated by the conversion of 1,3,5-TiPB, coke content and deactivation parameters. It is found that the catalytic activity is mainly controlled by adsorptive properties towards the reactant and the dispersion of acid sites. In terms of their catalytic performances, cracking reaction over aluminosilicate mesoporous materials is more favorable for catalysts with smaller pore size and higher Al concentration. Moreover, coking is found responsible for catalyst deactivation during 1,3,5-TiPB cracking reaction over Al-MCM-41.

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Section: Confinement Effect During Cracking Reactionsupporting

confidence: 89%

Section: Confinement Effect During Cracking Reactionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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On the Confinement Effect During Catalytic Reaction Over Al-MCM-41

et al. 2008

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“…Polar molecules with different gas phase affinities such as alcohol and water are usually used to measure the hydrophilic and hydrophobic properties of the surface of materials [26][27][28][29][30]. The differential heat and saturation coverage reflect the proton affinity and the strength of H-bonds or van der Waals forces on those samples.…”

Section: H 2 O Adsorption Microcalorimetrymentioning

confidence: 99%

Dehydration of methanol to dimethyl ether over Nb2O5 and NbOPO4 catalysts: Microcalorimetric and FT-IR studies

Sun

Yang

et al. 2007

Journal of Molecular Catalysis A: Chemical

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“…Adsorption of N 2 [16][17][18][19][20][21][22] and water [18,[23][24][25] on MCM-41 has been thoroughly investigated. There are also some studies based on heavier hydrocarbons, such as benzene [26,27], toluene [28], cyclopentane [29,30], cyclohexane [29][30][31][32], propane, and methane [33] on MCM-41.…”

Section: Introductionmentioning

confidence: 99%