Butan-1-ol and butan-2-ol dehydration on nitrided aluminophosphates: influence of nitridation on reaction pathways

Delsarte, Stéphanie; Grange, Paul

doi:10.1016/j.apcata.2003.09.030

Cited by 34 publications

(29 citation statements)

References 25 publications

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“…This suggests that both mechanism (E1 and E2) may take place simultaneously during the 2-butanol dehydration reaction. This assumption was previously stated by other authors 14,60 based on the product distribution. In our case, this supposition is supported by the similar rate constant obtained for the formation of the carbocation (k obtained by the A model, it can be observed that the former are higher because in this case the determining rate step is the carbocation formation.…”

Section: -Butanol Decomposition Kinetics Modelsmentioning

confidence: 86%

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Kinetic study of the decomposition of 2‐butanol on carbon‐based acid catalyst

et al. 2009

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in Wiley InterScience (www.interscience.wiley.com).The catalytic conversion of 2-butanol on a carbon-based acid catalyst prepared by chemical activation of olive stone with phosphoric acid was investigated. The carbon catalyst showed a considerable amount of surface phosphorus, presumably in form of phosphate groups, as revealed by XPS, despite a washing step carried out after the activation process. Conversion of 2-butanol yields mainly dehydration products, mostly cis-2-butene and trans-2-butene with lower amounts of 1-butene, and a very small amount of mek as dehydrogenation product. Kinetic interpretation of the experimental data was performed using two elimination mechanisms for the dehydration reaction; an E1-mechanism (two-step mechanism) and an E2-mechanism (one-step mechanism). The rate expressions derived from both models fit properly the experimental results, suggesting that probably the two mechanisms occur simultaneously. This is supported by the similar rate constant obtained for the formation of the carbocation and the olefins in the E1 and E2 mechanisms, respectively. V

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Section: -Butanol Decomposition Kinetics Modelsmentioning

confidence: 86%

“…This value is high if compared with other acid catalysts described in the literature. 14,52,53 The high-surface acidity may be ascribed to the presence of phosphate groups on the surface of the carbons.…”

Section: Catalyst Characterizationmentioning

confidence: 98%

Kinetic study of the decomposition of 2‐butanol on carbon‐based acid catalyst

et al. 2009

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“…The replacement of the M-OH or MO 4 -groups (M = Si, C, or Al) by M-NH x species during nitridation provides a decrease in the number of both Brønsted and Lewis acid sites. As a consequence, these species are more responsible for the basic properties of the CN solids than the stable nitrogen or oxygen framework atoms [21,30]. Based on these considerations, the XPS experiments (Fig.…”

Section: Chemical Analysis and Xps Spectroscopymentioning

confidence: 99%

“…As ammonia was liberated in an alkaline digestion at 400°C using melted KOH, it was possible to determine the nitrogen content, as described earlier [21].…”

Section: Characterizationmentioning

confidence: 99%

High Catalytic Activity of Nitrogen-Containing Carbon from Molecular Sieves in Fine Chemistry

et al. 2009

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Nanostructured nitrogen-containing carbon (CNs) were prepared by nanocasting techniques using MCM-41, MCM-22, and FAU molecular sieves. The surface and morphological features of CN were investigated by XRD, SEM, Raman spectroscopy, FTIR, XPS, and N 2 adsorption isotherms. The catalytic activity in a fine chemistry reaction was also evaluated. The amine-functionalized carbon materials studied are potentially of great importance because of their textural features and high catalytic performance towards Knoevenaguel condensation. In addition, variation of the structure of the molecular sieve material from FAU to MCM-41 led to an increase in the conversion from 23 to 80%. This may be correlated to the basic active sites upon incorporation of nitrogen and also an organized CN that provides active, selective, and stable catalysts to the target reaction. The re-use of the MCM-41-CN does not affect the selectivity of the desired product.

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“…The dehydration has usually been carried out with acid catalysts such as mineral acids and solid acids. Various alcohols including methanol, 2-6 butanol, 7,8 hexanol, 9 and glycerol 10 have been converted into attractive intermediates by using suitable catalysts.…”

Section: Introductionmentioning

confidence: 99%

Liquid-phase Dehydration of 1-Phenylethanol to Styrene over an Acidic Resin Catalyst

Khan¹,

Hwang²,

Jhung³

2011

Bulletin of the Korean Chemical Society

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Dehydration of 1-phenylethanol to produce styrene has been studied in liquid phase with three solid acid catalysts such as H-ZSM-5, H-Y and Amberlyst-15. Amberlyst-15 shows the highest conversion and styrene yield, suggesting the applicability of a resin catalyst in the dehydration. The good performance of the Amberlyst-15 may be due to high acid concentration and ready diffusion of reactants and products. A possible reaction scheme (such as the formation of styrene from diphenylethylether) has also been suggested.

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Butan-1-ol and butan-2-ol dehydration on nitrided aluminophosphates: influence of nitridation on reaction pathways

Cited by 34 publications

References 25 publications

Kinetic study of the decomposition of 2‐butanol on carbon‐based acid catalyst

Kinetic study of the decomposition of 2‐butanol on carbon‐based acid catalyst

High Catalytic Activity of Nitrogen-Containing Carbon from Molecular Sieves in Fine Chemistry

Liquid-phase Dehydration of 1-Phenylethanol to Styrene over an Acidic Resin Catalyst

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