The use of stopped-flow gas chromatography to study the catalytic dehydration of alcohols

Lane, R. M.; Lane, Bruce; Phillips, C. S. G.

doi:10.1016/0021-9517(70)90323-4

Cited by 20 publications

(1 citation statement)

References 6 publications

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“…Acid catalysts such as amorphous silica-alumina, zeolite, and alumina containing Brønsted acid sites (BASs), Lewis acid sites (LASs), or both can effectively catalyze the reaction. , Among these catalysts, γ-Al 2 O 3 is practically used for alcohol dehydration reactions with high selectivity and stability . Although γ-Al 2 O 3 has been used as an alcohol dehydration catalyst for several decades, − the reaction mechanisms regarding critical reaction intermediates and active sites on the catalyst remain controversial.…”

Section: Introductionmentioning

confidence: 99%

Impact of Adsorption Configurations on Alcohol Dehydration over Alumina Catalysts

et al. 2022

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The dehydration of alcohols to value-added chemicals using alumina catalysts has been industrialized decades ago; however, despite years of fundamental research, the molecular-level understanding of the reaction process is still lacking. Herein, the dehydration reactions of ethanol on two representative aluminas, i.e., γ-Al2O3 and five-coordinated Al-rich Al2O3-nanosheet (Al2O3-NS), are comparatively investigated by a combination of solid-state NMR spectroscopy and reaction evaluations. NMR results reveal that the presence of hydroxyl groups nearby the Lewis acid sites (LASs) leads to different ethanol adsorption modes. The surface hydroxyls nearby LASs interfere with ethanol adsorption, which causes the methyl group to move away from the alumina surface and hinders the elimination of β-H, resulting in low reaction activity. In addition, the desorption property of surface hydroxyls will affect the dehydration reaction as they participate in the catalytic reaction cycles. Such effects may also explain the lower reaction activities for diethyl ether to ethylene compared with ethanol. Although both four- and five-coordinated Als are the possible active sites for ethanol dehydration, the reactivity of alcohol dehydration may also be substantially affected by the local environment of undercoordinated Als besides coordination numbers. These new insights demonstrate that the host–guest interaction regulated by the local environment of active sites plays an important role in the catalytic reaction.

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Section: Introductionmentioning

confidence: 99%

Impact of Adsorption Configurations on Alcohol Dehydration over Alumina Catalysts

et al. 2022

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Chromatography and Intermolecular Forces

Phillips

1973

Ber Bunsenges Phys Chem

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Various chromatographic techniques are outlined which provide simple, rapid, and precise methods for the determination of many thermodynamic and kinetic parameters of great interest to the physical chemist. The paper emphasises the need to pay attention to particular experimental details and to understand the way in which most chromatographic experiments have been influenced by the desire to solve purely analytical problems.

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ChemInform Abstract: DIE VERWENDUNG DER GAS‐FESTKOERPER‐CHROMATOGRAPHIE BEI PERIODISCH UNTERBROCHENEM GASSTROM ZUR UNTERSUCHUNG DER KATALYTISCHEN DEHYDRATISIERUNG VON ALKOHOLEN

Lane¹,

Lane²,

Phillips³

1971

Chemischer Informationsdienst. Organische Chemie

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The use of stopped-flow gas chromatography to study the catalytic dehydration of alcohols

Cited by 20 publications

References 6 publications

Impact of Adsorption Configurations on Alcohol Dehydration over Alumina Catalysts

Impact of Adsorption Configurations on Alcohol Dehydration over Alumina Catalysts

Chromatography and Intermolecular Forces

ChemInform Abstract: DIE VERWENDUNG DER GAS‐FESTKOERPER‐CHROMATOGRAPHIE BEI PERIODISCH UNTERBROCHENEM GASSTROM ZUR UNTERSUCHUNG DER KATALYTISCHEN DEHYDRATISIERUNG VON ALKOHOLEN

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