Journal ArticleDOI
Mechanistic Study of Alcohol Dehydration on γ-Al2O3
Sounak Roy,Giannis Mpourmpakis,Do-Young Hong,Do-Young Hong,Dionisios G. Vlachos,Aditya Bhan,Raymond J. Gorte,Raymond J. Gorte +7 more
TLDR
In this paper, the acid sites on γ-Al2O3 were characterized using FTIR spectroscopy of adsorbed pyridine and temperature programmed desorption (TPD) of 2-propanamine, ethanol, 1-Propanol, 2-methyl-2propanol.Abstract:
The acid sites on γ-Al2O3 were characterized using FTIR spectroscopy of adsorbed pyridine and temperature programmed desorption (TPD) of 2-propanamine, ethanol, 1-propanol, 2-propanol, and 2-methyl-2-propanol, together with density functional theory (DFT) calculations. Following room-temperature adsorption and evacuation, the surface coverages of the adsorbed alcohols were between 2 and 3.2 × 1018 molecules/m2. For each of the adsorbed alcohols, reaction to olefin and water products occurred in a narrow peak that indicated reaction is a first-order process with a well-defined activation energy, which in turn depended strongly on the particular alcohol. DFT calculations on an Al8O12 cluster are in excellent agreement with the experimental observations and show that the transition states for dehydration had carbenium-ion character. The carbenium ion stability in terms of proton affinity (of alkenes) matches well with the activation energy of the dehydration reaction. Adsorption of water on the γ-Al2O3, foll...read more
Citations
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Recent Advances in Catalytic Conversion of Ethanol to Chemicals
Junming Sun,Yong Wang +1 more
TL;DR: A detailed summary of recent advances in catalytic conversion of ethanol to a wide range of chemicals and fuels can be found in this article, where the authors particularly focus on catalyst advances and fundamental understanding of reaction mechanisms involved in ethanol steam reforming.
Journal ArticleDOI
Catalysis Chemistry of Dimethyl Ether Synthesis
TL;DR: In this paper, the authors pay close attention to recent advances on the evolution of catalysts for direct dehydration from methanol and for the tandem catalysis from synthesis gas (syngas).
Journal ArticleDOI
Effect of hydrogen donor on liquid phase catalytic transfer hydrogenation of furfural over a Ru/RuO2/C catalyst
TL;DR: In this article, the effect of alcohol hydrogen donor on methyl furan production through catalytic transfer hydrogenation of furfural in the liquid phase has been investigated over a mildly calcined Ru/C catalyst in the temperature range of 110-200°C.
Journal ArticleDOI
Toward Understanding Metal-Catalyzed Ethanol Reforming
Daniela Zanchet,João Batista Oliveira dos Santos,Sonia Damyanova,Jean Marcel R. Gallo,José Maria C. Bueno +4 more
TL;DR: In this article, the authors analyze the reaction pathways for metal-catalyzed steam reforming of ethanol and discuss the available experimental and theoretical data to suggest alternatives to address three major issues: (i) the impact of particle size and metal oxidation state.
Journal ArticleDOI
Dehydration of ethanol over zeolites, silica alumina and alumina: Lewis acidity, Brønsted acidity and confinement effects
TL;DR: In this paper, the authors used FT-IR spectroscopy of the surface OH groups and adsorbed CO and pyridine to characterize the catalysts of a commercial H-FER, H-MFI and H-BEA.
References
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Journal Article
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