Identification of the Active Sites in the Selective Hydrogenation of Acetic Acid to Acetaldehyde on Iron Oxide Catalysts

Pestman, Robert; Koster, R.M.; Boellaard, E.; Kraan, A.M. van der; Ponec, V.

doi:10.1006/jcat.1998.1957

Cited by 64 publications

(43 citation statements)

References 15 publications

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“…[31] They proposed that hydrogen was first bound at the metallic sites and then spilled over to reduce the acid, which was bound at defect sites in the oxide. [32,35,36] Kinetic studies by Rachmady and Vannice supported this mechanism as they demonstrated the reaction fits a Langmuir-Hinshelwood model for two reactants binding at two different types of site. [30,37] XRD analysis of our catalyst showed only metallic iron, and gave no evidence of the oxide (Fig.…”

Section: Mechanism Of Oleic Acid Hydrotreatment With Fe-msnmentioning

confidence: 85%

Supported iron nanoparticles for the hydrodeoxygenation of microalgal oil to green diesel

Kandel

Anderegg

Nelson

et al. 2014

Journal of Catalysis

140

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Iron nanoparticles supported on mesoporous silica nanoparticles (Fe-MSN) catalyze the hydrotreatment of fatty acids with high selectivity for hydrodeoxygenation over decarbonylation and hydrocracking. The catalysis is likely to involve a reverse Mars-Van Krevelen mechanism, in which the surface of iron is partially oxidized by the carboxylic groups of the substrate during the reaction. The strength of the metal-oxygen bonds that are formed affects the residence time of the reactants facilitating the successive conversion of carboxyl first into carbonyl and then into alcohol intermediates, thus dictating the selectivity of the process. The selectivity is also affected by the pretreatment of Fe-MSN, the more reduced the catalyst the higher the yield of hydrodeoxygenation product. Fe-MSN catalyzes the conversion of crude microalgal oil into dieselrange hydrocarbons. Disciplines Materials Chemistry | Other Chemistry | Physical ChemistryComments NOTICE: this is the author's version of a work that was accepted for publication in Journal of Catalysis. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Catalysis, [314, (2014)

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Section: Mechanism Of Oleic Acid Hydrotreatment With Fe-msnmentioning

confidence: 85%

Supported iron nanoparticles for the hydrodeoxygenation of microalgal oil to green diesel

Kandel

Anderegg

Nelson

et al. 2014

Journal of Catalysis

140

View full text Add to dashboard Cite

show abstract

“…Another explanation is that the formed PtSn alloy particles can change the electronic properties of Pt and decrease the size of the surface Pt ensembles, thus inhibiting the cleavage of C-C and C-O bond that lead to the production of CH 4 and C 2 H 6 . Previous studies of acetic acid hydrogenation mainly focused on the reaction mechanism or kinetic behavior, and the data about acetic acid conversion and product selectivity are not much [5][6][7][8]. The ethane selectivity of 10Pt10Sn/A is much lower than that of Pt/TiO 2 and other oxide supported Pt catalysts [8].…”

Section: Performance Of the Catalystsmentioning

confidence: 99%

“…Furthermore, the study of acetic acid hydrogenation has attracted much attention during the past decades. Pestman et al [5][6][7] have accomplished a series of experiments to explore the reactions of carboxylic acids on oxides and the products they obtained from acetic acid are acetone and aldehyde. Studies conducted by Rachmady and Vannice indicated that Pt supported on oxides is a promising catalyst for acetic acid hydrogenation and a product distribution of 50 % ethanol, 30 % ethyl acetate and 20 % ethane can be acquired on TiO 2 supported Pt catalyst [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sn Addition in Gas Phase Hydrogenation of Acetic Acid on Alumina Supported PtSn Catalysts

Zhang

et al. 2014

Catal Lett

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Alumina supported Pt, Sn and PtSn catalysts were prepared by impregnation and tested in the gas phase hydrogenation of acetic acid, and characterized by N 2 -physisorption, XRD, H 2 -TPR, H 2 -pulse chemisorption, H 2 -TPD, DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy), XPS, electron microscopy techniques (TEM, HRTEM and EDX). Results show that Sn addition to Pt/Al 2 O 3 catalyst can improve the conversion of acetic acid and suppress the production of by-products, as well as enhance the selectivity towards ethanol. The optimization of activity and selectivity can be achieved by changing reaction temperature and pressure. Characterizations indicated that the better performance of PtSn/Al 2 O 3 catalyst is due to the formation of PtSn alloy and Pt-SnO x species.

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“…Only minor amounts of H 2 , CO 2 , and CH 4 were produced. Acetone production is promoted by CeO 2 -based materials (at temperatures below 360 • C) [68] and basic oxides, such as Fe 2 O 3 [69]. Unlike ethylene, acetone was not formed under the selected experimental conditions (Fig.…”

Section: Catalytic Activity In Esr For Ru Catalystsmentioning

confidence: 94%

Catalytic behavior of Ru supported on Ce0.8Zr0.2O2 for hydrogen production

Carbajal-Ramos

Gómez

Condó

et al. 2016

Applied Catalysis B: Environmental

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Identification of the Active Sites in the Selective Hydrogenation of Acetic Acid to Acetaldehyde on Iron Oxide Catalysts

Cited by 64 publications

References 15 publications

Supported iron nanoparticles for the hydrodeoxygenation of microalgal oil to green diesel

Supported iron nanoparticles for the hydrodeoxygenation of microalgal oil to green diesel

Effect of Sn Addition in Gas Phase Hydrogenation of Acetic Acid on Alumina Supported PtSn Catalysts

Catalytic behavior of Ru supported on Ce0.8Zr0.2O2 for hydrogen production

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