Ultrasound-assisted selective hydrogenation of C-5 acetylene alcohols with Lindlar catalysts

B. Tripathi; L. Paniwnyk; N. Cherkosov; A.O. Ibhadon; T. Lana-Villarreal; R. Gomez

doi:10.1016/j.ultsonch.2015.03.006

Ultrasound-assisted selective hydrogenation of C-5 acetylene alcohols with Lindlar catalysts

B. Tripathi, L. Paniwnyk, N. Cherkosov, A.O. Ibhadon, T. Lana-Villarreal, R. Gomez

European Commission for the MAPSYN project

Research output: Contribution to journal › Article › peer-review

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Abstract

The selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) was performed in the presence of Lindlar catalyst, comparing conventional stirring with sonication at different frequencies of 40, 380 and 850 kHz. Under conventional stirring, the reaction rates were limited by intrinsic kinetics, while in the case of sonication, the reaction rates were 50–90% slower. However, the apparent reaction rates were found to be significantly frequency dependent with the highest rate observed at 40 kHz. The original and the recovered catalysts after the hydrogenation reaction were compared using bulk elemental analysis, powder X-ray diffraction and scanning and transmission electron microscopy coupled with energy-dispersive X-ray analysis. The studies showed that sonication led to the frequency-dependent fracturing of polycrystalline support particles with the highest impact caused by 40 kHz sonication, while monocrystals were undamaged. In contrast, the leaching of Pd/Pb particles did not depend on the frequency, which suggests that sonication removed only loosely-bound catalyst particles.

Original language	English
Pages (from-to)	445-451
Journal	Ultrasonics Sonochemistry
Volume	26
Early online date	12 Mar 2015
DOIs	https://doi.org/10.1016/j.ultsonch.2015.03.006
Publication status	Published - Sept 2015

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Ultrasonics Sonochemistry. 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 Ultrasonics Sonochemistry, [26, (2015)] DOI: 10.1016/j.ultsonch.2015.03.006

© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Keywords

Ultrasound
Semihydrogenation
Lindlar catalyst
Alkynol
Palladium

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title = "Ultrasound-assisted selective hydrogenation of C-5 acetylene alcohols with Lindlar catalysts",

abstract = "The selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) was performed in the presence of Lindlar catalyst, comparing conventional stirring with sonication at different frequencies of 40, 380 and 850 kHz. Under conventional stirring, the reaction rates were limited by intrinsic kinetics, while in the case of sonication, the reaction rates were 50–90% slower. However, the apparent reaction rates were found to be significantly frequency dependent with the highest rate observed at 40 kHz. The original and the recovered catalysts after the hydrogenation reaction were compared using bulk elemental analysis, powder X-ray diffraction and scanning and transmission electron microscopy coupled with energy-dispersive X-ray analysis. The studies showed that sonication led to the frequency-dependent fracturing of polycrystalline support particles with the highest impact caused by 40 kHz sonication, while monocrystals were undamaged. In contrast, the leaching of Pd/Pb particles did not depend on the frequency, which suggests that sonication removed only loosely-bound catalyst particles.",

keywords = "Ultrasound, Semihydrogenation, Lindlar catalyst, Alkynol, Palladium",

author = "B. Tripathi and L. Paniwnyk and N. Cherkosov and A.O. Ibhadon and T. Lana-Villarreal and R. Gomez",

note = "NOTICE: this is the author{\textquoteright}s version of a work that was accepted for publication in Ultrasonics Sonochemistry. 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 Ultrasonics Sonochemistry, [26, (2015)] DOI: 10.1016/j.ultsonch.2015.03.006 {\textcopyright} 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International ",

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AU - Tripathi, B.

AU - Paniwnyk, L.

AU - Cherkosov, N.

AU - Ibhadon, A.O.

AU - Lana-Villarreal, T.

AU - Gomez, R.

N1 - NOTICE: this is the author’s version of a work that was accepted for publication in Ultrasonics Sonochemistry. 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 Ultrasonics Sonochemistry, [26, (2015)] DOI: 10.1016/j.ultsonch.2015.03.006 © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

PY - 2015/9

Y1 - 2015/9

N2 - The selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) was performed in the presence of Lindlar catalyst, comparing conventional stirring with sonication at different frequencies of 40, 380 and 850 kHz. Under conventional stirring, the reaction rates were limited by intrinsic kinetics, while in the case of sonication, the reaction rates were 50–90% slower. However, the apparent reaction rates were found to be significantly frequency dependent with the highest rate observed at 40 kHz. The original and the recovered catalysts after the hydrogenation reaction were compared using bulk elemental analysis, powder X-ray diffraction and scanning and transmission electron microscopy coupled with energy-dispersive X-ray analysis. The studies showed that sonication led to the frequency-dependent fracturing of polycrystalline support particles with the highest impact caused by 40 kHz sonication, while monocrystals were undamaged. In contrast, the leaching of Pd/Pb particles did not depend on the frequency, which suggests that sonication removed only loosely-bound catalyst particles.

AB - The selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) was performed in the presence of Lindlar catalyst, comparing conventional stirring with sonication at different frequencies of 40, 380 and 850 kHz. Under conventional stirring, the reaction rates were limited by intrinsic kinetics, while in the case of sonication, the reaction rates were 50–90% slower. However, the apparent reaction rates were found to be significantly frequency dependent with the highest rate observed at 40 kHz. The original and the recovered catalysts after the hydrogenation reaction were compared using bulk elemental analysis, powder X-ray diffraction and scanning and transmission electron microscopy coupled with energy-dispersive X-ray analysis. The studies showed that sonication led to the frequency-dependent fracturing of polycrystalline support particles with the highest impact caused by 40 kHz sonication, while monocrystals were undamaged. In contrast, the leaching of Pd/Pb particles did not depend on the frequency, which suggests that sonication removed only loosely-bound catalyst particles.

KW - Ultrasound

KW - Semihydrogenation

KW - Lindlar catalyst

KW - Alkynol

KW - Palladium

U2 - 10.1016/j.ultsonch.2015.03.006

DO - 10.1016/j.ultsonch.2015.03.006

M3 - Article

SN - 1350-4177

SN - 1873-2828

VL - 26

SP - 445

EP - 451

JO - Ultrasonics Sonochemistry

JF - Ultrasonics Sonochemistry

ER -

Ultrasound-assisted selective hydrogenation of C-5 acetylene alcohols with Lindlar catalysts

Abstract

Bibliographical note

Keywords

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