Kinetics of acetic acid synthesis from ethanol over a Cu/SiO2 catalyst

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Standard

Kinetics of acetic acid synthesis from ethanol over a Cu/SiO2 catalyst. / Voss, Bodil; Schjødt, Niels Christian; Grunwaldt, Jan-Dierk; Andersen, Simon Ivar; Woodley, John.

In: Applied Catalysis A: General, Vol. 402, No. 1-2, 2011, p. 69-79.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Harvard

Voss, B, Schjødt, NC, Grunwaldt, J-D, Andersen, SI & Woodley, J 2011, 'Kinetics of acetic acid synthesis from ethanol over a Cu/SiO2 catalyst' Applied Catalysis A: General, vol 402, no. 1-2, pp. 69-79., 10.1016/j.apcata.2011.05.030

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Vancouver

Author

Voss, Bodil; Schjødt, Niels Christian; Grunwaldt, Jan-Dierk; Andersen, Simon Ivar; Woodley, John / Kinetics of acetic acid synthesis from ethanol over a Cu/SiO2 catalyst.

In: Applied Catalysis A: General, Vol. 402, No. 1-2, 2011, p. 69-79.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{15722e4c1ee94f03ba0285bce672efc3,
title = "Kinetics of acetic acid synthesis from ethanol over a Cu/SiO2 catalyst",
keywords = "Step sites, Kinetics, Ethanol dehydrogenation, Cu crystal, Acetic acid",
publisher = "Elsevier BV",
author = "Bodil Voss and Schjødt, {Niels Christian} and Jan-Dierk Grunwaldt and Andersen, {Simon Ivar} and John Woodley",
year = "2011",
doi = "10.1016/j.apcata.2011.05.030",
volume = "402",
number = "1-2",
pages = "69--79",
journal = "Applied Catalysis A: General",
issn = "0926-860X",

}

RIS

TY - JOUR

T1 - Kinetics of acetic acid synthesis from ethanol over a Cu/SiO2 catalyst

A1 - Voss,Bodil

A1 - Schjødt,Niels Christian

A1 - Grunwaldt,Jan-Dierk

A1 - Andersen,Simon Ivar

A1 - Woodley,John

AU - Voss,Bodil

AU - Schjødt,Niels Christian

AU - Grunwaldt,Jan-Dierk

AU - Andersen,Simon Ivar

AU - Woodley,John

PB - Elsevier BV

PY - 2011

Y1 - 2011

N2 - The dehydrogenation of ethanol via acetaldehyde for the synthesis of acetic acid over a Cu based catalyst in a new process is reported. Specifically, we have studied a Cu on SiO2 catalyst which has shown very high selectivity to acetic acid via acetaldehyde compared to competing condensation routes. The dehydrogenation experiments were carried out in a flow through lab scale tubular reactor. Based on 71 data sets a power law kinetic expression has been derived for the description of the dehydrogenation of acetaldehyde to acetic acid. The apparent reaction order was 0.89 with respect to water and 0.45 with respect to acetaldehyde, and the apparent activation energy was 33.8kJ/mol. The proposed oxidation of acetaldehyde with hydroxyl in the elementary rate determining step is consistent with these both. Density Functional Theory (DFT) calculations show the preference of water cleavage at the Cu step sites. In light of this, an observed intrinsic activity difference between whole catalyst pellets and crushed pellets may be explained by the Cu crystal size and growth rate being functions of the catalyst particle size and time.

AB - The dehydrogenation of ethanol via acetaldehyde for the synthesis of acetic acid over a Cu based catalyst in a new process is reported. Specifically, we have studied a Cu on SiO2 catalyst which has shown very high selectivity to acetic acid via acetaldehyde compared to competing condensation routes. The dehydrogenation experiments were carried out in a flow through lab scale tubular reactor. Based on 71 data sets a power law kinetic expression has been derived for the description of the dehydrogenation of acetaldehyde to acetic acid. The apparent reaction order was 0.89 with respect to water and 0.45 with respect to acetaldehyde, and the apparent activation energy was 33.8kJ/mol. The proposed oxidation of acetaldehyde with hydroxyl in the elementary rate determining step is consistent with these both. Density Functional Theory (DFT) calculations show the preference of water cleavage at the Cu step sites. In light of this, an observed intrinsic activity difference between whole catalyst pellets and crushed pellets may be explained by the Cu crystal size and growth rate being functions of the catalyst particle size and time.

KW - Step sites

KW - Kinetics

KW - Ethanol dehydrogenation

KW - Cu crystal

KW - Acetic acid

U2 - 10.1016/j.apcata.2011.05.030

DO - 10.1016/j.apcata.2011.05.030

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

SN - 0926-860X

IS - 1-2

VL - 402

SP - 69

EP - 79

ER -