A microkinetic model of the methanol oxidation over silver

A. Andreasen; H. Lynggaard; C. Stegelmann; P. Stoltze

doi:10.1016/j.susc.2003.08.007

A microkinetic model of the methanol oxidation over silver

A. Andreasen, H. Lynggaard, C. Stegelmann, P. Stoltze

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A simple microkinetic model for the oxidation of methanol on silver based on surface science studies at UHV and low temperatures has been formulated. The reaction mechanism is a simple Langmuir-Hinshelwood mechanism, with one type of active oxygen and one route to formaldehyde and carbon dioxide, respectively. The model explains observed reaction orders, selectivity, apparent activation enthalpies and the choice of industrial reaction conditions. More interesting the model disproves the notion that the mechanism deduced from surface science in UHV cannot be responsible for formaldehyde synthesis at industrial steady-state conditions. The present work therefore seriously questions the prevailing models of formaldehyde synthesis in the literature. One of the reasons for this controversy is that many of the models in the literature are derived from transient experiments exhibiting dynamic effects that are not present at steady state under industrial conditions. (C) 2003 Elsevier B.V. All rights reserved.

Original language	English
Journal	Surface Science
Volume	544
Issue number	1
Pages (from-to)	5-23
ISSN	0039-6028
DOIs	https://doi.org/10.1016/j.susc.2003.08.007
Publication status	Published - 2003

Bibliographical note

This article may be downloaded for personal use only. Any other use requires prior permission of the author and the publisher

Access to Document

10.1016/j.susc.2003.08.007

http://www.risoe.dtu.dk/rispubl/art/2006_17.pdf

OpenUrl availability

Full text

Cite this

@article{64189b3d1622499d8cade2b9e0e5e3df,

title = "A microkinetic model of the methanol oxidation over silver",

abstract = "A simple microkinetic model for the oxidation of methanol on silver based on surface science studies at UHV and low temperatures has been formulated. The reaction mechanism is a simple Langmuir-Hinshelwood mechanism, with one type of active oxygen and one route to formaldehyde and carbon dioxide, respectively. The model explains observed reaction orders, selectivity, apparent activation enthalpies and the choice of industrial reaction conditions. More interesting the model disproves the notion that the mechanism deduced from surface science in UHV cannot be responsible for formaldehyde synthesis at industrial steady-state conditions. The present work therefore seriously questions the prevailing models of formaldehyde synthesis in the literature. One of the reasons for this controversy is that many of the models in the literature are derived from transient experiments exhibiting dynamic effects that are not present at steady state under industrial conditions. (C) 2003 Elsevier B.V. All rights reserved. ",

author = "A. Andreasen and H. Lynggaard and C. Stegelmann and P. Stoltze",

note = "This article may be downloaded for personal use only. Any other use requires prior permission of the author and the publisher",

year = "2003",

doi = "10.1016/j.susc.2003.08.007",

language = "English",

volume = "544",

pages = "5--23",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - A microkinetic model of the methanol oxidation over silver

AU - Andreasen, A.

AU - Lynggaard, H.

AU - Stegelmann, C.

AU - Stoltze, P.

N1 - This article may be downloaded for personal use only. Any other use requires prior permission of the author and the publisher

PY - 2003

Y1 - 2003

N2 - A simple microkinetic model for the oxidation of methanol on silver based on surface science studies at UHV and low temperatures has been formulated. The reaction mechanism is a simple Langmuir-Hinshelwood mechanism, with one type of active oxygen and one route to formaldehyde and carbon dioxide, respectively. The model explains observed reaction orders, selectivity, apparent activation enthalpies and the choice of industrial reaction conditions. More interesting the model disproves the notion that the mechanism deduced from surface science in UHV cannot be responsible for formaldehyde synthesis at industrial steady-state conditions. The present work therefore seriously questions the prevailing models of formaldehyde synthesis in the literature. One of the reasons for this controversy is that many of the models in the literature are derived from transient experiments exhibiting dynamic effects that are not present at steady state under industrial conditions. (C) 2003 Elsevier B.V. All rights reserved.

AB - A simple microkinetic model for the oxidation of methanol on silver based on surface science studies at UHV and low temperatures has been formulated. The reaction mechanism is a simple Langmuir-Hinshelwood mechanism, with one type of active oxygen and one route to formaldehyde and carbon dioxide, respectively. The model explains observed reaction orders, selectivity, apparent activation enthalpies and the choice of industrial reaction conditions. More interesting the model disproves the notion that the mechanism deduced from surface science in UHV cannot be responsible for formaldehyde synthesis at industrial steady-state conditions. The present work therefore seriously questions the prevailing models of formaldehyde synthesis in the literature. One of the reasons for this controversy is that many of the models in the literature are derived from transient experiments exhibiting dynamic effects that are not present at steady state under industrial conditions. (C) 2003 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.susc.2003.08.007

DO - 10.1016/j.susc.2003.08.007

M3 - Journal article

VL - 544

SP - 5

EP - 23

JO - Surface Science

JF - Surface Science

SN - 0039-6028

IS - 1

ER -

A microkinetic model of the methanol oxidation over silver

Abstract

Bibliographical note

Access to Document

OpenUrl availability

Fingerprint

Cite this