Parametric Investigation of Rate Enhancement during fast Temperature Cycling of CO Oxidation in Microreactors

Søren Jensen, Sune Thorsteinsson, Ole Hansen, Ulrich Quaade

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A new microreactor that allows investigation of the effects of temperature oscillations at frequencies 10 times higher than in previous systems is presented. As an example, we investigate CO oxidation over a supported Pt catalyst subjected to a fast forced oscillation of the reactor temperature and confirm earlier findings of reaction rate enhancements. The enhancement is shown to increase at high frequencies. Varying the conversion and temperature oscillation amplitude is shown to have a large effect on the rate enhancement, and a large interaction between the two parameters is detected. For the best parameter setting, reaction rates 70% higher than during slow steady-state-like oscillations are observed.
Original languageEnglish
JournalChemical Engineering Journal
Volume135
Issue numberS1
Pages (from-to)S237-S241
ISSN1385-8947
DOIs
Publication statusPublished - 2008

Keywords

  • Temperature cycling
  • Unsteady-state processing
  • Microreactor

Cite this

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title = "Parametric Investigation of Rate Enhancement during fast Temperature Cycling of CO Oxidation in Microreactors",
abstract = "A new microreactor that allows investigation of the effects of temperature oscillations at frequencies 10 times higher than in previous systems is presented. As an example, we investigate CO oxidation over a supported Pt catalyst subjected to a fast forced oscillation of the reactor temperature and confirm earlier findings of reaction rate enhancements. The enhancement is shown to increase at high frequencies. Varying the conversion and temperature oscillation amplitude is shown to have a large effect on the rate enhancement, and a large interaction between the two parameters is detected. For the best parameter setting, reaction rates 70{\%} higher than during slow steady-state-like oscillations are observed.",
keywords = "Temperature cycling, Unsteady-state processing, Microreactor",
author = "S{\o}ren Jensen and Sune Thorsteinsson and Ole Hansen and Ulrich Quaade",
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language = "English",
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Parametric Investigation of Rate Enhancement during fast Temperature Cycling of CO Oxidation in Microreactors. / Jensen, Søren; Thorsteinsson, Sune; Hansen, Ole; Quaade, Ulrich.

In: Chemical Engineering Journal, Vol. 135, No. S1, 2008, p. S237-S241.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Parametric Investigation of Rate Enhancement during fast Temperature Cycling of CO Oxidation in Microreactors

AU - Jensen, Søren

AU - Thorsteinsson, Sune

AU - Hansen, Ole

AU - Quaade, Ulrich

PY - 2008

Y1 - 2008

N2 - A new microreactor that allows investigation of the effects of temperature oscillations at frequencies 10 times higher than in previous systems is presented. As an example, we investigate CO oxidation over a supported Pt catalyst subjected to a fast forced oscillation of the reactor temperature and confirm earlier findings of reaction rate enhancements. The enhancement is shown to increase at high frequencies. Varying the conversion and temperature oscillation amplitude is shown to have a large effect on the rate enhancement, and a large interaction between the two parameters is detected. For the best parameter setting, reaction rates 70% higher than during slow steady-state-like oscillations are observed.

AB - A new microreactor that allows investigation of the effects of temperature oscillations at frequencies 10 times higher than in previous systems is presented. As an example, we investigate CO oxidation over a supported Pt catalyst subjected to a fast forced oscillation of the reactor temperature and confirm earlier findings of reaction rate enhancements. The enhancement is shown to increase at high frequencies. Varying the conversion and temperature oscillation amplitude is shown to have a large effect on the rate enhancement, and a large interaction between the two parameters is detected. For the best parameter setting, reaction rates 70% higher than during slow steady-state-like oscillations are observed.

KW - Temperature cycling

KW - Unsteady-state processing

KW - Microreactor

U2 - 10.1016/j.cej.2007.07.031

DO - 10.1016/j.cej.2007.07.031

M3 - Journal article

VL - 135

SP - S237-S241

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

IS - S1

ER -