Beitrag zur Entwicklung eines Niedertemperatur-Oxidationskatalysators für die Anwendung in Industriegasen mit LaCoO3 als Aktivphase

Translated title of the contribution: Contribution in developing a low temperature oxidation catalyst used in industrial flue gases with LaCoO3 as active phase

Matthias Schebeck

Research output: ThesisMaster's Thesis

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Abstract

In this thesis the supported catalyst LaCoO3/ZrO2 is evaluated for CO Oxidation in industrial flue gases at low temperatures below 250 °C. Initially, the catalytic material is in powder form. Application oriented investigations require an immobilization of this ceramic powder. Therefore, various techniques are presented in princi-ple, out of which the washcoating technique is used to test coating porous TiO2 honeycombs. Possible deactivation mechanisms are discussed as well. Especially, a generally valid model for the capillary condensation of sulfuric acid solutions is developed. The model is based on the Kelvin equation and indicates a hindered condensation in pores smaller 2 µm due to the capillary curvature induced undercut of the vapor pressure. Additionally, thermogravimetric analyses and tests in a tube reactor are performed. They show partially a deactivation of LaCoO3 by SO2. Finally, based on the gained knowledge, suggestions for future research are presented.
Translated title of the contributionContribution in developing a low temperature oxidation catalyst used in industrial flue gases with LaCoO3 as active phase
Original languageGerman
QualificationDipl.-Ing.
Awarding Institution
  • Montanuniversität
Supervisors/Advisors
  • Weiß, Christian, Supervisor (internal)
Award date12 Apr 2019
Publication statusPublished - 2019

Bibliographical note

embargoed until null

Keywords

  • CO Oxidation
  • supported catalyst
  • flue gases
  • low temperature oxidation
  • sulfuric acid condensation
  • pore condensation

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