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 contribution | Contribution in developing a low temperature oxidation catalyst used in industrial flue gases with LaCoO3 as active phase |
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Original language | German |
Qualification | Dipl.-Ing. |
Awarding Institution |
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Supervisors/Advisors |
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Award date | 12 Apr 2019 |
Publication status | Published - 2019 |
Bibliographical note
no embargoKeywords
- CO Oxidation
- supported catalyst
- flue gases
- low temperature oxidation
- sulfuric acid condensation
- pore condensation