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http://dx.doi.org/10.18419/opus-12929
Autor(en): | Beierlein, Dennis Häussermann, Dorothea Traa, Yvonne Klemm, Elias |
Titel: | Rapid aging as a key to understand deactivation of Ni/Al2O3 catalysts applied for the CO2 methanation |
Erscheinungsdatum: | 2021 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 2908-2919 |
Erschienen in: | Catalysis letters 152 (2022), S. 2908-2919 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-129488 http://elib.uni-stuttgart.de/handle/11682/12948 http://dx.doi.org/10.18419/opus-12929 |
ISSN: | 1011-372X 1572-879X |
Zusammenfassung: | We developed a rapid aging method for Ni/Al2O3 methanation catalysts mimicking the real aging in the actual application. The method is based on hydrothermal deactivation of the catalyst at 600 or 700 °C, which leads to a catalyst with nearly constant conversion after a much shorter time period compared to normal aging. The hydrothermally aged catalysts are characterized by N2 adsorption, X-ray powder diffraction, temperature-programmed reduction and H2 chemisorption. The catalytic performance of the aged catalysts is comparable to the one of a catalyst deactivated in a long-term measurement with up to 720 h on stream. The time needed for reaching a stable conversion can be diminished by rapid aging by a factor of 10. The investigations also showed that the long-term deactivation is caused by Ni particle sintering and that the support pores limit the Ni particle size. |
Enthalten in den Sammlungen: | 03 Fakultät Chemie |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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s10562-021-03884-2.pdf | 1,55 MB | Adobe PDF | Öffnen/Anzeigen |
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