Deactivation of supported nickel catalysts during CO methanation
2014 (English)In: Applied Catalysis A: General, ISSN 0926-860X, E-ISSN 1873-3875, Vol. 486, 143-149 p.Article in journal (Refereed) Published
Deactivation of Ni-based catalysts was investigated during CO methanation over different supported catalysts. X-ray diffraction and temperature-programmed hydrogenation analyses were used to investigate nickel particle sintering and carbon formation during the first 24 h on stream. Titania-supported catalysts presented high resistance towards carbon deposition and nickel particle growth in comparison with the other tested catalysts. Particle size effects on these two deactivation causes were also evaluated. It was shown that carbon formation rates are higher on bigger crystal particles. However, it was found that titania-supported nickel catalysts reduced at high temperatures show the opposite effect. This difference is most probably due to a stronger interaction between nickel and TiOx (x < 2) species on smaller crystals which changes the CO dissociation properties and, in consequence, carbon formation rates.
Place, publisher, year, edition, pages
2014. Vol. 486, 143-149 p.
Methanation, Deactivation, Support, Titania, Carbon formation
IdentifiersURN: urn:nbn:se:kth:diva-157220DOI: 10.1016/j.apcata.2014.08.021ISI: 000344439400016ScopusID: 2-s2.0-84908648449OAI: oai:DiVA.org:kth-157220DiVA: diva2:769767
FunderEU, FP7, Seventh Framework Programme, 308733Swedish Energy Agency
QC 201412092014-12-092014-12-082016-08-17Bibliographically approved