Methane partial oxidation and methane decomposition over Ni andNi-Ru supported catalysts for synthesis gas production
(English)Manuscript (preprint) (Other academic)
Nickel and nickel-ruthenium based catalysts were compared in the catalytic partial oxidation (CPO) of methane and in the equilibrium of the methane decomposition reaction. A hydrotalcite-derived material as well as α- Al2O3 and γ-Al2O3 were used as catalyst supports. The catalysts were characterized by H2 chemisorption, N2 physisorption, temperature-programmed reduction (TPR), temperature-programmed oxidation (TPO) and transmission electron microscopy (TEM). Catalyst properties and composition influenced the catalytic performance during partial oxidation (i.e. activity and temperature profiles). During methane decomposition equilibrium tests, all catalysts presented smaller equilibrium constants than those calculated on the basis of graphite; the deviation from graphite data was mainly associated with maximum nickel particle size (for both Ni and bimetallic Ni-Ru supported catalysts). Among all catalysts, the bimetallic Ni-Ru catalyst supported on hydrotalcite-derived material showed an interesting enhanced behavior; however, resistance towards catalyst deactivation, by mechanisms different than carbon formation, still needs to be improved.
carbon formation, methane decomposition, nickel, partial oxidation of methane, ruthenium, synthesis gas
Chemical Process Engineering
Research subject Chemical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-176409OAI: oai:DiVA.org:kth-176409DiVA: diva2:866800
QS 20152015-11-032015-11-032015-11-04Bibliographically approved