A comparison between hexaaluminates and perovskites for catalytic combustion applications
2006 (English)In: Catalysis Today, ISSN 0920-5861, E-ISSN 1873-4308, Vol. 112, no 04-jan, 157-160 p.Article in journal (Refereed) Published
Hexaaluminates and perovskites are two promising candidates for use in catalytic combustion applications. In the present study two hexaaluminates, LaMnAl11O19 and LaCoAl11O19, were compared with two perovskites, LaMnO3 and LaCoO3, with respect to their thermal stability and catalytic activity for combustion of methane and gasified biomass. The results showed that the hexaaluminates retained a much higher surface area even after calcination at 1200 degrees C compared to the perovskites. LaMnAl11O19 showed the highest catalytic activity of all catalysts. LaCoAl11O19 generally showed low activity. Of the two perovskites, LaCoO3 was the most active, and the initial test run the activity for biomass combustion were close to that one of LaMnAl11O19 even though its surface area was only one tenth of the hexaaluminate's. However, it was severely deactivated in the second test run. Similar deactivation but less severe was also found for the other catalyst.
Place, publisher, year, edition, pages
2006. Vol. 112, no 04-jan, 157-160 p.
hexaaluminate, perovskite, cobalt, manganese, catalytic combustion, gasified biomass, methane, stability, supports, surface, methane, oxides
IdentifiersURN: urn:nbn:se:kth:diva-15499DOI: 10.1016/j.cattod.2005.11.024ISI: 000235859000036ScopusID: 2-s2.0-32544457998OAI: oai:DiVA.org:kth-15499DiVA: diva2:333540
QC 20100525 QC 20111003. Conference: 1st Conference of the European-Union-Coordination-Action -Coordination of Nanostructured Catalytic Oxides Research and Development in Europe. Louvain la Neuve, BELGIUM. JAN 26-28, 20052010-08-052010-08-052011-10-03Bibliographically approved