Abstract
Mn-substituted hexaaluminate compounds have been investigated as catalysts for high temperature combustion above 1000°C. In this study, changes of crystalline phase and catalytic properties of Sr1−xLnxMnAl11O19−α(Ln= Pr, Nd, Sm, Gd) were investigated. Two kinds of hexaaluminate phases existed as equilibrium phases in the unsubstituted sample, theLnions were preferentially soluble in one of these phases. Accompanied with the dissolution, unequilibrium LnAlO3phase was sometimes formed for highxsamples. The amount of this phase decreases with an increase in temperature and/or ionic radius ofLn. The surface area of the samples generally decreased with increasing extent ofLnsubstitution. Catalytic activity for methane combustion at low conversion level was improved by the substitution.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
