| 摘要 |
A process for combustion of fuel in which oxygen-containing gas is mixed with a fuel to form a combustible mixture which is then contacted in a first zone with a first zone combustion catalyst comprising PdO disposed on a support at reaction conditions sufficient to combust a portion of the fuel and produce a first zone combustion catalyst temperature no greater than about 800 DEG C. The partially combusted fuel from the first zone is then contacted in a second zone with a second zone combustion catalyst. Supports for the first zone combustion catalyst include La2O3-stabilized gamma -Al2O3, La-stabilized gamma -Al2O3, Ce-stabilized gamma -Al2O3, Ba-stabilized gamma -Al2O3, and La203-11Al2O3 hexa-aluminate. Second zone combustion catalysts include La0.5Sr0.5MnAl11O19, PdO on La2O3-11Al2O3 hexa-aluminate, and La0.2Sr0.8MnAl11O19.
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