Reactivity of surface and bulk oxygen in La1-xCaxFeO3-y system with respect to methane oxidation |
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Authors: | V.A. Sadykov L.A. Isupova I.S. Yakovleva G.M. Alikina A.I. Lukashevich S. Neophytides |
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Affiliation: | (1) Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia;(2) Institute of High Temperature, Russia |
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Abstract: | The reactivity and mobility of the surface and lattice oxygen in a La1-xCaxFeO3-y system prepared via a ceramic route were studied by using CH4-TPR. While the middle-temperature (400-700oC) oxygen lattice mobility reaches maximum for samples with disordered anion vacancies, the high-temperature lattice oxygen flux appears to be controlled by a rapid transfer along disordered domain walls. In the high-temperature range, a high selectivity to syngas of methane oxidation by the lattice oxygen was achieved both for pure lanthanum ferrite and for samples with a microdomain structure. This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | methane combustion selective oxidation into syngas CH4-TPR mobility and reactivity of the lattice oxygen |
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