Methane oxidation over Fe-, Co-, Ni- and V-containing mixed conductors

摘要: Abstract The catalytic oxidation of methane over mixed conducting ceramics, including perovskite-type SrFe 0.7 Al 0.3 O 3− δ and La Sr Co 0.8 Ga 0.2 , dual-phase composite (SrCo) 0.5 (Sr 2 Fe 3 ) 4.75± Ni 0.9 0.1 4+ with K NiF 4 -type structure zircon-type CeVO is primarily governed by bonding energy between oxygen transition metal cations, which leads to general correlations the activity, desorption, ionic transport, thermal expansion, and, often, phase stability. steady-state conversion dry CH either permeating through dense oxide ceramics in a membrane reactor or atmospheric (methane/air ratio 30:70) fixed bed material as catalyst results high CO selectivity, increasing when permeability conductors increases. prevailing mechanism total combustion makes it necessary incorporate reforming catalysts reactors for natural gas Synthesis (syngas). Dominant formation also observed pulses supplied helium flow conductor powders, except yielding synthesis H /CO close 2, characteristic partial process. For model comprising one disk-shaped both made selectivity at 1223 achieved 65% 48%, respectively.