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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Self-cleaningperovskitetypecatalystsforthedryreformingofmethane
DOI: 10.1016/S1872-2067(14)60187-X, PP. 1337-1346
Keywords: Biogas,Reforming,Perovskite,Oxygenmobility,Dopant
Abstract:
？Gas-to-liquidprocessesaregenerallyusedtoconvertnaturalgasorothergaseoushydrocarbonsintoliquidfuelsviaanintermediatesyngasstream.Thisincludestheproductionofliquidfuelsfrombiomass-derivedsourcessuchasbiogas.Forexample,thedryreformingofmethaneisdonebyreactingCH4andCO2,thetwomaincomponentsofnaturalbiogas,intomorevaluableproducts,i.e.,COandH2.Nickelcontainingperovskitetypecatalystscanpromotethisreaction,yieldinggoodconversionsandselectivities;however,theyarepronetocokelaydownundercertainoperatingconditions.WeinvestigatedtheadditionofhighoxygenmobilitydopantssuchasCeO2,ZrO2,orYSZtoreducecarbonlaydown,particularlyusingreactionconditionsthatnormallyresultinrapidcoking.WhiledopingwithYSZ,YDC,GDC,andSDCdidnotresultinanyimprovement,weshowthataNiperovskitecatalyst(Na0.5La0.5Ni0.3Al0.7O2.5)dopedwith80.9ZrO215.2CeO2gavethelowestamountofcarbonformationat800℃andactivitywasmaintainedovertheoperatingtime.
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