| نویسندگان | زهره فتاح -مهران رضائی-ابوالفضل بیابانی راوندی -عبداله ایران خواه |
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| نشریه | PROCESS SAF ENVIRON |
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| تاریخ انتشار | 2635-5-01 |
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| نمایه نشریه | ISI ,SCOPUS |
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چکیده مقاله
In thisstudy,aseriesofCo–MgOmixedoxides(30wt.%Co)werepreparedbyco-precipitationmethodandemployed
as catalystinlowtemperatureCOoxidationreaction.ThepreparationconditionswereoptimizedbytheTaguchi
method ofexperimentaldesigntosynthesizeasamplewithhighcatalyticperformancetowardCOoxidationreac-
tion. Theeffectsoffourvariables,pHofsolution,agingtemperature,agingtimeandmolarityofprecursorsolution
at threelevelswereinvestigated.TheoptimizedsamplewascharacterizedbyX-raydiffraction(XRD),temperature
programmedreduction(TPR),temperatureprogrammeddesorptionofoxygen(O2-TPD), N2 adsorption/desorption,
thermal gravimetricanddifferentialthermalanalysis(TGA/DTA),andtransmissionelectronmicroscopy(TEM)tech-
niques. Theresultsrevealedthattheoptimizedsampleshowedamesoporousstructurewithanarrowporesize
distribution centeredintherangeof7–17nmandparticlesizeabout5.5nm.Itwasfoundthatthemolarityofsolu-
tion andagingtimehadthemostinfluenceontheCOconversion,respectively.Thecatalyticresultsshowedthat
the highestCOconversionobtainedfromsamplessynthesizedbyTaguchiorthogonalarraywasabout90%at200 ◦C,
while theCOconversionforoptimizedsamplewas95%.Inaddition,theeffectofoperationalconditionswasstudied
overoptimizedsample.
