| نویسندگان | زهره فتاح ,مهران رضائی,ابوالفضل بیابانی,عبداله ایران خواه |
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| نشریه | PROCESS SAF ENVIRON |
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| شماره صفحات | 948 |
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| شماره مجلد | 9 |
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| ضریب تاثیر (IF) | 6.158 |
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| نوع مقاله | Full Paper |
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| تاریخ انتشار | 2635-05-11 |
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| رتبه نشریه | علمی - پژوهشی |
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| نوع نشریه | الکترونیکی |
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| کشور محل چاپ | ایران |
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| نمایه نشریه | ISI ,SCOPUS |
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| کلید واژه ها | Magnesium; Cobalt; Nano particles;Experimental design; CO oxidation |
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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.
