Title of article
EffectoftemperatureongraphiteoxidationbehaviorOriginalResearchArticle
Author/Authors
LuoXiaowei، نويسنده , , RobinJean-Charles، نويسنده , , YuSuyuan، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2004
Pages
8
From page
273
To page
280
Abstract
ThetemperaturedependenceofoxidationbehaviorforthegraphiteIG-11,usedintheHTR-10,wasinvestigatedbythermogravimetricanalysisinthetemperaturerangeof400–1200°C.Theoxidantwasdryair(watercontent<2ppm)withaflowrateof20ml/min.Theoxidationtimewas4h.Theoxidationresultsexhibitedthreeregimes:inthe400–600°Crange,theactivationenergywas158.56kJ/molandoxidationwascontrolledbychemicalreaction;inthe600–800°Crange,theactivationenergywas72.01kJ/molandoxidationkineticswerecontrolledbyin-porediffusion;whenthetemperaturewasover800°C,theactivationenergywasverylowandoxidationwascontrolledbytheboundarylayer.DuetoCOproduction,theoxidationrateincreasedathightemperatures.Theeffectofburn-offonactivationenergywasalsoinvestigated.Inthe600–800°Crange,theactivationenergydecreasedwithburn-off.Resultsoflowtemperaturetestswereverydispersiblebecausetheoxidationbehavioratlowtemperaturesissensitivetoinhomogeneousdistributionofanyimpurity,andsomeimpuritiescancatalysegraphiteoxidation.
Keywords
Nucleargraphite , Oxidation , HTR-10 , Thermogravimetricanalysis
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2004
Journal title
Nuclear Engineering and Design Eslah
Record number
894657
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