%0 Journal Article
%T DeactivationandRegenerationofNickel-BasedCatalystsforSteam-MethaneReforming
%J ´ß»¯Ñ§±¨
%P 273-279
%D 2011
%R 10.1016/S1872-2067(10)60175-1
%X £¿ThedeactivationofnickelcatalystsusedinArakandRazipetrochemicalcomplexesfollowedbycatalystregenerationwasevaluated.ThecharacterizationofthedifferentstructureswasmadebypowderX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),energydispersiveX-rayspectroscopy(EDS),transmissionelectronmicroscopy(TEM),andcarbon&sulfuranalyzer.TheNiparticlesizewasestimatedfromXRDpatternsandTEMgraphs.TheagglomerationofnickelparticleandthepoisonbysulfurcomponentswererecognizedasthemainreasonsindeactivationofArakandRazicatalysts,respectively.TheactivityoftheusedcatalystsbeforeandafterregenerationwasmeasuredonmethanesteamreformingataCH-4:H2Oratioof1:3at850oC.TheregenerationprocessesforArakandRazisampleswereperformedwithCO2asanoxidativeatmosphereandsteamasaregeneratingagent,respectively.Theresultsshowthat,(1)noresidualsulfurcomponentswereontheregeneratedRazicatalystsurfacewithoutchangingthestructureofthecatalystandtheregeneratedcatalysthasgained80%ofitscatalyticactivity,andthat(2)thenickelparticlesizeofregeneratedArakspecimendecreasedremarkablyasmeasuredbyDebye-ScherrerequationfromXRDpatterns.TEMimageswereinagreementwiththeXRDresultsandindicatedadecreaseinnickelparticlesizeofregeneratedcatalyst.Additionally,inbothregeneratedcatalystsallthecokeonthesurfaceofthesupportwaseliminatedafterregeneration.
%K nickelcatalyst
%K steamreforming
%K deactivation
%K sintering
%K sulfurpoisoning
%K regeneration
%U http://www.chxb.cn/CN/abstract/abstract20323.shtml