%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