《活性炭吸附汞》PPT课件

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1、MercuryAdsorptionbyActivatedCarboninfluegasNewstandardinChinaGB13223-2011fluegasHg:0.03mg/m32015coal-firedpowerplantActivatedCarbonFeasibleReliablePhysicalAdsorption&ChemicalAdsorptionPhysicaladsorptionPorousStructureLargeSurfaceAreaAdsorptionofImpurities(MolecularSize

2、:LowerTemperature,highermercuryadsorptionPhysicalAdsorption&ChemicalAdsorptionChemicaladsorptionOxygen-containing:-COOH;COO-;Phenol;Carbonyl,etal.SurfaceOxygen:HgonthesurfaceofactivatedcarbonisalwaystogetherwithOxygen.(X-rayabsorptionfinestructurespectroscopy)ActiveSitesPhysicalAdsorptio

3、n&ChemicalAdsorptionChemicaladsorptionclosedboxenvironment:O2+Hg0=noreactionO2strengthensactivatedcarbonadsorptionat100-300℃.BjornHallPhysicalAdsorption&ChemicalAdsorptionFrankE.HugginsaChemicaladsorptionAdsorptionformofHg0test(XAFS&XANEs)AllHg2+NoHg0Sorbentsurface:I,S,Cl,O,etal.Acidgasi

4、nfluegasPhysicalAdsorption&ChemicalAdsorptionStanleyChemicaladsorptionBasicatmosphere:O2,CO2,N2andwaterat107℃SO2/HCl/NO/NO2appearaloneAdsorptionefficiencyincreasedto90-100%HClandNO/SO2andNO2Adsorptionefficiencyreducedrapidly.PhysicalAdsorption&ChemicalAdsorption胡长兴HuChangxinChemicaladsor

5、ptionN2CO2→O2→SO2→NO2→NO→HCl→H2OHg2+Hg0PhysicalAdsorption&ChemicalAdsorption胡长兴HuChangxinChemicaladsorptionTreatedactivatedcarbon863m2/g√0.23mg/gUntreatedactivatedcarbon53m2/g1.85mg/g√Whichoneisthedominant?Mercede,etalOxygenGroupismoreimportantUnderatmosphericpressure:Physicaladsorptio

6、nChemicaladsorptionLowtemperature(75℃):physicaladsorptionHightemperature(140℃):chemicaladsorptionWhichoneisthedominant?KrishnanSV&KwonSco-existChemicalModificationSang-SupLee,etal2009Brominatedactivatedcarbon(Br;DARCOHg-LH)Cupricchloride-impregnatedactivatedcarbon(CuCl;C-AC)ChemicalModif

7、icationSang-SupLee,etal2009ChemicalModificationSang-SupLee,etal2009Thankyouforyourattention!