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过程工程学报 2007
AbsorptionofLowConcentrationSulfurDioxideUsingLiquid-containingMicroporousMembraneKeywords: hollowfiber,liquid-containingmembrane,citricacid,lowconcentrationSO2absorption,dynamicalcontactangle Abstract: TheabsorptionoflowconcentrationSO2influegasbyusingthemoduleofliquid-containingmicroporousmembranewhichismadeupofhollowfiberandcitricacid-sodiumcitratebuffersolutionwasinvestigated.Theabsorptionefficiencyofhydrophilicandhydrophobicmembranesbyusingtheconceptofdynamiccontactanglewasmainlystudied.Theinfluencesonabsorptionefficiencyfromabsorptiontime,flowrateofgasphase,SO2concentrationofgasphase,airpressure,citrateconcentration,pHvalueofsolutionaswellasthegenerationofsulfateradicalinabsorptionsolutionwereexamined.Theresultsindicatethatthehydrophobichollowfibermembraneisbetterthanhydrophilicmembrane,theabsorptionefficiencydecreaseswithincreasingabsorptiontime,gasphaseflowrate,gasphaseSO2concentrationandairpressure,theabsorptionrateandcapacityofSO2canbeimprovedbyincreasingthecitrateconcentration,theabsorptionefficiencycanbeimprovedbyincreasingthepHvalueofcitratesolution,theconcentrationofSO42-inabsorptionsolutionincreaseslinearlywiththeabsorptiontimeataratearound0.192g/(L×h).
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