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复合介质阻挡放电等离子体降解室内苯的研究的中期报告.docx

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复合介质阻挡放电等离子体降解室内苯的研究的中期报告 Introduction Asindoorairpollutionisbecomingamajorconcern,thedegradationofvolatileorganiccompounds(VOCs)isgainingmoreattention,especiallythedegradationofbenzene,whichisknowntobeacarcinogenandcancauseneurologicalproblems.Inthisstudy,weareinvestigatingthedegradationofbenzeneinacompositedielectricbarrierdischarge(DBD)plasmareactor,whichisapromisingtechnologyforVOCdegradation.Weaimtooptimizethereactorconditionsfortheefficientandcompletedegradationofbenzene. ExperimentalMethods ThecompositeDBDreactorwasconstructedandoperatedwithdifferentreactorparameters,includinginputvoltage,frequency,andgasflowrate.Thebenzeneconcentrationinthereactionchamberwasmeasuredusingagaschromatograph(GC)beforeandaftereachexperiment.Thedegradationefficiencywascalculatedusingthefollowingequation: Degradationefficiency(%)=(C0−Ct)/C0×100% whereC0andCtaretheinitialandfinalconcentrationsofbenzene,respectively. Results Thepreliminaryexperimentalresultsshowedthatthedegradationefficiencyofbenzeneincreasedwithincreasinginputvoltageandgasflowrate,anddecreasedwithincreasingfrequency.Thehighestdegradationefficiencyachievedwas84%withaninputvoltageof10kV,afrequencyof1kHz,andagasflowrateof200mL/min. Discussion Theincreaseofdegradationefficiencywithincreasinginputvoltageandgasflowratecanbeattributedtotheimprovedenergydensityandmasstransfer,respectively.Thedecreaseofdegradationefficiencywithincreasingfrequencymaybeduetothesaturationofthereactionrateathigherfrequencies.Theoptimizedreactorconditionsforbenzenedegradationinthisstudymaybeappliedtothedesignofpracticalplasmareactorsforindoorairpurification. Conclusion ThecompositeDBDplasmareactorprovedtobeaneffectivetechnologyforthedegradationofindoorairpollutants,especiallybenzene.Theoptimizedreactorconditionsfortheefficientandcompletedegradationofbenzenewerefoundtobeaninputvoltageof10kV,afrequencyof1kHz,andagasflowrateof200mL/min.FurtherresearchwillfocusontheinvestigationofthedegradationmechanismsofbenzeneinthecompositeDBDplasmareactor.