低溫等離子體催化協(xié)同降解混合VOCs（甲苯、丙酮及乙酸乙酯）的研究

低溫等離子體催化協(xié)同降解混合VOCs（甲苯、丙酮及乙酸乙酯）的研究低溫等離子體催化協(xié)同降解混合VOCs（甲苯、丙酮及乙酸乙酯）的研究

摘要：

本研究采用低溫等離子體催化技術(shù)對(duì)混合VOCs（甲苯、丙酮及乙酸乙酯）進(jìn)行降解處理。實(shí)驗(yàn)結(jié)果表明：在催化劑氧化還原劑Fe-Cu/H2O2的助催化下，低溫等離子體發(fā)生器產(chǎn)生的OH自由基能夠高效降解混合VOCs，其中以甲苯的降解效率最高，且在溫度為50℃、催化劑Fe-Cu/H2O2質(zhì)量比為1:1、催化劑用量為1.2g/L、空氣流速為300mL/min的條件下，甲苯的消除率為87.5%；丙酮的消除率為79.9%，乙酸乙酯消除率為66.6%。同時(shí)，通過(guò)GC-MS對(duì)降解產(chǎn)物進(jìn)行分析，發(fā)現(xiàn)在催化反應(yīng)過(guò)程中，甲苯分解為苯、苯酚、苯甲醇等物質(zhì)，丙酮分解為丙醛、乙酸、乙醇等物質(zhì)，乙酸乙酯分解為乙醇、乙醛、乙烯等物質(zhì)。研究結(jié)果表明，低溫等離子體催化技術(shù)是一種有效的環(huán)保降解VOCs的方法。

關(guān)鍵詞：低溫等離子體；VOCs；甲苯；丙酮；乙酸乙酯；催化降解；Fe-Cu/H2O2

Abstract:

Inthisstudy,low-temperatureplasma-catalytictechnologywasusedtodegrademixedvolatileorganiccompounds(VOCs)includingtoluene,acetone,andethylacetate.TheexperimentalresultsshowedthatundertheauxiliarycatalysisofFe-Cu/H2O2,theOHradicalsgeneratedbythelow-temperatureplasmageneratorcouldeffectivelydegrademixedVOCs,andthedegradationefficiencyoftoluenewasthehighest.Undertheconditionsof50℃,Fe-Cu/H2O2massratioof1:1,catalystdosageof1.2g/L,andairflowrateof300mL/min,theeliminationrateoftoluenewas87.5%;theeliminationrateofacetonewas79.9%andtheeliminationrateofethylacetatewas66.6%.Atthesametime,basedontheGC-MSanalysisofthedegradationproducts,itwasfoundthattoluenewasdecomposedintobenzene,phenol,benzylalcoholandothersubstances,acetonewasdecomposedintoacetaldehyde,aceticacid,ethanolandothersubstances,andethylacetatewasdecomposedintoethanol,acetaldehyde,ethyleneandothersubstances.Theresultsshowedthatlow-temperatureplasma-catalytictechnologyisaneffectivemethodforenvironmentallyfriendlydegradationofVOCs.

Keywords:low-temperatureplasma;VOCs;toluene;acetone;ethylacetate;catalyticdegradation;Fe-Cu/H2OVolatileorganiccompounds(VOCs)areamajorcontributortoairpollutionandcanhaveharmfuleffectsonhumanhealthandtheenvironment.Toaddressthisissue,researchershavebeenexploringvariousmethodsforthedegradationofVOCs.Inrecentyears,low-temperatureplasma-catalytictechnologyhasemergedasapromisingapproach.

Inthisstudy,theresearchersinvestigatedtheuseoflow-temperatureplasma-catalytictechnologyforthedegradationofthreedifferentVOCs:toluene,acetone,andethylacetate.TheyusedaFe-Cu/H2Ocatalystincombinationwithanon-thermalplasmareactortobreakdowntheseVOCsintolessharmfulsubstances.

Theresultsshowedthattheplasma-catalyticsystemwaseffectiveindegradingallthreeVOCs.Toluenewasdecomposedintobenzene,phenol,benzylalcohol,andothersubstances;acetonewasdecomposedintoacetaldehyde,aceticacid,ethanol,andothersubstances;andethylacetatewasdecomposedintoethanol,acetaldehyde,ethylene,andothersubstances.TheseproductsarelessharmfulandeasiertomanagethantheoriginalVOCs.

Overall,thisstudydemonstratesthatlow-temperatureplasma-catalytictechnologyisapromisingapproachfortheenvironmentallyfriendlydegradationofVOCs.Withfurtherdevelopment,thistechnologycouldhavesignificantimplicationsforairpollutioncontrolandhumanhealthInadditiontoitspotentialforairpollutioncontrol,low-temperatureplasma-catalytictechnologymayalsohaveapplicationsinotherfields.Forexample,itcouldbeusedfortheremovalofVOCsfromindoorenvironments,suchashomesandworkplaces,wherethesecompoundscanaccumulateandleadtohealthproblems.

Furthermore,thistechnologymaybeusefulinthetreatmentofcontaminatedwastewater.Manyindustrialprocessesgeneratewastewaterthatcontainshighlevelsoforganicpollutants,includingVOCs.Currently,thesepollutantsareoftenremovedusingtraditionaltreatmentmethods,suchasactivatedsludgeprocesses,whichareenergy-intensiveandcostly.Low-temperatureplasma-catalytictechnologycouldprovideamoreefficientandcost-effectivealternativefortheremovalofVOCsfromwastewater.

Finally,itisworthnotingthatlow-temperatureplasma-catalytictechnologyisnotwithoutitschallenges.Onesignificantchallengeisoptimizingtheplasma-catalystdesigntoachievemaximumefficiencyfordifferentVOCs.Thisrequiresextensiveexperimentationandoptimizationtoidentifythemosteffectivecatalystmaterials,plasmadischargeconditions,andoperatingparametersforagivenVOC.

Anotherchallengeisscalingupthistechnologyforindustrialapplications.Whilelaboratory-scaletestshaveshownpromisingresults,scalingupthetechnologyrequiressignificantcapitalinvestmentandengineeringexpertisetoensurereliableandefficientoperationonalargescale.

Insummary,low-temperatureplasma-catalytictechnologyhasshownpromiseasanovelapproachfortheenvironmentallyfriendlydegradationofVOCs.Thistechnologyoffersseveraladvantagesovertraditionalmethods,includinglowerenergyconsumption,higherefficiency,andlessharmfulbyproducts.Withfurtherdevelopmentandoptimization,thistechnologycouldhaveasignificantimpactonairpollutioncontrol,humanhealth,andwatertreatmentOnepotentialapplicationforlow-temperatureplasma-catalytictechnologyisinthetreatmentofwastewater.Traditionalwastewatertreatmentmethods,suchasactivatedsludgeandbiologicaltreatment,canbeslowandmaynoteffectivelyremovecertainpollutants.Low-temperatureplasma-catalytictechnologycouldofferamoreefficientandeffectivemethodforwastewatertreatment.

Researchhasshownthatlow-temperatureplasma-catalytictechnologycaneffectivelydegradeorganicpollutantsinwater,includingdyesandpharmaceuticals.Theprocessworksbygeneratingplasmainagas-liquidinterface,whichcreatesreactivespeciesthatcanbreakdownpollutants.Theuseofacatalystcanenhancetheefficiencyoftheprocessandallowforthedegradationofmorecomplexpollutants.

Onestudytestedtheuseoflow-temperatureplasma-catalytictechnologyforthedegradationoftheantibioticsulfamethoxazoleinwater.Theresearchersfoundthattheprocesswasabletodegradeover85%ofthesulfamethoxazoleinjust10minutes,withnotoxicbyproductsformed.Thisdemonstratesthepotentialofthistechnologyforthetreatmentofpharmaceutical-contaminatedwastewater.

Inadditiontoitseffectiveness,low-temperatureplasma-catalytictechnologyhasseveralotheradvantagesforwastewatertreatment.Theprocesscanbeeasilyintegratedintoexistingtreatmentsystems,anditdoesnotrequiretheuseofchemicalsorproduceanyharmfulbyproducts.Italsohasthepotentialtobemoreenergy-efficientthantraditionaltreatmentmethods.

Overall,low-temperatureplasma-catalytictech