简介：Toexploretheeffectofthegassourceflowrateontheactualdieselexhaustparticulatematter(PM),atestbenchfordieselengineexhaustpurificationwasconstructed,usingindirectnonthermalplasmatechnology.Theeffectsofdifferentgassourceflowratesonthequantityconcentration,composition,andapparentactivationenergyofPMwereinvestigated,usinganengineexhaustparticlesizerandathermo-gravimetricanalyzer.Theresultsshowthatwhenthegassourceflowratewaslarge,notonlythemaximumpeakquantityconcentrationsofparticleshadalargedrop,butalsothepeakquantityconcentrationsshiftedtosmallerparticlesizesfrom100nmto80nm.Whenthegassourceflowratewas10Lmin~(-1),thetotalquantityconcentrationgreatlydecreasedwheretheremovalrateofparticleswas79.2%,andthevariationofthedifferentmodeparticleproportionwasobvious.Non-thermalplasma(NTP)improvedtheoxidationabilityofvolatilematteraswellasthatofsolidcarbon.However,theNTPgassourceratehadlittleeffectsonoxidationactivityofvolatilematter,whileitstronglyinfluencedtheoxidationactivityofsolidcarbon.Consideringthequantityconcentrationandoxidationactivityofparticles,agassourceflowrateof10Lmin~(-1)wasmoreappropriateforthepurificationofparticles.

简介：Improvedperformanceofplasmainrawengineexhausttreatmentisreported.Anewtypeofreactorreferredtoasofcross-flowdielectricbarrierdischarge(DBD)wasused,inwhichthegasflowisperpendiculartothecoronaelectrode.Inrawexhaustenvironment,thecross-flow(radial-flow)reactorexhibitsasuperiorperformancewithregardtoNOxremovalwhencomparedtothatwithaxialflowofgas.Experimentswereconductedatdifferentflowratesrangingfrom2L/minto25L/min.TheplasmaassistedbarrierdischargereactorhasshownencouragingresultsinNO_xremovalathighflowrates.