10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Characterization of the Boosted 3776 Butanol TSI CPC in the Sub 2 nm Range. Activation of Sub 2nm Particles with Butanol
MICHEL ATTOUI, LISA Paris Est Creteil University France
Abstract Number: 714 Working Group: Instrumentation
Abstract Boosted butanol laminar sheathed condensers CPCs have (Kuang2012) demonstrated their ability to detect sub 3 nm with acceptable detection efficiency although lower than mixing cpc with di ethylene glycol as working fluid. In the other hand Kangasluoma et al. 2015 have showed than unsheathed condensers butanol CPCs are able to detect particles down to 1 nm. So if unsheathed condenser can detect particles of 1 nm why not the sheathed condenser CPC design? The abilities of this CPC in terms of flowrates control (sheath and capillary) are used to study the activation (or no activation) of THABr and TBABr monomer by lowering the aerosol losses in the capillary and working at the limit or threshold of the homogeneous nucleation.The presentation gives the effect of the flowrate in the capillary on the detection efficiency for different temperatures difference DTs between the saturator and condenser until the limit of the homogeneous nucleation. The figures 1 and 2 below give the inverse mobility spectra of TBABr (tetrabutylammonium bromide) with flowrates of 50 cc/min 70 cc/min in the capillary at the limit of the homogeneous nucleation and respectively in the condenser. The figures 3 and 4 give the results with THABr (tetraheptylammonium bromide) in the same with 50 et 70 cc/min aerosol flowrate in the capillary at the limit of the homogeneous nucleation always.