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Kinetic model for binary homogeneous nucleation in the system: Comparison with experiments and classical theory of nucleation
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10.1063/1.2141511
/content/aip/journal/jcp/123/24/10.1063/1.2141511
http://aip.metastore.ingenta.com/content/aip/journal/jcp/123/24/10.1063/1.2141511
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Figures

Image of FIG. 1.
FIG. 1.

(a) Total gaseous sulfuric acid concentrations required to obtain a nucleation rate vs the relative humidity (RH) for . The experimental measurements are those of (▴) Boulaud et al. (1977) in a reaction tank; (●) Ball et al. (Ref. 28) in a flow reactor at . The solid curve is our model result at , the two dashed curves correspond to the predictions of Kulmala et al. (Ref. 25) (upper curve) and of Vehkamäki et al. (Ref. 26) (lower curve) for . (b) Same as in (a), but for . (∎) Mirabel and Clavelin (1974) in a thermal diffusion cloud chamber; (◆) Wyslouzil et al. (1991) in a flow mixing chamber; (●) Viisanen et al. (1997) in a flow chamber. The solid curve is our model result at , the two dashed curves correspond to the predictions of Kulmala et al. (Ref. 25) (upper curve) and of Vehkamäki et al. (Ref. 26) (lower curve) for .

Image of FIG. 2.
FIG. 2.

(a) Measured [Ball et al. (Ref. 28)] and simulated (this work) evolution of the concentration of nucleated particles in the flow reactor, vs the axial distance from the inlet, for . (∎) Measurement with an assumed acid concentration in the nucleation zone. The curves calculated with (dashed lines) correspond to two cut-off sizes: (upper curve) and (lower curve). (◻) Measurement with an assumed acid concentration in the nucleation zone. The curves are calculated with with the same cut-off sizes. (b) Same as (a) for . (▴) Measurement with an assumed acid concentration in the nucleation zone. The curves calculated with correspond to two cut-off sizes: (upper curve) and (lower curve).

Image of FIG. 3.
FIG. 3.

Comparison between the simulated rates and the measurements of Eisele and Hanson (Ref. 29) in a flow tube (squares) for and . According to Eisele and Hanson the measured nucleation rate is “a few times .” Three model curves are shown. and correspond to simulation when the total concentration of acid molecules is known. includes all collisions between molecules, hydrates, and clusters while includes only hydrate-cluster collisions. corresponds to the case when the concentration of acid hydrates (instead of the total number ) is kept constant.

Image of FIG. 4.
FIG. 4.

Influence of the choice of [see Eq. (8)] on the nucleation rate for , and a total number of acid molecules . Also shown in this figure is the steady-state value of the nucleation rate (Ref. 9) calculated according to Eq. (10).

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/content/aip/journal/jcp/123/24/10.1063/1.2141511
2005-12-29
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Kinetic model for binary homogeneous nucleation in the H2O–H2SO4 system: Comparison with experiments and classical theory of nucleation
http://aip.metastore.ingenta.com/content/aip/journal/jcp/123/24/10.1063/1.2141511
10.1063/1.2141511
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