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首页> 外文期刊>The Journal of Chemical Physics >Kinetic model for binary homogeneous nucleation in the H2O-H2SO4 system: Comparison with experiments and classical theory of nucleation
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Kinetic model for binary homogeneous nucleation in the H2O-H2SO4 system: Comparison with experiments and classical theory of nucleation

机译：H2O-H2SO4系统中二元均相成核的动力学模型：与实验和经典成核理论的比较

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摘要

A kinetic model to predict nucleation rates in the sulfuric acid-water system is presented. It allows calculating steady-state nucleation rates and the corresponding time lag, using a direct solution of a system of kinetic equations that describe the populations of sub- and near-critical clusters. This kinetic model takes into account cluster-cluster collisions and decay of clusters into smaller clusters. The model results are compared with some predictions obtained with the classical nucleation theory (CNT) and also with available measurement data obtained in smog chambers or flow tubes. It is shown that in the case of slow nucleation processes, the kinetic model and the CNT as used by Shugard [J. Chem. Phys. 75, 5298 (1974)] give the same results. However, in the case of intensive nucleation, a large part of the nucleation flux is due to cluster-cluster collisions and the CNT underestimates the nucleation rates. (c) 2005 American Institute of Physics.
机译：建立了预测硫酸-水系统中成核速率的动力学模型。它可以使用动力学方程组的直接解来计算稳态成核速率和相应的时滞，该动力学方程组描述了亚临界和近临界簇的总体。该动力学模型考虑了群集-群集碰撞和群集衰减成较小的群集。将模型结果与通过经典成核理论（CNT）获得的一些预测结果以及在烟雾室或流量管中获得的可用测量数据进行比较。结果表明，在缓慢成核过程中，动力学模型和CNT被Shugard使用[J。化学物理75，5298（1974）]给出了相同的结果。但是，在强烈成核的情况下，很大一部分成核通量是由于簇-簇碰撞而导致的，而CNT低估了成核速率。 （c）2005年美国物理研究所。

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