Homogeneous nucleation rates of 1-pentanol.
Homogeneous nucleation rates of 1-pentanol.
复制标题
1-戊醇的均匀成核速率。
作者：
Kristina Iland;J. Wedekind;J. Wölk;P. Wagner;R. Strey
我们用双阀形核脉冲室测量了1-戊醇蒸汽在氩气和氦气两种不同载气中的等温均匀形核速率J。在235<T/K<265之间的温度下，成核速率覆盖10（5）<J/cm（-3）s（-1）<10（9）的范围。我们没有观察到载气的位置和成核速率等温线的斜率的影响。这些测量是1995年在布拉格发起的一项国际努力的一部分，该努力使用各种实验技术来检查1-戊醇。在本文件中的成核速率数据得到的几个群体进行了比较，彼此和经典的成核理论。正如预期的那样，经典理论不能定量地预测实验结果。然而，与经典理论的实验数据提供了一个合适的方法来比较不同的实验技术获得的广泛不同的成核速率的数据。这种比较有助于判断数据的相互支持，同时，也提供了一个相当有趣的见解，以了解各个实验技术的准确性。
We have measured isothermal homogeneous nucleation rates J for 1-pentanol vapor in two different carrier-gases, argon, and helium, using a two-valve nucleation pulse chamber. The nucleation rates cover a range of 10(5)<J/cm(-3) s(-1)<10(9) at temperatures between 235<T/K<265. We observed no influence of the carrier gas on location and slope of the nucleation rate isotherms. These measurements are part of an international effort to examine 1-pentanol using various experimental techniques, which was initiated in Prague in 1995. In the present paper nucleation rate data obtained by several groups are compared to each other and to the classical nucleation theory. As expected, the classical theory is not able to quantitatively predict the experimental results. Nevertheless, relating the experimental data to the classical theory provides a suitable way to compare data of widely differing nucleation rates obtained by different experimental techniques. This comparison helps judging mutual support of the data and, at the same time, provides a rather interesting insight into the accuracy of the individual experimental techniques.