Semiempirical correlation for Henry's constants over large temperature ranges
Semiempirical correlation for Henry's constants over large temperature ranges
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DOI：
10.1002/aic.690420531
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发表时间：
1996-05-01
期刊：
影响因子：
3.7
通讯作者：
Harvey, AH
中科院分区：
文献类型：
--
作者：
Harvey, AH
亨利定律通常用于描述气体在低和中等分压下在液体中的溶解度。对于溶质-溶剂对，亨利常数通常随温度增加，通过最大值，然后在较高温度下下降。当接近溶剂的临界温度时，亨利常数保持有限，但其相对于温度的导数发散（Beutier和Renon，1978; Japas和Levelt Sunday，1989）。在以前的工作中（Harvey和Levelt Sunday，1990年），作者利用Japas和Levelt Sunday（1989年）推导的亨利常数在溶剂临界点附近渐近变化的线性关系，构建了水溶液亨利常数的半经验关联式。相关性的形式是其中k是溶质2在溶剂1中的亨利常数，定义为
Henry’s law is commonly used to describe the solubility of gases in liquids at low and moderate partial pressures. For a solute-solvent pair, Henry’s constant typically increases with temperature, passes through a maximum, and then declines at higher temperatures. As the critical temperature of the solvent is approached, Henry’s constant remains finite but its derivative with respect to temperature diverges (Beutier and Renon, 1978; Japas and Levelt Sengers, 1989). In previous work (Harvey and Levelt Sengers, 1990) the authors took advantage of a linear relationship derived by Japas and Levelt Sengers (1989) for the asymptotic variation of Henry’s constant near the solvent’s critical point to construct a semiempirical correlation for aqueous Henry’s constants. The form of the correlation was where k, is the Henry’s constant of solute 2 in solvent 1, defined by