期刊
FLUID PHASE EQUILIBRIA
卷 236, 期 1-2, 页码 136-145出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fluid.2005.07.012
关键词
supercritical fluids; dye solubility; density-based correlations; Chrastil model
For the proper design of supercritical fluid dyeing process, it is essential to have a sound knowledge of the solubilities of dyes and the accurate solubility representation. In this work, we employed four semiempirical density-based models (the Chrastil model, the Bartle model, the K-J model and the M-T model) to correlate solubilities of 32 dyestuffs in supercritical carbon dioxide. The results show that these models perform very well with three temperature-independent parameters and could be applied for satisfactory solubility predictions. A comparison among the four models reveals that the In gamma 2 versus In rho Chrastil model gives much better correlations to the solubility data with an overall average absolute relative deviation (AARD) of 20.6% than the other three models. From the correlation results, the heat of dye-CO2 solvation and that of solute dye vaporization can be separately approximated in the range of 13.0-2 1.0 and 29.2-101.6 kJ/mol, respectively. Besides, the solubility discrepancies observed for certain dyestuffs have been discussed by using these density-based models. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据