Separation Process Essentials is a brand new book from CRC Press and a bit unusual. I've limited the content to be more appropriate for a first course on the topic. However, I am always finding additional topics that I plan to add in future editions. Your ideas are most welcome!
1. Polynomial fitting of non-ideal VLE. I showed this for LLE in the chapters on solvent extraction as an alternative to the extremely cumbersome NRTL or UNIFAQ models for activity coefficients. For distillation, I use Wilson activity coefficients and the modified Raoult's law to describe VLE for ethanol/water. It was only after finishing the book that I realized the polynomial fit also worked for VLE, eliminating the need for activity coefficients and actually making the calculations simpler. I have included this technique in some of the problems so that non-ideal VLE can be used in the early chapters instead of always relying on ideal solutions. See my tutorial "Fitting VLE Data". I plan to include such an example early on.
2. More examples using Henry's Law in the absorption/stripping chapters. The examples in the book stick with the ethanol/water/air system, with the assumption that water and air do not transfer between phases. So only ethanol VLE is considered, which is described by the modified Raoult's Law using the Wilson equation for activity coefficients. In Chapter 15, I do look at both water and air equilibrium, using Henry's Law for the air. However, I'd like to use examples for the carbonation of water with carbon dioxide and the stripping of pollutants like chloroform from water. Some Henry's Law data is in the form of solubility (grams of chemical per 100 grams of solvent) and I can explain how that works.
1. Polynomial fitting of non-ideal VLE. I showed this for LLE in the chapters on solvent extraction as an alternative to the extremely cumbersome NRTL or UNIFAQ models for activity coefficients. For distillation, I use Wilson activity coefficients and the modified Raoult's law to describe VLE for ethanol/water. It was only after finishing the book that I realized the polynomial fit also worked for VLE, eliminating the need for activity coefficients and actually making the calculations simpler. I have included this technique in some of the problems so that non-ideal VLE can be used in the early chapters instead of always relying on ideal solutions. See my tutorial "Fitting VLE Data". I plan to include such an example early on.
2. More examples using Henry's Law in the absorption/stripping chapters. The examples in the book stick with the ethanol/water/air system, with the assumption that water and air do not transfer between phases. So only ethanol VLE is considered, which is described by the modified Raoult's Law using the Wilson equation for activity coefficients. In Chapter 15, I do look at both water and air equilibrium, using Henry's Law for the air. However, I'd like to use examples for the carbonation of water with carbon dioxide and the stripping of pollutants like chloroform from water. Some Henry's Law data is in the form of solubility (grams of chemical per 100 grams of solvent) and I can explain how that works.
