This dissertation is divided into four parts consisting of (1) an introduction to stagewise processes; (2) a summary of investigations appearing in the literature; (3) the detailed application of finite calculus to the stagewise operations of extraction, gas absorption and fractionation; and (4) an appendix containing the elements of the finite calculus and a few numerical solutions of problems presented in part (3).
Theoretical and experimental contributions to the study of the behavior of beds of granular desiccants in removing moisture from a flowing gas stream are presented. A differential equation for the performance of such a bed is developed under various limiting assumptions regarding the mechanism of the process. Rigorous and approximate solutions to the equation, together with a method of testing experimental data for conformity to it, are developed. Critical analysis of previous contributions to this theory is undertaken.