Steady state distillation calculations: An investigation of computer techniques and an examination of results
Shearer, Luther T., Jr
Doctor of Philosophy
This work has been divided into two parts. The first is concerned with methods of computation suitable for use with digital computers for distillation problems with one feed and two product streams. Two methods were investigated (although others have been employed and reported by many authors): The Lewis-Matheson method and a modified Thiele-Geddes method. These techniques differ in that one requires floating-point arithmetic, while the other does not. A comparison has been made illustrating the merits and faults of both methods. The second section presents the results of a number of computations. A correlating method suggested recently by Geddes was investigated, as well as the more familiar ones of Gilliland and Brown & Martin. An empirical correlation was developed after the suggestion of Geddes for the range 0.5⩽LV⩽1.0, 0<DF⩽0.5 . Further, the effect of both the number of plates and the reflux ratio has been examined.