On the Equations of Holland in the Solution of Problems in Multicomponent Distillation

Holland developed certain equations to be used to accelerate or induce convergence in multicomponent distillation calculations. In practice this procedure has been the most successful of any adjunct to the basic Thiele-Geddes or Lewis-Matheson procedure for solving these problems. It is of importance, therefore, to ascertain the conditions under which the Holland equations can be guaranteed to possess the required type of solution at each iteration. The types of specifications which fulfill these conditions are determined.