Premium
On the numerical solution of problems in multicomponent distillation at the steady state II
Author(s) -
Billingsley D. S.
Publication year - 1970
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690160322
Subject(s) - convergence (economics) , distillation , mathematics , acceleration , flow (mathematics) , steady state (chemistry) , thermodynamics , chemistry , physics , chromatography , classical mechanics , geometry , economics , economic growth
A modification is presented of the K b method described by Holland. This modified procedure exhibits substantially improved convergence characteristics when compared with the unmodified procedure or with the classical bubble point approach. Further, it provides by far the fastest algorithm known to the author. A second procedure for determining stage temperatures is also given. In this method, flow equations as well as equilibrium relations are satisfied by the temperature profile at each iteration. Next, an improved scheme for handling nonideal mixtures is given. Finally, it is shown that a positive solution to the convergence acceleration equations of Holland may not exist when this procedure is applied to a purity specification.