Details

For the option "two unknowns," a binary mixture is fed to a distillation column. Two of the six variables (, and are the feed, distillate and bottoms flow rates (kmol/h), and , and are the feed, distillate and bottoms mass fractions of component 1) are unknown, and their values are obtained from these mass balances:

,

.

For the option "two feeds," a binary mixture is fed to a distillation column in two streams ( and are the two-feed flow rates, and and are the two-feed mole fractions for component 1), and the two unknowns are obtained from the mass balances:

,

.

For the option "three unknowns," a ternary mixture is fed to a distillation column in one feed stream. The mass fractions of components 1 and 2 are either given or to be solved for. The three unknowns are obtained from these mass balances:

,

,

.