Abstract
A rigorous method, as characterized below, is proposed to solve the design problem of doublet separation of the multicomponent distillation process.
1) A new plate-to-plate method is used by considering both the Murphree plate efficiency and variable molar rates of vapor and liquid in each section of the column.
2) For the determination of optimum feed plate the same manner as in Murdoch and Holland's method is used.
3) By considering an extremely small molar rate of nondistributed component in distil- late and bottoms within an allowable significant figure of the computer used, the condition of platematching is provided accurately for all components.
The superiority of the proposed method compared to the modified Waterman's method is demonstrated by numerical examples of the quaternary doublet separation of nC8-nC7-nC6-nC5 system.
