Input-output information for the column sequencing phase

Design specifications Design/operational variables Domain knowledge 

Process - mode of operation Discrete - operational skill - type of task - component balances (separation and/or reactive) - number of columns - columns connectivity Continuous - feed ratio of reactant streams 

The RCM technique has been considered a powerful tool for the flowsheet development and preliminary design of conventional multicomponent, nonideal separation processes (Fien and Liu, 1994). It represents a good approximation to actual equilibrium behavior and allows the designer to perform feasibility analysis of separation processes where nonideal and azeotropic mixtures are involved. Traditionally, nonreactive residue curves have been used to predict the liquid-composition trajectories in continuous distillation 

Analytically, ROMs are constructed based on physical properties of the system (ie. VL equilibrium, LL equilibrium and solubility data), wherein the composition of a nonreacting liquid remaining in the system (figure 5.1) may be determined by performing an overall and component material balances in the system (Westerberg et al., 2000), 

Combining the previous n-l ] independent expressions 5.3 with and appropriate vapor-hquid equilibrium model enables to define the set of simultaneous equations that describe the residue curves, dxi 

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Table 5.2. Input-output information for the column sequencing phase. The multiechelon approach is explained in section 4.5.

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