Complex Distillation Column Optimal complex column configuration is estimated to harness energy savings up to 70% Difference Point Equation Model Ternary System Examples Conclusion
Complex Distillation Column This complex column has two feed streams and three product streams Constant molar overflow is assumed in all sections of the column Constant volatility Isobaric process
Difference point equation The compositions and flow rates at the top of the section are know Doing a mass balance: Expressing the x n composition in terms of x n+1, by expanding it as a first order Taylor series
Difference Point Equation Rearranging the mass balance, and defining The difference point equation is:
Conclusion What we know: Ternary system i =k, Underwood, Ideal, Non-Ideal Single columns complex columns Quaternary system i =k, Underwood Single columns Single complex column What we dont know: Quaternary systems DOF 3c DOF 4c Ideal, Non-Ideal Single columns complex columns Partial condenser q 1 q 2, and q j 1 or 0
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