The effect of middle components purity in quaternary mixture separation using distillation system

الملخص

Separation processes play critical roles in industry, including the removal of impurities from raw materials and the overall separation processes accounts for 40-70% of both capital and operating costs in industry. The main objective of this study was exploration of design and economic features of conventional distillation schemes for separation of quaternary mixture (Propane, i-Butane, n-Butane, i- Pentane) with high products separation of 95%, 90%, 90%, and 95%, respectively for the equimolar feed composition. The studied distillation schemes are: the effect of middle components purity (i-C4 and n- C4) is also on energy and capital investments, conventional distillation scheme, The middle components purity was changed from 90% to85%and 80 %.The results of economic study show conventional Distillation cases studied at different composition of middle components purity at (0.9, 0.85and 0.8) and we get highest saving on the case of 80% side stream composition with 19 %saving in energy and 17%saving in TAC, and the saving on case of 85% side stream composition with 12% saving in energy and 11 % saving in TAC, compared with case of 90%middle component purity.