Abstract
The column targeting tools and exergy analysis are used to set energy targets and improve energy efficiency in the distillation column. The combination of process options like feed stage location, reflux ratio, feed conditioning, side-reboiler and side-condenser greatly improves thermodynamic efficiency and reduces exergy loss throughout the column. The converged base-case simulation for propane-propylene binary mixture obtained from Aspen Plus was evaluated with both column targeting tools and exergy loss analysis. The study reveals significant decrease in reboiler (∼29%) and condenser (∼15%) duties, and increase in thermodynamic efficiency by ∼33% as compared to base-case design by reduction in total exergy losses.
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