Reducing Energy Consumption in Propylene-Propane Separation with Heat Coupled Distillation
The heat coupled distillation column which applies the principle of internal heat integration between the rectifying section and the stripping section of a distillation column by increasing the temperature of the rectifying section with a compressor attracts extensive attention worldwide for its high thermodynamic efficiency. In this study, the economic features of a heat coupled distillation column (HCDC) are investigated and compared to a conventional column and a commercial column with vapor recompression system (VRC) for the separation of propylene-propane mixture. The economic analysis indicates that HCDC has 10 – 20 % total annual cost (TAC) saving associated with VRC, which appeared to be strongly sensitive to the pressure ratio.
Helen Zhang, Gang Shen and David Jin
L. Y. Sun et al., "Reducing Energy Consumption in Propylene-Propane Separation with Heat Coupled Distillation", Advanced Materials Research, Vols. 225-226, pp. 500-503, 2011