Reducing Energy Consumption in Propylene-Propane Separation with Heat Coupled Distillation

Lan Yi  Sun; Jun Li; Xue Nuan Liu; Qing Song Li

doi:10.4028/www.scientific.net/AMR.225-226.500

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 225-226Reducing Energy Consumption in Propylene-Propane...

Reducing Energy Consumption in Propylene-Propane Separation with Heat Coupled Distillation

Abstract:

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.