Journal
JOURNAL OF THE JAPAN PETROLEUM INSTITUTE
Volume 62, Issue 2, Pages 80-86Publisher
JAPAN PETROLEUM INST
DOI: 10.1627/jpi.62.80
Keywords
Hybrid separation process; Distillation; Membrane separation; Energy-saving; Propylene/propane separation
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Funding
- NEDO, Japan
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The energy-saving performances of membrane separation and hybrid membrane separation/distillation processes for a propylene/propane binary system were investigated using a process simulator, and the effect of stage-cut was assessed on product composition and propylene recovery ratio for one-stage and two-stage membrane separation processes as well as hybrid processes comprising a membrane separation unit and a distillation column. The propylene contents in the feed were 30, 60, 90, and 98 mol%. The optimum separation process based on the propylene content in the feed was based on the simulation results. A hybrid process was suitable for 30 mol% propylene, with the permeate and retentate streams fed into a distillation column after membrane separation of the mixture. High energy-saving performances were achieved for both the hybrid process and the membrane separation process for propylene contents of 60, 90, and 98 mol%.
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