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- Title
Techno-economics and sensitivity analysis of hybrid process combining carbon molecular sieve membrane and distillation column for propylene/propane separation.
- Authors
Park, Jaedeuk; Kim, Seong-Joong; Lee, Inkyu; Shin, Jae-Wook; Park, You-In; Kim, Kiwoong; Park, Yong-Ki
- Abstract
[Display omitted] • Carbon molecular sieve membrane supported on alumina hollow fiber for C3 separation. • Selectivity of 28 and permeance of 20 GPU according to long-term stabilization test. • 25.3% and 14.4% total cost saving from typical distillation and heat-pump assisted process. • Techno-economic analysis and sensitivity study according to membrane performance. • Development of correlation contours between membrane performance and cost savings. The conceptual designs of a carbon molecular sieve (CMS) membrane and a distillation process with heat pump integration were used to evaluate propylene/propane separation system economics. A CMS membrane prepared on a porous alumina hollow fiber was employed to establish the conceptual design of the integrated system. The technologies were evaluated in terms of capital and operating costs and compared to a conventional C3-splitter to elicit the one that minimizes total costs. Different configurations are suggested to satisfy the design specifications of 99.6 wt% product purity and 99% propylene recovery rate. When the heat pump with membrane system was applied in condition of stage cut 0.5, pressure ratio 3, propylene/propane selectivity 28, and propylene permeance 20 GPU, the capital and operating costs decreased by 2.3% and 68.7% compared to distillation only process, respectively. The cost saving variation of the hybrid system was confirmed with membrane specifications such as selectivity and permeance. The simulation results indicated that the heat pump with membrane process is advantageous in terms of both energy and economic savings. A correlation contour between membrane permeance/selectivity and cost saving was developed for the hybrid systems. The findings provide a helpful guide to more economically separate gas mixtures.
- Subjects
MEMBRANE distillation; MOLECULAR sieves; HYBRID systems; PROPENE; SENSITIVITY analysis; SOLAR stills
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2021, Vol 172, p204
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2021.06.009