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.

碳分子筛 (CMS) 膜的概念设计和带有热泵集成的蒸馏过程被用来评估丙烯/丙烷分离系统的经济性。采用在多孔氧化铝中空纤维上制备的 CMS 膜来建立集成系统的概念设计。这些技术在资本和运营成本方面进行了评估，并与传统的 C3 分流器进行了比较，以得出总成本最低的技术。建议采用不同的配置以满足 99.6 wt% 产品纯度和 99% 丙烯回收率的设计规格。膜系统热泵在分段0.5、压力比3、丙烯/丙烷选择性28、丙烯渗透20 GPU条件下应用，投资和运行成本分别下降2.3%和68%。与仅蒸馏过程相比分别为 7%。混合系统的成本节约变化通过选择性和渗透性等膜规格得到证实。模拟结果表明，采用膜工艺的热泵在节能和经济方面均具有优势。为混合系统开发了膜渗透性/选择性和成本节约之间的相关等值线。这些发现为更经济地分离气体混合物提供了有用的指导。为混合系统开发了膜渗透性/选择性和成本节约之间的相关等值线。这些发现为更经济地分离气体混合物提供了有用的指导。为混合系统开发了膜渗透性/选择性和成本节约之间的相关等值线。这些发现为更经济地分离气体混合物提供了有用的指导。