| Summary: | 碩士 === 國立中央大學 === 化學工程與材料工程學系 === 106 === This study utilizes zeolite 5A to separate oxygen from air in order to compare the performance of semicylindrical adsorber with that of traditional cylindrical adsorber for pressure swing adsorption. Semicylindrical adsorber can have better heat compensation during adsorption and desorption, which increases the oxygen purity in Skarstrom cycle.
The air composition is simplified to 21% oxygen, 1% argon and 78% nitrogen. The extended Langmuir isotherm model is used to describe adsorption isotherms of gas components. Linear driving force model is used to describe the mass transfer resistance between gas and solid phase. Furthermore, the simulation program is verified with experimental data. The results show the reliability of program and parameters. Then, we built a PSA process with semicylindrical adsorbers under appropriate operating conditions and compared it with a PSA process with traditional cylindrical adsorbers.
From the results of discussing the operating variables, heat compensation of semicylindrical adsorber does increase oxygen purity for oxygen separation from air, once the adsorber changed from cylindrical one into semicylindrical one. The benefit of heat compensation is more obvious for larger adsorber, higher operating and surrounding temperature, and lower feed pressure in the range of this study.
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