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2. Review of Pressure Swing Adsorption 2.1 Reversible Work of Gas Separation The reversible work of gas separation is the minimum work required to separate a mixture of gases, and is independent of process. It is calculated by using the second law of thermodynamics to relate the available energy of the gases in the unmixed state to the available energy of the gases in the mixed state. In subsequent chapters, this reversible work will be compared to the theoretical cycle work for various PSA cycles. In the following analysis, the reversible work of gas separation will be derived. In this study, gases are treated as ideal. That is, a known volume V (in m3), filled with N moles of gas at pressure P (in Pa) can be described by the ideal gas law: Where: R = universal gas constant = 8.3144 J/mol K T = temperature {K} PV =NRT (21) Suppose that the gas is an arbitrary mixture of two gases; NA moles of species A and NB moles of species B, where: NA+NB=N ( 2 2 ) 8PDF Image | Energy Efficiency of Gas Separation Pressure Swing Adsorption
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