Energy Efficiency of Gas Separation Pressure Swing Adsorption

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Energy Efficiency of Gas Separation Pressure Swing Adsorption ( energy-efficiency-gas-separation-pressure-swing-adsorption )

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3.2.7 Recovery of Species B As the purity of the product generated by this cycle is always 100%, it is important to know the recovery that the cycle is producing. Without knowing this, the work calculation can be taken out of context. In this section we examine the factors that affect recovery. The recovery of species B is found by dividing the number of product moles (which are pure species B) by the number of moles of species B in the feed. Recovery = ^ 0.62; Upon substituting, the result is: Recovery=P "( 1 y o ) ? L (l-B) $.63) PH(i_ yo) We now introduce the pressure ratio, which is the non-dimensional ratio of the high pressure in the cycle to the low pressure. n =?iL (3-64) If we substitute Equation (3.64) into (3.63) we find: Recovery=31zMzl(i _g) (3.65) For this equation to be greater than zero, the following inequality must be satisfied: n> 1 (3.66) i-y0 68

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