Based on the analysis of Dual Piston Pressure Swing Adsorption (DP-PSA) technology, in which only one adsorber is used, the possibility of a significant reduction in energy costs for gas mixture separation is been demonstrated. A mathematical model of a DP-PSA system for the separation of gas mixtures is described. Using this mathematical model, optimization of parameters of the DP-PSA system was carried out to produce oxygen from air. The concentration of production oxygen was chosen as the objective function. The optimized parameters were the phase shift angle of piston movement and the ratio of volumes displaced by the pistons. The optimum phase of piston movement in the cylinder filled with air is 51° ahead of the phase of piston movement in the cylinder filled with production oxygen. In this case, the concentration of oxygen at the outlet from the unit reaches 94.7 %. The optimal ratio of volumes displaced by the pistons turned out to be 1.0. The wave approach was used to analyze and calculate the periodic adsorption processes, as well as simulate DP-PSA systems.
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Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, Vol. 55, No. 4, pp. 20–24, April, 2019.
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Kravchenko, M.B., Lavrenchenko, G.K. Effective Use of DP-PSA Gas Separation Technology. Chem Petrol Eng 55, 298–305 (2019). https://doi.org/10.1007/s10556-019-00618-5
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DOI: https://doi.org/10.1007/s10556-019-00618-5