Перегляд за Автор "M.B. Kravchenko"

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    Effect of Adsorbent Grain Size on the Pressure Swing Adsorption
    (2019) M.B. Kravchenko
    An analytical solution is obtained for a system of differential equations consisting of the equation for diffusion and absorption of a component in adsorbent grains and the balance equation for this component moving in the adsorbent layer.The technique for calculation of steady-state periodic adsorption processes based on expansion of a concentration signal into Fourier series of eigenfrequencies of this adsorption process is proposed. After decomposition each of the eigenwaves independently of the others is passed through the adsorbent layer, and at the output from this layer all this solutions for individual eigenwaves are summed.  The solution to a problem of passing an arbitrary periodic concentration signal through the adsorbent layer is obtained as a result of summing the solutions for individual eigenwaves.The proposed method takes into account nonstationary diffusion processes inside the adsorbent grains. It makes possible to analyze effect of the adsorbent grain sizes on a pressure swing adsorption processes.
  • Документ
    The depth of sorbath penetration in periodic adsorption processes
    (2019) M.B. Kravchenko
    The depth of sorbate penetration into the adsorbent grains is a new dimensional criterion for estimating efficiency of using the adsorbent in periodic adsorption and desorption processes. The possibility of this criterion utilization in preliminary calculations of oxygen production plants working by the pressure swing adsorption method is shown on the  specific example.
  • Документ
    Wave approach for modeling pressure swing adsorption
    (2019) M.B. Kravchenko
    A new approach to modeling of the pressure swing adsorption (PSA) based on a wave method for calculating non-stationary periodic mass transfer processes is proposed. The analysis of solutions for plants designed to produce oxygen from air is given. The conditions necessary for highly efficient operation of PSA plants are formulated. The results of calculations for various brands of zeolites are followed, allowing optimizing a choice of zeolite for the set working conditions.