Abstract
Using CO2, CO, CH4 experimental isotherms, the inverse problem of sorption equilibrium is solved. It was determine the Dubinin-Astakhov isotherm equation coefficients and construct modeling approximating dependencies that allow calculating a continuous field equilibrium components concentration values in the temperature range of 293-333 K and pressures (1-20)×105 Pa of the hydrogen gas mixture separation process. The approximating dependencies coefficients average values are calculated based on three temperature values (at the boundaries of the interval and the average temperature) in the gas mixture operating temperature range. It was estimated the description accuracy of the adsorption equilibrium by a Dubinin-Astakhov isotherm equation modeling dependence in the operating temperature and pressure range on NaX zeolite and SKT-4 activated carbon on the binary mixtures CO2, CO, CH4 and H2 adsorption process efficiency. Reduce the number of experimental isotherms for calculating the Dubinin-Astakhov equation coefficients, it is permissible to use averaged values of coefficients calculated both for the boundaries of the operating temperature range and for the average temperature from the operating temperature range depending on the adsorption process of hydrogen gas mixture components accuracy calculating required. At the same time the accuracy for the corresponding component in adsorbent layer protective time calculating is reduced by no more than 5%. It is shown that there is a need for at least one experimental isotherm obtained in the operating temperature and pressure range to ensure hydrogen gas mixture separation process calculating acceptable accuracy.
Published Version
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