The article presents the results of comprehensive comparative studies of domestic and foreign industrial adsorbents of the zeolite type and silica gels for drying processes of associated petroleum and natural gas during field gas treatment. Domestic and foreign adsorbents of zeolite type NaX-BS and 13X and silica gels GP-SORB H and KC-Trockenperlen N were studied under static and dynamic conditions of gas drying. Humid methane and air were used as a model gas. It was revealed that the domestic industry produces efficient zeolite-type adsorbents (NaX-BS) and silica gels (GP-SORB H) for drying associated petroleum and natural gas; these absorbents have high adsorption activity and are not inferior in quality to foreign analogues. It was found that NaX-BS zeolite has higher values of such characteristics as adsorption activity and time of protective action of the layer among the studied adsorbents. It has been shown that the minimum time to reach equilibrium is observed for NaX-BS zeolite at 50°C. It has been experimentally established that zeolite adsorbents, in comparison with silica gels at 50°C, have a higher maximum adsorption value and a shorter time to achieve it. But silica gel adsorbents, in comparison with zeolite ones at 5 and 25°C, have a higher maximum adsorption value, but the time to reach an equilibrium state on silica gels is much longer. It has been established that in drying humid air, over the entire range of changes in temperature and volumetric gas flow rate, the dynamic activity of zeolite adsorbents is 1.5-2.5 times greater than for silica gels. Studies of adsorbents in methane drying have been carried out. It was noted that in methane dehydration, the dynamic activity of zeolites is also significantly greater than the dynamic activity of silica gels (approximately 2 times). The stability of the dynamic adsorption activity of adsorbents was studied in 50 adsorption – regeneration cycles in air drying. It has been established that with an increase in a number of adsorption – regeneration cycles, the dynamic activity of all adsorbents decreases by 1.8-2.5%. The research results make it possible to use domestic adsorbents for the purpose of import substitution in the drying of associated petroleum and natural gases.
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