DETERMINATION OF THE DYNAMIC ADSORPTION CAPACITY OF ADSORBENTS FOR WATER VAPOR
Authors
Ashurov Sherali Mustafoyevich, Bozorov Otabek Nashvandovich, Kuyboqarov Oybek Ergashovich
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The article presents a methodological and technological assessment of determining the dynamic adsorption capacity of composite adsorbents for water vapor under conditions relevant to natural gas drying. The study considers KA-series adsorbents prepared on the basis of activated Navbahor bentonite, zeolite 4A, activated alumina, silica gel and a binder. Dynamic capacity is treated not only as a mass balance value but also as an integral technological indicator connected with breakthrough time, saturation time, outlet moisture concentration, dew point depression, pressure drop, bed utilization and regeneration stability. The operating variables considered include gas flow rate, adsorbent mass, bed height, granule diameter, inlet moisture content, temperature, pressure and regeneration regime. Particular attention is paid to the KA-4 composite adsorbent, which combines a local mineral matrix, a selective microporous zeolite phase, a thermally stable alumina phase and a mesoporous silica-gel component. Representative dynamic drying data show that KA-4 provides a breakthrough time of 8.6 h, saturation time of 12.8 h, dynamic water adsorption capacity of 0.146 kg/kg, outlet dew point of about -43 °C and drying efficiency of 96.9 %. The results demonstrate that the reliable determination of dynamic capacity requires simultaneous analysis of the breakthrough curve, mass-transfer zone and regeneration recovery, because static water uptake alone does not fully describe the industrial performance of an adsorbent bed. The proposed approach can be used for selecting optimal adsorbent composition and operating conditions for deep dehydration of natural gas.
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Authors
Ashurov Sherali Mustafoyevich, Bozorov Otabek Nashvandovich, Kuyboqarov Oybek Ergashovich
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