Modeling of the multidispersed adsorptionacatalytic system for removing organic impurities from waste gases

This paper considers a new approach of improving the efficiency of adsorptionacatalytic removal of volatile organic compounds (VOCs) from waste gases based on the use of a combined structured fixed bed consisting of a coarse-grained adsorbentacatalyst and a microfiber catalyst. Numerical mathematical modeling showed that during high-temperature oxidative regeneration of the adsorbentacatalyst, the microfiber catalyst (a140.01 mm in diameter) is heated much faster than large pellets (a142a20 mm in diameter) of the adsorbentacatalyst due to the significantly higher external specific surface area (a14500a5000 times greater). This allows one to efficiently oxidize unoxidized VOCs desorbed from the surface of the adsorbentacatalyst, thus minimizing the desorption losses and significantly increasing the degree of gas purification (up to 99%).