MODELLING OF CO2 MASS TRANSFER AND HYDRODYNAMICS IN A SEMI-BATCH REACTOR
Olga Velts, Marjaana Hautaniemi, Mai Uibu, Juha Kallas, Rein Kuusik
Strony: 68-79
Opublikowano: 1 Jan 2010
Wyświetlenia: 236
Pobrania: 30
Streszczenie: Present study is considered to be a part of modelling the process for removal of CO2 from industrial gas streams by carbonation of alkaline leachates of oil shale ash formed at Estonian power production. In current paper the chemical phenomena of CO2 absorption into aqueous alkaline solution has been investigated and a mathematical model for description of CO2 mass transfer in a stirred semi-batch reactor presented. The model was built upon the kinetics of absorption phenomena as well as reaction kinetics and hydrodynamic conditions. Based on the experimental data and the developed model, the volumetric mass transfer coefficient, kLa of the process was evaluated for a wide range of operating parameters. The model allows simulating the concentration profiles of reactive species and ions (CO2, CO3 2- , HCO3 - , OH- , H+) in the gas and liquid phase. Additionally, the influence of hydrodynamics on the mass transfer rate of CO2 was described and empirical functions for estimation of kLa and gas fraction ε in the liquid-gas mixture proposed.
Słowa kluczowe: absorption, carbon dioxide, mass transfer, hydrodynamics, modelling
Cytowanie artykułu: Olga Velts, Marjaana Hautaniemi, Mai Uibu, Juha Kallas, Rein Kuusik. MODELLING OF CO2 MASS TRANSFER AND HYDRODYNAMICS IN A SEMI-BATCH REACTOR. Journal of International Scientific Publications: Materials, Methods & Technologies 4, 68-79 (2010). https://www.scientific-publications.net/en/article/1003409/
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