Abstract
The combustion of fossil fuel produces large amounts of carbon dioxide (CO2) gas that must be removed due to its environmental impacts. The absorption of CO2 in alkanolamine solution of mono-ethanolamine (MEA) is considered the most effective separation process. In this paper, a model of CO2 separation from a gas stream by a solution of MEA in a packed tower has been mathematically developed for unsteady state predictions. The rate-base model has been adopted as it considers the entire phenomenon occurring during the absorption process. The methodology of the dynamic modelling of the isothermal CO2 chemical absorption was created. The results were obtained in terms of the CO2 partial pressure and the MEA concentration gradients against the column height and time. In addition, the effect of the MEA concentration to the CO2 partial pressure ratio and the liquid to gas flow rate ratio on the column performance has been investigated. The developed model has been validated for the steady state operation of experimental data where satisfied agreement has been noticed.
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