Physical Absorption of CO2and Sulfur Gases from Coal Gasification: Simulation and Experimental Results

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Abstract
The algorithm proposed by Feintuch and Treybal was used to predict packed absorption column performance. Problems encountered may be traced to inaccurate phase equilibrium information or failure to specify accurately the composition of the inlet liquid stream. Improvements in the calculational procedures and accumulation of better experimental data should be made. The effect of specified convergence tolerances for several internal iterative calculations on computation time was examined along with the effect of step size on model prediction accuracy. Because of the lack of information in the literature on the effective interfacial area of this packing in adiabatic absorption, several different correlations were tested. The mass transfer coefficient correlations suggested by Shulman were correct for this system; the effective interfacial area for mass transfer was < 5% of the total packing surface area. Propane, propylene and butane will be added to the model in the future. The techniques used to describe absorber operation will be applied to the stripper and compared to experimental results. The overall objective was to develop the capability to simulate acid gas removal system performance.