Abstract
Post-Combustion CO_2 Capture (PCC) is one of the potential Carbon Capture and Storage (CCS) technologies to reduce CO_2 emissions from coal fired power plants. In its absorption process, packing columns are mounted to improve the process efficiency with enhancing the mass transfer between the flue gas and the liquid solvent by increasing gas-liquid interfacial area. However, liquid film flows easily break into rivulet flows according to liquid properties and flow rates, which reduce the gas-liquid interfacial areas and the efficiencies for PCC, as well. In this investigation, we numerically investigate liquid film flows on an inclined wall, which is a simplified model for packing columns, with different liquid properties: surface tensions, viscosities and contact angles, in order to clarify the transition phenomena between film flows and rivulet flows. We derive a function to predict the transition phenomena, which helps to estimate the gas-liquid interfacial area on packing columns.
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