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[Purpose] In order to study the influence of gas-liquid mass transfer characteristics in decarbonization towers under different operating conditions on decarbonization efficiency, [Method] the actual exhaust gas emission characteristics of ocean-going ships as the basis is adopted, a three-dimensional computational fluid dynamics(CFD) model coupling gas-liquid flow, heat and mass transfer, and chemical reactions is established using the Eulerian-Lagrangian method. A user-defined function(UDF) is employed to achieve a refined simulation of the CO2 absorption process. The system comprehensively examines the gas-liquid concentration gradient, heat and mass transfer, and CO2 absorption characteristics of NaOH solution and seawater-NaOH solution under varying NaOH volume fraction, CO2 volume concentrations, absorber flow rates, and inlet flue gas temperatures. [Result] Results indicate that within the NaOH volume fraction range of 0.5 mol/L～2.5 mol/L, the decarbonization rate significantly increases. The lower the CO2 volume concentration, the higher the decarbonation rate, resulting in a larger CO2 volume concentration gradient within the tower, with a maximum variation rate of 83.33%. Increased absorbent flow elevates the concentration of slurry droplets, enhances the local mass transfer driving force at the gas-liquid interface, intensifying the formation of localized vacuum conditions between gas and liquid phases, yielding a maximum decarbonization rate increase of 27.71 percentage points. Increasing the inlet flue gas temperature releases substantial latent heat of vaporization, which promoting CO2 absorption. Under identical operating conditions, seawater-NaOH solutions and NaOH solutions maintain comparable decarbonization efficiency and instantaneous CO2 absorption rates, demonstrating strong potential and promising application prospects. [Conclusion] The research findings provide theoretical guidance and data support for the optimization of decarbonization technology for ocean-going ships.
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Basic Information:
DOI：10.13788/j.cnki.cbgc.2026.08.02
China Classification Code:X736.3;U664.9
Citation Information:
[1]QU Ziyi,LI Yaxiong,LONG Haipeng ,et al.CFD Simulation Analysis of Wet Flue Gas Decarbonization for Ocean-Going Ships[J].Ship Engineering,2026,48(08):17-30.DOI:10.13788/j.cnki.cbgc.2026.08.02.
Fund Information:
重庆市教委科学技术研究项目（201902194007）
2026-08-25
2026-08-25