Efficiency evaluation of novel liquid potassium lysinate chemical solution for CO2 molecular removal inside the hollow fiber membrane contactor: Comprehensive modeling and CFD simulation

Abstract

The efficacious removal of greenhouse gases is an indisputable necessity to mitigate their detrimental anthropogenic effects on environment. This paper aims to evaluate the performance of novel reactive potassium lysinate (PL) amino acid solution to remove the CO2 acidic contaminant from CO2/CH4 gaseous blend through the hollow fiber membrane contactor (HFMC) employing computational fluid dynamics (CFD) and finite element method (FEM). For this purpose, a 2D simulation and consequently a mathematical modeling is developed and simultaneously solved. Due to the application of a novel amino acid solution, there is no experimental data for validating the simulation results. Therefore, the validity of simulation results is confirmed by comparison of simulation/experimental results for CO2 flux using deionized water (DIW). The results imply a brilliant agreement between model results and experimental data with average relative error (ARE) of about 6%. Based on the results, PL solution is appointed as an effective absorbent due to removing about 91% of inlet CO2. Furthermore, evaluation of computational simulation outcomes illustrates the encouragement of CO2 removal percentage by increasing some design/operational parameters like the hollow fibers total number, membrane porosity and module length.