Characterizing CO2 capture with aqueous solutions of LysK and the mixture of MAPA + DEEA using soft computing methods

Soleimani, Reza; Abooali, Danial; Shoushtari, Navid Alavi

Characterizing CO2 capture with aqueous solutions of LysK and the mixture of MAPA + DEEA using soft computing methods

2018

Soleimani, Reza | Abooali, Danial | Shoushtari, Navid Alavi

Accurate data in the field of CO₂-capture using new high potential absorbents as alternatives to the traditional ones is of great interest within scientific and engineering communities. In this direction, two robust modeling strategies, viz. Stochastic Gradient Boosting (SGB) tree and Genetic Programming (GP) are used to 1) predict the solubility of CO₂ in aqueous potassium lysinate (LysK) solutions as a function of temperature, partial pressure of CO₂, and the mass fraction of LysK; and 2) predict the solubility of CO₂ in the mixture of MAPA + DEEA aqueous solutions as a function of temperature, partial pressure of CO₂, and the concentration of MAPA and DEEA based on previously published data. The efficiency and precision of the proposed models are checked graphically and statistically. Results show that both proposed models are competent in accurate and reliable predictions (R² > 0.98 and RMSE < 0.06). However, the SGB models are superior to the GP models. Additionally, the proposed models are compared to the modified Kent-Eisenberg model for predicting the CO₂ solubility in LysK solutions, and shown to have better outputs.

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