Nonaqueous amine-based system is an attractive solution to overcome high-energy-intensive CO2 cap-ture process using the conventional aqueous amines.Advanced nonaqueous absorbent of 2-(butylamino)ethanol (BAE) with 2-butoxyethanol (2-BE) has been recently proposed for low-energy-consumption CO2 capture.In this work,Henry's law constants of CO2 in the BAE/2-BE blend were obtained by N2O/CO2 analogy,and correlated in the temperature range of (283-333) K.Vapor-liquid equi-librium (VLE) data for the BAE + CO2 + 2-BE system at 65.4％ (mass) BAE were also determined in a stirred equilibrium cell at temperatures of (313-393) K and CO2 partial pressures up to 275 kPa.A single appar-ent equilibrium constant KCO2,app was proposed for this system and correlated as a function of tempera-ture,carbonated degree of amine and CO2 loading.Solubility data were well represented by the modified Kent-Eisenberg model with an average absolute relative deviation (AARD) of 13％.

Yu Dong;Tiantian Ping;Shufeng Shen

School of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China

中国化学工程学报（英文版）

[1]Yu Dong;Tiantian Ping;Shufeng Shen-.Solubility of CO2 in nonaqueous system of 2-(butylamino)ethanol with 2-butoxyethanol:Experimental data and model representation)[J].中国化学工程学报（英文版）,2022(01):441-448

nonaqueous,butylamino,butoxyethanol,Nonaqueous,KCO2,Eisenberg

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