四丁基季鏻羧酸盐离子液体的物理化学性质与CO_2溶解度(英文)

Physicochemical Properties and CO_2 Solubility of Tetrabutylphosphonium Carboxylate Ionic Liquids

在298.15-348.15 K温度范围内,测定了四种四丁基季鏻羧酸盐离子液体([P_(4444)][CA])的密度、粘度、折射率、电导率等物理化学性质,得出了其随温度的变化关系,并获得了不同温度下该类离子液体的热膨胀系数。其次,在1个大气压和313.15 K温度下,测定了CO_2在该类离子液体中的溶解度,结果表明,四丁基季鏻丁酸盐吸收CO_2的性能最好,吸收量为0.4 mol?mol^(-1),平衡时间小于5 min。

Four tetrabutylphosphonium carboxylate ionic liquids（[P_（4444）][CA]） were prepared, and their densities,viscosities, refractive indices, and conductivities were measured and correlated with thermodynamic and empirical equations in the temperature range of 298.15-348.15 K. The influence of temperature on these four properties of [P_（4444）][CA] was discussed, and their thermal expansion coefficient values were calculated. The CO_2 absorption capacity of [P_（4444）][CA] was studied at 313.15 K and 100 k Pa. The results indicated that [P_（4444）][Buty]had the highest CO_2 capture capacity among these ionic liquids, with an absorption capacity of 0.4 mol？mol^（-1） and balance time of less than 5 min.