Characterization and absorption of carbon dioxide into aqueous solution of amino acid ionic liquid [N1111][Gly] and 2-amino-2-methyl-1-propanol
Characterization and absorption of carbon dioxide into aqueous solution of amino acid ionic liquid [N1111][Gly] and 2-amino-2-methyl-1-propanol
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DOI：
10.1016/j.cej.2012.07.108
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发表时间：
2012-09
影响因子：
15.1
通讯作者：
Zuoming Zhou;Guohua Jing;Lan-Juan Zhou
中科院分区：
文献类型：
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作者：
Zuoming Zhou;Guohua Jing;Lan-Juan Zhou
将氨基酸离子液体甘氨酸四甲基铵（[N1111][Gly]）与2-氨基-2-甲基-1-丙醇（AMP）水溶液混合，形成一种新的捕集CO2的溶剂。在298- 323 K温度范围内，研究了0-0.40molL-1[N1111][Gly]+0.95molL的AMP水溶液的密度、粘度和pH值。在相同的温度和浓度下，[N1111][Gly]+AMP溶液中CO2的溶解度和扩散系数进行了估计。采用气液界面平坦的双搅拌槽吸收器，研究了[N1111][Gly]+AMP水溶液吸收CO2的反应动力学。结果表明，[N1111][Gly]在0.95molL−1AMP水溶液中对CO2的吸收有促进作用。[N1111][Gly]+AMP水溶液吸收CO2的动力学区域为快速准一级反应。增强因子E与CB 01/2呈线性关系，ΔE与[N1111][Gly]浓度呈线性关系，[N1111][Gly]+AMP水溶液吸收CO2的活化能为40.7kJmol−1。
Amino acid ionic liquid tetramethylammonium glycinate ([N1111][Gly]) was mixed with 2-amino-2-methyl-1-propanol (AMP) aqueous solution to form a new solvent for CO2capture. The density, viscosity and pH of 0–0.40molL−1[N1111][Gly]+0.95molL−1AMP aqueous solution were investigated at a temperature range of 298–323K. Solubility and diffusivity of CO2in [N1111][Gly]+AMP solutions at the same temperatures and concentrations was estimated. The reaction kinetics of CO2absorption into [N1111][Gly]+AMP aqueous solution was investigated using a double stirred-cell absorber with a planar gas–liquid interface. The results indicated that [N1111][Gly] promoted the absorption of CO2in 0.95molL−1AMP aqueous solutions. The kinetics region of absorption CO2into aqueous [N1111][Gly]+AMP solution was the fast pseudo-first order reaction regime. Moreover, the enhancement factor E was linear with CB01/2and ΔE linear with the concentration of [N1111][Gly] in the mixed aqueous solution, and the activation energy of [N1111][Gly]+AMP aqueous solution absorbing CO2was 40.7kJmol−1.