Kinetics of absorption of carbon dioxide into aqueous solution of 2-(1-piperazinyl)-ethylamine
Kinetics of absorption of carbon dioxide into aqueous solution of 2-(1-piperazinyl)-ethylamine
复制标题
DOI：
10.1016/j.ces.2008.10.025
复制
发表时间：
2009
影响因子：
4.7
通讯作者：
S. Paul;A. Ghoshal;B. Mandal
中科院分区：
文献类型：
--
作者：
S. Paul;A. Ghoshal;B. Mandal
用湿壁柱吸收装置研究了在303K、313K和323K温度下，在0.083-1.226kmolm−3范围内，2-(1-哌嗪基)乙胺水溶液对CO2的吸附。用实验结果解释了在上述温度范围内，在0.150-1.226kmolm−-3的胺浓度范围内，CO2与PZEA的反应动力学。根据CO2吸收的准一级条件，由动力学测量确定了总的二级反应速率常数。在后面提到的浓度范围内，对胺的反应级数在0.99到1.03之间。计算了各实验条件下的动力学速率参数，并给出了计算结果。在303K、313K和323K下的二级反应速率常数K2分别为31867.6、56354.2和100946m3kmol-1s-1，活化能为47.3kJ·−-1。这种新的胺在酸性气体去除领域中具有很高的反应速率，可以与其他醇胺类溶剂混合使用作为活化剂。
The absorption of CO2into aqueous solution of 2-(1-piperazinyl)-ethylamine (PZEA) were studied at 303, 313, and 323K within the amine concentration range of 0.083–1.226kmolm−3using a wetted wall column absorber. The experimental results were used to interpret the kinetics of the reaction of CO2with PZEA within the amine concentration range of 0.150–1.226kmolm−3for the above mentioned temperature range. Based on the pseudo-first-order condition for the CO2absorption, the overall second order reaction rate constants were determined from the kinetic measurements. The reaction order was found to be in between 0.99 and 1.03 with respect to amine for the later mentioned concentration range. The kinetic rate parameters were calculated and presented at each experimental condition. The second-order rate constants k2, were obtained as 31867.6, 56354.2, and 100946m3kmol–1s–1at 303, 313, and 323K, respectively, with activation energy of 47.3kJmol−1. This new amine in the field of acid gas removal can be used as an activator by mixing with other alkanolamine solvents due to its very high rate of reaction with CO2.