Highly Efficient and Selective Formation of Hydrogencarbonate in CO<sub>2</sub> Absorption Process Using Piperidine and Piperazine Derivatives
作者:Man Sub Shin、Yoon Kook Park、Sung Chan Nam、Kwang-Jin Hwang
DOI:10.1246/cl.2012.142
日期:2012.2.5
This investigation demonstrated that bicarbonate ions were selectively formed over carbamate in a CO2 absorption process using piperidine and piperazine derivatives based on 13C NMR. Piperidines with methyl or hydroxymethyl substituent at 2 position (PiP-Me and PiP-MeOH) and 2,5-dimethylpiperazine (DM-PiZ) generated the bicarbonate ions as main adducts in reaction with CO2. The absorptions of CO2 by those aqueous amines (PiP-Me and DM-PiZ) were faster than those of MEA (2-aminoethanol).
这项研究根据 13C NMR 证明,在使用哌啶和哌嗪衍生物吸收二氧化碳的过程中,碳酸氢根离子选择性地形成于氨基甲酸酯离子。在 2 位具有甲基或羟甲基取代基的哌啶(PiP-Me 和 PiP-MeOH)和 2,5-二甲基哌嗪(DM-PiZ)与 CO2 反应生成的主要加合物是碳酸氢根离子。这些水胺(PiP-Me 和 DM-PiZ)吸收二氧化碳的速度比 MEA(2-氨基乙醇)快。