Highly Efficient and Selective Formation of Hydrogencarbonate in CO2 Absorption Process Using Piperidine and Piperazine Derivatives

초록

This investigation demonstrated that bicarbonate ions were selectively formed over carbamate in a CO2 absorption process using piperidine and piperazine derivatives based on C-13 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).

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