Absorption characteristics of carbon dioxide into an O/W emulsion absorbent containing N-methylcyclohexylamine/2,6-dimethylpiperidine

作者：Jeon Soo Bin; Cho Sang Won; Lee Sang Sup; Jang Se Yong; Oh Kwang Joong^*

来源：Journal of the Taiwan Institute of Chemical Engineers, 2014, 45(5): 2673-2680.

DOI：10.1016/j.jtice.2014.08.008

• Carbon dioxide
• N-methylcyclohexylamine
• 2,6-dimethylpiperidine
• Emulsion
• Absorption rate
• Absorption equilibrium

A novel absorbent was developed using an oil/water (O/W) emulsion absorbent with lipophilic amine. N-methylcyclohexylamine (MCHA) and 2,6-dimethylpiperidine (DMPD) were selected as the absorbents and Tween 80 was used as the emulsifier. The absorption rate and equilibrium were measured using a wetted wall column and vapor-liquid equilibrium apparatus, respectively, to investigate the carbon dioxide (CO2) absorption performance of each absorbent. The monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP) solutions were used for comparison. The absorption rate of CO2 into the emulsion absorbent was higher than that into the aqueous MEA solution. The CO2 loading ratio of the MCHA and DMPD were 0.87 and 0.72 at 313 K, respectively. Additionally, the effective CO2 loading in MCHA and DMPD were 0.31 and 0.4 CO2/mol amine respectively, which is higher than that in the MEA and AMP solutions. These results show that the emulsion absorbent containing the lipophilic amine may show effective CO2 absorption performance.

• 出版日期2014-9