[2C09-21] CO2回収・変換

13:30 〜 13:45英語

[2C11] Direct CO₂ capture from air by liquid-solid phase separation using cyclohexyl-substituted diamines

○Xiaopan Xue¹, Xuanbing Li¹, Soichi Kikkawa¹, Hideyuki Kawasoko¹, Seiji Yamazoe¹ (1. Tokyo Metropolitan University)

キーワード：

Direct Air Capture、Carbon Dioxide、Diamine

The advancement of direct air capture (DAC) technologies is crucial for reaching carbon neutrality. We discovered that cyclohexyl-substituted diamines, such as isophoronediamine (IPDA), efficiently capture low concentrations of CO₂ from the air, accompanied by a liquid-to-solid phase transition during absorption. To optimize the process, we developed a blowing-type reactor that reduces solvent consumption while enhancing gas-sorbent interaction. IPDA exhibited high CO₂ removal efficiency from 400 ppm CO₂ in the presence of H₂O vapor, which helped control the viscosity of the sorbent and promoted the formation of carbamic acid.