Kikkawa et al. (2022): Direct Air Capture of CO2 Using a Liquid Amine–Solid Carbamic Acid Phase-Separation System Using Diamines Bearing an Aminocyclohexyl Group

Soichi Kikkawa, Kazushi Amamoto, Yu Fujiki, Jun Hirayama, Gen Kato, Hiroki Miura, Tetsuya Shishido, Seiji Yamazoe IN: ACS (American Chemical Society) Environment; https://doi.org/10.1021/acsenvironau.1c00065

The phase separation between a liquid amine and the solid carbamic acid exhibited >99% CO2 removal efficiency under a 400 ppm CO2 flow system using diamines bearing an aminocyclohexyl group. Among them, isophorone diamine [IPDA; 3-(aminomethyl)-3,5,5-trimethylcyclohexylamine] exhibited the highest CO2 removal efficiency.

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