使用带有氨基环己基的二胺的液体胺-固体氨基甲酸相分离系统直接空气捕集二氧化碳。
Direct Air Capture of CO Using a Liquid Amine-Solid Carbamic Acid Phase-Separation System Using Diamines Bearing an Aminocyclohexyl Group.
作者信息
Kikkawa Soichi, Amamoto Kazushi, Fujiki Yu, Hirayama Jun, Kato Gen, Miura Hiroki, Shishido Tetsuya, Yamazoe Seiji
机构信息
Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan.
Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan.
出版信息
ACS Environ Au. 2022 May 10;2(4):354-362. doi: 10.1021/acsenvironau.1c00065. eCollection 2022 Jul 20.
The phase separation between a liquid amine and the solid carbamic acid exhibited >99% CO removal efficiency under a 400 ppm CO flow system using diamines bearing an aminocyclohexyl group. Among them, isophorone diamine [IPDA; 3-(aminomethyl)-3,5,5-trimethylcyclohexylamine] exhibited the highest CO removal efficiency. IPDA reacted with CO in a CO/IPDA molar ratio of ≥1 even in HO as a solvent. The captured CO was completely desorbed at 333 K because the dissolved carbamate ion releases CO at low temperatures. The reusability of IPDA under CO adsorption-and-desorption cycles without degradation, the >99% efficiency kept for 100 h under direct air capture conditions, and the high CO capture rate (201 mmol/h for 1 mol of amine) suggest that the phase separation system using IPDA is robust and durable for practical use.
在使用带有氨基环己基的二胺的400 ppm CO流动系统中，液态胺与固态氨基甲酸之间的相分离表现出>99%的CO去除效率。其中，异佛尔酮二胺[IPDA；3-(氨基甲基)-3,5,5-三甲基环己胺]表现出最高的CO去除效率。即使在作为溶剂的HO中，IPDA也能以≥1的CO/IPDA摩尔比与CO反应。捕获的CO在333 K时完全解吸，因为溶解的氨基甲酸根离子在低温下会释放出CO。IPDA在CO吸附-解吸循环下的可重复使用性，在直接空气捕获条件下100小时内保持>99%的效率，以及高CO捕获率（1摩尔胺为201 mmol/h）表明，使用IPDA的相分离系统对于实际应用来说是坚固耐用的。
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