AI Article Synopsis
- * Isophorone diamine (IPDA) showed the best performance, effectively reacting with CO even in the presence of a solvent.
- * IPDA demonstrated excellent reusability, maintaining its efficiency for over 100 hours under direct air capture conditions, indicating its potential for practical applications.
Article Abstract
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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10125313 | PMC |
| http://dx.doi.org/10.1021/acsenvironau.1c00065 | DOI Listing |
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