The efficient separation of N 2 O/CO 2 using unsaturated Fe 2+ sites in MIL-100Fe

It is a big challenge to separate N 2 O from CO 2 using adsorption because they have similar physical properties. The Fe 3+ –F − site in MIL-100Fe transforms to an unsaturated Fe 2+ site under high-temperature activation (300 °C), and the target sorbent MIL-100Fe-300 exhibits the biggest difference...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2021-07, Vol.57 (54), p.6636-6639
Main Authors: Wang, Li, Zhang, Feifei, Yang, Jiangfeng, Li, Libo, Li, Jinping
Format: Article
Language:English
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Summary:It is a big challenge to separate N 2 O from CO 2 using adsorption because they have similar physical properties. The Fe 3+ –F − site in MIL-100Fe transforms to an unsaturated Fe 2+ site under high-temperature activation (300 °C), and the target sorbent MIL-100Fe-300 exhibits the biggest difference in CO 2 and N 2 O adsorption capacity, and the selectivity of N 2 O/CO 2 (50%/50%) is up to 3.00 at 298 K. According to DFT calculations, the original Fe 3+ –F − site has strong interaction with CO 2 , but the open Fe 2+ site has a stronger interaction with N 2 O. Through a breakthrough experiment, it was confirmed that MIL-100Fe-300 has the best N 2 O/CO 2 separation performance, making it potentially a useful material in industry.
ISSN:1359-7345
1364-548X
DOI:10.1039/D1CC01659H