Highly selective adsorption of CO over CO2 in a Cu(I)-chelated porous organic polymer

Jung Woon Yoon, Tae Ung Yoon, Eun Jung Kim, Ah Reum Kim, Tae Sung Jung, Sang Sup Han, Youn Sang Bae

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57 Citations (Scopus)


Cu(I) species were successfully chelated to nitrogen atoms in a nitrogen-rich porous organic polymer (SNW-1) by mixing with a CuCl solution (Scheme 1). Although pristine SNW-1 adsorbs CO2 better than CO, Cu(I)-incorporated SNW-1 (nCu(I)@SNW-1) shows selective CO adsorption over CO2 because of the π-complexation of CO with Cu(I). To the best of our knowledge, this is the first CO/CO2 selectivity observed for POP-based materials. 1.3Cu(I)@SNW-1 exhibits high CO/CO2 selectivity (23) at 1 bar and a large CO working capacity (0.6 mmol/g) at 0.1–1 bar. Moreover, the breakthrough and thermogravimetric experiments show that 1.3Cu(I)@SNW-1 can effectively separate CO from CO2 under dynamic mixture conditions and can be easily regenerated under mild regeneration conditions without heating the column. Furthermore, 1.3Cu(I)@SNW-1 exhibited a good stability under exposure to atmospheric air for 3 h or 9 h. These results suggest that chelating Cu(I) species to a nitrogen-rich porous organic polymer can be an efficient strategy to separate and recover CO from CO/CO2 mixtures.

Original languageEnglish
Pages (from-to)321-327
Number of pages7
JournalJournal of Hazardous Materials
Publication statusPublished - 2018

Bibliographical note

Funding Information:
This work was supported by In-house Research and Development Program of the Korea Institute of Energy Research (KIER) (B7-2437-03). This work was also supported by the National Research Council of Science & Technology (NST) grant by the Korea government (MSIP) (No. CRC-14-1-KRICT).

Publisher Copyright:
© 2017 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis


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