Creating high CO/CO2 selectivity and large CO working capacity through facile loading of Cu(I) species into an iron-based mesoporous metal-organic framework

Ah Reum Kim, Tae Ung Yoon, Seung Ik Kim, Kanghee Cho, Sang Sup Han, Youn Sang Bae

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Achieving both high CO/CO2 selectivity and large CO working capacity in an adsorbent is very challenging. In this work, we have loaded Cu(II) species into large pores of an iron-based metal-organic framework (MOF) with a large surface area and reduced them into Cu(I) species under mild conditions by utilizing Fe(II) sites in the pores. Remarkably, the Cu(I)-incorporated MOF (0.9Cu@MIL-100) exhibits a high CO/CO2 selectivity (29 at 100 kPa) and a large CO working capacity (1.61 mmol/g at 10-100 kPa) simultaneously, which has not been observed for previously reported adsorbent materials. Moreover, 0.9Cu@MIL-100 also presents very high CO/CH4 and CO/N2 selectivities (87 and 677). Furthermore, breakthrough and cyclic adsorption-desorption experiments confirm that this material can efficiently separate CO/CO2 mixtures under dynamic mixture flow conditions and can be easily regenerated under mild conditions. This study provides a new strategy for developing adsorbents with both high CO/CO2 selectivities and large CO working capacities.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalChemical Engineering Journal
Volume348
DOIs
Publication statusPublished - 2018 Sep 15

Bibliographical note

Funding Information:
This work was supported by “Next Generation Carbon Upcycling Project” (Project No. 2017M1A2A2043449) through the National Research Foundation ( NRF ) funded by the Ministry of Science and ICT , Republic of Korea. Additionally, we would like to acknowledge the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIP ) (No. NRF-2018M2A8A5023391 ). This work was also conducted under the framework of Research and Development Program of the Korea Institute of Energy Research. ( KIER , B7-2437-03 ). Appendix A

Funding Information:
This work was supported by “Next Generation Carbon Upcycling Project” (Project No. 2017M1A2A2043449) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea. Additionally, we would like to acknowledge the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2018M2A8A5023391). This work was also conducted under the framework of Research and Development Program of the Korea Institute of Energy Research. (KIER, B7-2437-03).

Publisher Copyright:
© 2018 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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