The significance of carbon monoxide (CO) as an invaluable starting material for chemical industries necessitates comprehensive analysis of membrane-based CO separation and recovery. In this regard, highly CO-selective mixed-matrix membranes (MMMs) based on dual carriers [Ag+ ions and Ag nanoparticle (NP)-impregnated MIL-101 (Ag@MIL-101)] were fabricated herein for CO separation. A highly adhesive comb copolymer [poly(glycidyl methacrylate-co-poly(oxyethylene methacrylate); PGMA-co-POEM; PGO] plays a pivotal role as a di-functional matrix in anchoring Ag+ ions and uniformly dispersing Ag@MIL-101 particles, resulting in excellent interfacial properties. An optimal CO-separation performance is achieved at an Ag@MIL-101 loading of 10 wt% (CO permeance of 30.7 GPU and CO/N2 selectivity of 11.8), which is superior compared to that of membranes with single Ag+ ions. This study elucidates the synergistic CO transport effect of the positively charged AgNP-impregnated MOFs and Ag+ ions through the fabricated membranes, and proposes a novel concept of “accelerated transport.” The separation mechanism behind the high CO capture property is delineated using molecular dynamic simulation through morphology and energetic analyses.
Bibliographical noteFunding Information:
This study was supported by the Next Generation Carbon Upcycling Project (NRF-2017M1A2A2043448, 2017M1A2A2043446) from the National Research Foundation (NRF) of South Korea funded by the Ministry of Science and ICT (MSIT), Republic of Korea. M. Kang acknowledges the financial support from an NRF grant funded by the Korean government (MSIT) (NRF-2021R1A6A3A13045250).
© 2022 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering