Cu-impregnated metal–organic frameworks for separation and recovery of CO from blast furnace gas

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2020, 87(0), , pp.102-109
• Main Authors: Yoon, Tae-Ung, Kim, Min June, Kim, Ah-Reum, Kang, Jo Hong, Ji, Doseong, Bae, Youn-Sang
• Format: Article
• Language: English
• Subjects: Blast furnace gas (BFG); Carbon dioxide; Carbon monoxide; Gas separation; Metal–organic frameworks (MOFs); 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2020.03.019

[Display omitted] •An efficient Cu(I)-loading method for producing CO adsorbents is discussed.•Cu(0.5)@MIL-100(Fe) exhibits very high CO/CO2, CO/N2, and CO/H2 selectivities.•Cu(0.5)@MIL-100(Fe) shows efficient separation of CO from a simulated BFG mixture.•Cu(0.5)@MIL-100(Fe) shows reasonable air stability. The separation and recovery of carbon monoxide (CO) from blast furnace gas (BFG) mixtures is an important issue, as CO is a key substance in the petrochemical industry. We developed a series of Cu(I)-impregnated MIL-100(Fe) (Cu(x)@MIL-100(Fe)) with varied Cu loadings through a facile Cu(I)-loading method that does not require high-temperature thermal treatment. Among these, we found that Cu(0.5)@MIL-100(Fe) is the optimal material, with a high CO/CO2 selectivity (15.4) and large working capacity (0.38mmol/g). This material showed very high CO/CO2, CO/N2, and CO/H2 selectivities (33.3, 106.4, and 98.4, respectively) for gas mixtures with a typical BFG composition, excellent CO separation from a simulated BFG mixture (CO/CO2/N2/H2=22:20:55:3vol.%) under dynamic flow conditions, and reasonable air stability. These results show that Cu(0.5)@MIL-100(Fe) is an efficient adsorbent for the recovery of CO from BFG.