Just Accepted
Just Accepted Articles have been posted online after technical editing and typesetting for immediate view. The final edited version with page numbers will appear in the Current Issue soon.
Submit a Manuscript
Hydroxyl-functionalized Ni7-cluster-based MOF for cost-effective acetylene separation
Yaqing Fan, Jiexi Guo, Rizhao Zhang, Bao Li*, Jia Li*
https://doi.org/10.1016/j.cjsc.2026.100926
Metal-organic frameworks; C2H2/C2H4 separation; C2H2/CO2 separation; Acetylene recovery
ABSTRACT
Designing adsorbents for the efficient separation of challenging gas pairs, such as C2H2/C2H4 and C2H2/CO2, is a crucial yet demanding goal in separation science. Here, we implemented a pore-engineering strategy to tailor the pore environment of a metal-organic framework (MOF) via functional groups, thereby enhancing its C2H2/C2H4 and C2H2/CO2 selectivity performance. The introduction of hydroxyl (-OH) groups into Ni7-MOF not only reduces pore dimensions but also promotes a multitude of guest-host interactions within the confined pore environment. The hydroxyl-functionalized Ni7-OH demonstrates high selectivity for C2H2 over C2H4 and CO2 between 273 and 308 K. Dynamic breakthrough experiments further confirm its dual-functional capability. Compared to Ni7-MOF, Ni7-OH not only delivers superior ethylene-purification efficiency but also enables highly effective C2H2/CO2 separation, allowing high-purity C2H2 (>99.9%) to be recovered through mild temperature-swing desorption. The introduction of hydroxyl groups fine-tunes the binding environment, differentially strengthening the key C–H∙∙∙Ni interaction that favours C2H2 over C2H4 and CO2, as supported by density functional theory (DFT) calculations. With its excellent stability, regeneration ability, and balanced performance, Ni7-OH represents a promising adsorbent for energy-efficient C2H2 removal from C2H4 streams and C2H2 recovery from C2H2/CO2 mixtures.
- Address: Fuzhou High & New Technology Industrial Zone, Shangjie, Minhou, Fuzhou, Fujian 350108, China
- Tel: (86)-591-63173769, 63173770
- E-mail: cjsc@fjirsm.ac.cn
CN 35–1112/TQ, ISSN 0254–5861, Online ISSN: 2949-768X Copyright @ 2022 Chinese Journal of Structural Chemistry-www.Chinese Journal of Structural Chemistry.net. All Rights Reserved 闽ICP备2022002645号-1