In situ capture and value-added utilization of CO2 from flue gas using an ionic liquid polymer supported Zn catalyst

Abstract

In this work, a porous organic polymer supported Zn catalyst (Zn@PIP-1) complexed with an ionic liquid (IL), zinc halide (ZnX2), and vinyl-functionalized triphenylphosphine (p-3vPPh3) has been synthesized by a one-pot method and used for the capture and conversion of waste carbon dioxide (CO2 19.4%) from flue gases of complex composition into valuable cyclic carbonates. Combined structure characterization studies of Zn@PIP-1 revealed successful integration of multiple sites and excellent structural stability, conferring high activity and stability under mild, additive-free conditions. The catalyst showed good group tolerance and a series of carbonates with different structures were successfully obtained in high yields. In addition, the catalyst was recyclable and could be successively used 5 times without obvious activity loss. We systematically evaluated the catalyst's robustness through rigorous poisoning resistance assessments against major flue gas contaminants. The experimental data revealed exceptional tolerance thresholds: (1) sustained catalytic efficiency (99% yield retention) under extreme oxidative conditions (O2, 53 333 ppm), (2) unimpaired performance at CO concentrations exceeding 33 333 ppm, and (3) 99% product yield maintained in the presence of 51 233 ppm H2O. This work provides some insights into the design of stable polymer catalysts for efficient CO2 transformation.

Graphical abstract: In situ capture and value-added utilization of CO2 from flue gas using an ionic liquid polymer supported Zn catalyst

Supplementary files

Article information

Article type
Paper
Submitted
10 May 2025
Accepted
04 Jun 2025
First published
24 Jun 2025

Green Chem., 2025, Advance Article

In situ capture and value-added utilization of CO2 from flue gas using an ionic liquid polymer supported Zn catalyst

H. Ni, K. Zhao, S. Liu, X. Dai, C. Liu, X. Gao, J. Zhang, H. Liu, K. Huang, X. Cui and F. Shi, Green Chem., 2025, Advance Article , DOI: 10.1039/D5GC02324F

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