A Tailor-Made Interpenetrated MOF with Exceptional Carbon-Capture Performance from Flue Gas

By Weibin Liang, P. Bhatt, A. Shkurenko, K. Adil, G. Mouchaham, Himanshu Aggarwal, A. Mallick, A. Jamal, Youssef Belmabkhout, Mohamed Eddaoudi. Chem, 2019

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Summary Metal-organic frameworks (MOFs) have attracted significant attention as sorbents for low-energy separation of CO2 from flue gas. Herein, we report the use of an interpenetration approach to developing a fluorinated MOF with the appropriate pore system to enable the efficient capture of CO2 from flue gas at 298 K. The MOF, dptz-CuTiF6, exhibits excellent volumetric and gravimetric CO2 uptakes at 10% CO2 and 298 K, which are superior to those of the reference aqueous amine technique, with significantly lower energy input for regeneration (38 kJ mol−1 versus 105 kJ mol−1). In cyclic breakthrough experiments, dptz-CuTiF6 achieves complete CO2 desorption at 298 K under inert gas purging. Single-crystal X-ray diffraction studies demonstrate that the exceptional CO2 adsorption capacity, moderate CO2 heat of adsorption, and high CO2-N2 selectivity are due to the optimal packing of the CO2 molecules within the MOF as well as the favorable thermodynamics and kinetics from cooperative host-guest interactions.

Subfields: Inorganic Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/fb6e3a06c180a8f41061dab41bf504a3fdf2789c