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DOE OSTI · 1811898

Porous Covalent Organic Polymers for efficient Fluorocarbon-based Adsorption Cooling

Zheng, Jian·Wahiduzzaman, Mohammad·Barpaga, Dushyant·Trump, Benjamin A.·Gutierrez-Tinoco, Oliver Y.·Thallapally, Praveen K.·Ma, Shengqian·McGrail, Bernard P.·Maurin, Guillaume·Motkuri, Radha K.
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Abstract

Adsorption-based cooling is an energy-efficient renewable-energy technology that can be driven using low-grade industrial waste heat and/or solar heat. Here, we report the first exploration of fluorocarbon adsorption using porous covalent organic polymers (COPs) for this cooling application. High fluorocarbon R134a equilibrium capacities and unique overall linear-shaped isotherms are revealed for the materials, namely COP-2 and COP-3. The key role of mesoporous defects on this unusual adsorption behavior was demonstrated by molecular simulations based on atomistic defect-containing models built for both porous COPs. Analysis of simulated R134a adsorption isotherms for various defect-containing atomistic models of the COPs shows a direct correlation between higher fluorocarbon adsorption capacities and increasing pore volumes induced by defects. Combined with their high porosities, excellent reversibility, fast kinetics, and large operating window, these defect-containing porous COPs are promising for adsorption-based cooling applications.

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Zheng, Jian, Wahiduzzaman, Mohammad, Barpaga, Dushyant, Trump, Benjamin A., Gutierrez-Tinoco, Oliver Y., Thallapally, Praveen K., Ma, Shengqian, McGrail, Bernard P., Maurin, Guillaume, Motkuri, Radha K.. 2021-08-09. Porous Covalent Organic Polymers for efficient Fluorocarbon-based Adsorption Cooling. https://doi.org/10.1002/anie.202102337

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