A robust large-pore zirconium carboxylate metal–organic framework for energy-efficient water-sorption-driven refrigeration

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A Robust Energy-Efficient Metal-Organic Framework Adsorbent for Refrigeration, Nature Energy  (2018)

 

Global energy consumption for heating and cooling in residential areas has increased steadily during the past decades and is forecast to accelerate in the coming years, especially for cooling purposes. The current systems and adsorbents used in heating and cooling processes rely mainly on non-sustainable energy resources and this is strongly against the recent global agreement that aims to reduce the energy generated by fossil fuels. Therefore, the development of alternative materials and systems that involve clean and renewable energy resources has attracted considerable attention over the past few years. Among them, green adsorptiondriven heat pumps and chillers have aroused a great interest. They exhibit many advantages, which include the use of clean energy sources, such as solar and industrial waste heat, low driving and regeneration temperatures and the involvement of environmentally friendly working fluids, such as water and ethanol.

 

 

In comparison with other commercial benchmark compounds and previously reported MOFs used for this application, MIP-200 displays superior water-sorption properties with an S-shaped isotherm, a high uptake of water below P/P0 = 0.25, facile regeneration, stable cycling and, most importantly, a notably high COP for refrigeration at a low driving temperature. In addition, MIP-200 features a scalable synthesis that involves simple and green chemicals. Combined with its outstanding chemical and mechanical stability, MIP-200 appears to be a promising candidate for adsorption-driven refrigeration that is compatible with the shaping process required for largescale utilization. This work provides the promise to develop highly stable MOFs for applications in next-generation adsorption-driven chillers, heat pumps and dehumidifiers and achieve a more efficient energy consumption.

 

Consultez le communiqué de presse associé à cet article : Un solide nanoporeux pour une réfrigération plus efficace

 

Nature Energy 2018

 

The discovery of more-efficient and stable water adsorbents for adsorption-driven chillers for cooling applications remains a challenge due to the low working capacity of water sorption, high regeneration temperature, low energy efficiency under given operating conditions and the toxicity risk of harmful working fluids for the state-of-the-art sorbents. Here we report the water-sorption properties of a porous zirconium carboxylate metal–organic framework, MIP-200, which features S-shaped sorption isotherms, a high water uptake of 0.39 g g−1below P/P0 = 0.25, facile regeneration and stable cycling, and most importantly a notably high coefficient of performance of 0.78 for refrigeration at a low driving temperature (below 70 °C). A joint computational–experimental approach supports that MIP-200 may be a practical alternative to the current commercially available adsorbents for refrigeration when its water adsorption performance is combined with advantages such as the exceptional chemical and mechanical stability and the scalable synthesis that involves simple, cheap and green chemicals.

 

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A Robust Energy-Efficient Metal-Organic Framework Adsorbent for Refrigeration

 

Sujing Wang, Ji Sun Lee, Mohammad Wahiduzzaman, Jaedeuk Park, Mégane Muschi, Charlotte Martineau-Corcos, Antoine Tissot, Kyung Ho Cho, Jérôme Marrot, William Shepard, Guillaume Maurin*, Jong-San Chang*, and Christian Serre*

 

Nature Energy 2018

 

DOI: 10.1038/s41560-018-0261-6