Abstract
Temperature swing adsorption (TSA) technology plays an important role in industrial gas capture, but the temperature swing procedure consumes a huge amount of energy, which takes over 80% of the total energy consumed. In this work, we report a C2H6-selective temperature swing system completely driven by solar irradiation. For adsorption, the adsorbent is placed under a layer of poly(vinylidenefluoride-co-hexafluoropropene) [P(VdF-HFP)HP] which can reflect sunlight and radiate heat to outer space, thus efficiently decreasing adsorption temperature under light irradiation. While desorption, the adsorbent is placed above P(VdF-HFP)HP and directly heated by sunlight, leading to the liberation of C2H6 adsorbed. The whole temperature-swing process do not need any energy input other than solar energy. The metal–organic framework (MOF), Ni(bdc)(ted)0.5, is selected as the adsorbent because of its high working capacity and easy regeneration. This zero-energy-consumption temperature swing system shows stable performance in the repeated C2H6 adsorption–desorption tests for 5 months. The present work sheds light on the development of energy-efficient TSA technologies for the capture of light hydrocarbons.
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