Abstract
Shaped MIL-101 and ethanol were selected as a working pair for adsorption refrigeration in this work. The adsorption isotherm of ethanol on shaped MIL-101 (MIL-101-3) was obtained by high vacuum gravimetric method. The desorption performance of ethanol on MIL-101-3 was measured by Thermo Gravimetric Analyzer. The adsorption refrigeration performance and cyclic adsorption stability of MIL-101-3–ethanol were investigated on the simulation device of adsorption refrigeration. The results show: (1) the equilibrium adsorption capacity of ethanol on MIL-101 is 0.74 kg/kg at 25 °C. (2) The desorption peak temperature of ethanol on MIL-101-3 is 54.0 °C, and temperature of complete desorption is about 100 °C. (3) At the desorption temperature of 80 °C, the refrigeration capacity of MIL-101-3–ethanol working pair reaches 283 kJ/kg, which is 2.2 times as much as that of activated carbon–ethanol. (4) MIL-101-3 shows no significant reduction of ethanol uptake after 60 cycles, and the Brunauer−Emmett−Teller (BET) surface area only decreases by 3.3%.
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