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Adsorption Refrigeration Performance of Shaped MIL-101-Water Working Pair

机译:异型MIL-101-水工作对的吸附制冷性能

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摘要

A new metal-organic framework of MIL-101 was synthesized by hydrothermal method and the powder prepared was pressed into a desired shape. The effects of molding on specific surface area and pore structure were investigated using a nitrogen adsorption method. The water adsorption isotherms were obtained by high vacuum gravimetric method, the desorption temperature of water on shaped MIL-101 was measured by thermo gravimetric analyzer, and the adsorption refrigeration performance of shaped MIL-101-water working pair was studied on the simulation device of adsorption refrigeration cycle system. The results indicate that an apparent hysteresis loop ap-pears in the nitrogen adsorption/desorption isotherms when the forming pressure is 10 MPa. The equilibrium ad-sorption capacity of water is up to 0.95 kg·kg-1 at the forming pressure of 3 MPa (MIL-101-3). The desorption peak temperature of water on MIL-101-3 is 82 °C, which is 7 °C lower than that of silica gel, and the desorption temperature is no more than 100 °C. At the evaporation temperature of 10 °C, the refrigeration capacity of MIL-101-3-water is 1059 kJ·kg-1, which is 2.24 times higher than that of silica gel-water working pair. Thus MIL-101-water working pair presents an excellent adsorption refrigeration performance.
机译:通过水热法合成了一种新的MIL-101金属有机骨架,并将制备的粉末压制成所需的形状。使用氮气吸附法研究了成型对比表面积和孔结构的影响。采用高真空重量法获得吸水等温线,用热重分析仪测定水在MIL-101形上的解吸温度,并在MIL-101型水工对的模拟装置上研究其吸附制冷性能。吸附式制冷循环系统。结果表明,当成形压力为10 MPa时,氮的吸附/解吸等温线出现明显的磁滞回线。在3 MPa的成型压力下(MIL-101-3),水的平衡吸附容量高达0.95 kg·kg-1。 MIL-101-3上水的解吸峰温度为82°C,比硅胶低7°C,并且解吸温度不超过100°C。在10°C的蒸发温度下,MIL-101-3-水的制冷量为1059 kJ·kg-1,是硅胶-水工作对的制冷量的2.24倍。因此,MIL-101-水工作对具有出色的吸附制冷性能。

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