MIL-101(Cr)开式吸附性能实验

采用水热合成法制备水热稳定金属有机骨架MIL-101(Cr)，基于太阳能吸附式空气取水选取不同的实验工况，将MIL-101(Cr)、细孔硅胶作为研究对象，相对湿度控制在50%、温度范围5～45℃条件下，测试并对比了MIL-101(Cr)与细孔硅胶的吸附性能。实验表明，35℃、50%RH条件下，吸附过程进行1000min，MIL-101(Cr)水吸附量为22.05g/100g，其吸附量相比细孔硅胶提高93%左右；当系统平衡时，MIL-101(Cr)有效平均吸附速率相比细孔硅胶提高120%左右。此外，在相对湿度（RH）50%、温度范围5～45℃条件下，MIL-101(Cr)的平衡吸附量在11.40～23.47g/100g之间。在所控温度下，MIL-101(Cr)在25℃时平衡吸附量最大，在5℃时平衡吸附量最小，25℃时MIL-101(Cr)的平衡吸附量相比5℃时提高106%左右。该实验可以为四季工况不同温度下MIL-101(Cr)用于太阳能吸附式空气取水提供基础数据。

Research on the open adsorption property of MIL-101(Cr)

The hydrothermal stable metal-organic framework MIL-101(Cr) was directly synthesized by hydrothermal method. Different experimental conditions were taken based on solar adsorption extracting water from air. The adsorption performance of MIL-101(Cr) was tested and compared to that of the micro-pore silica gel under the condition of open adsorption. The effects of temperature on the adsorption property were tested in the range of 5—45℃ and under the equal relative humidity 50%.The experimental results show that at temperature of 35℃ and relative humidity of 50%, the adsorption capacity of MIL-101(Cr) was 22.05g/100g within 1000minutes, an increase of 93% compared to that of the micro-pore silica gel. And the effective average equilibrium adsorption rate of MIL-101(Cr) was increased by 120% compared to the silica gel . In addition, in the environment with relative humidity 50%, temperature range of 5—45℃, the equilibrium adsorption capacity of MIL-101 (Cr) was among 11.40—23.47g/100g. The equilibrium adsorption capacity of MIL-101 (Cr) was the highest at 25℃, and the minimum was at 5℃.The value at 25℃ was about 106% higher than that at 5℃. This experiment can provide basic data for the usage of MIL-101(Cr) in solar adsorption extracting water from air at all seasons.