吸附势理论在10K低温吸附器设计中的应用

Application of adsorption potential theory on design of a 10 K cryogenic adsorber

以氢气在活性炭中22 K、27 K、32 K、37 K、77.3 K、89 K温度下的吸附数据为基础,根据Polanyi吸附势理论得到了跟温度无关的吸附特征曲线,并利用特征曲线反推对应温度下的吸附等温线;发现吸附势理论对氢气在活性炭中临界温度以下温区较低压力下(小于0.01 MPa)吸附量的预测跟实验数据吻合较好;并根据吸附势理论得到了10 K下氢气在活性炭上较低压力下(小于0.01MPa)的吸附等温线,并设计了250 W@4.5 K氦制冷机工作于10 K温度下的吸附器。

A temperature-independent characteristic curve was obtained based on the hydrogen adsorption data of charcoal at 22 K,27 K,37 K,77. 3 K and 89 K with the help of Polanyi adsorption theory.Through the characteristic curve,the adsorption isotherms at corresponding temperature were obtained. It is found that the adsorption isotherms obtained from the adsorption potential theory agree well with the experimental data at temperature below the critical temperature and relatively low pressure（ less than 0. 01 MPa）.The adsorption isotherm of hydrogen on charcoal at 10 K was predicted by the characteristic curve and a cryogenic adsorber which works at 10 K in a 250 W@ 4. 5 K helium refrigerator was designed.