Using an advanced cryogenic thermal desorption spectroscopy (ACTDS) apparatus together with the temperature-programmed desorption (TPD) methodology, three MOF materials with different textural characteristics were examined for the separation of an equimolar H₂/D₂ mixture through quantum sieving. Finally, a universal fundamental correlation between the separation performance of (equilibrium) quantum sieving and pore size with temperature is established, which, for specific pore apertures, results in a subordinate local optimal operational temperature (LOOT) phenomenon that is dominant at local temperatures; the influence of the textural characteristics of different materials on this correlation is also illustrated in detail and clearly demonstrates that a good material for efficient H₂/D₂ quantum sieving should possess homogeneous hydrophilic pores with only one strong adsorption site. These results will exert great directive significance on defining the optimal operational conditions and suitable materials for more effective H₂/D₂ quantum sieving performance in a practical way.

中文翻译：

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MOF中H2 / D2的量子筛分：分离性能，孔径和温度之间的相关性研究

使用先进的低温热脱附光谱仪（ACTDS）装置和程序升温脱附（TPD）方法，对三种具有不同结构特征的MOF材料进行了量子筛分，以分离等摩尔H ₂ / D ₂混合物。最后，建立了（平衡）量子筛分分离性能和孔径随温度之间的通用基本相关性，对于特定的孔径，会导致次要的局部最佳操作温度（LOOT）现象，该现象在局部温度下占主导地位；还详细说明了不同材料的质地特性对这种相关性的影响，并清楚地表明了一种用于高效H₂ / D ₂量子筛应具有均一的亲水孔，且只有一个强吸附位。这些结果将对确定最佳操作条件和合适的材料以实用的方式更有效的H ₂ / D ₂量子筛分性能具有重要的指导意义。