零长柱法测定金属有机框架吸附剂中有机溶剂的晶内扩散系数

IF 1.7 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Russian Chemical Bulletin Pub Date : 2024-10-26 DOI:10.1007/s11172-024-4368-6

Feng Xue, Chen Chu, Chen Zhang, Xuechao Gao, Shengui Ju

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引用次数: 0

摘要

为了研究金属有机框架（MOFs）对溶剂的吸附，我们组装了一套特殊的装置。在不同载气（N2）流速下测量了溶剂分子的动力学解吸曲线，仪器误差在一定范围内。可以通过吸附剂在 MOFs 内部孔隙中的传输来充分描述解吸过程。对于 MOF 样品 NH2-MIL-101(Fe)、HKUST-1、MIL-101(Cr)、ZiF-67 和 ZIF-8，计算了乙醇、甲苯和丙-2-醇在 25、35 和 45 °C 下的晶间扩散系数，并评估了活化能。所获得的扩散数据与之前报告的数据一致。

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Determination of intracrystalline diffusion coefficient of organic solvents in metal organic framework adsorbents by zero-length column method

A special setup was assembled to study solvent adsorption by metal organic frameworks (MOFs). A blank test was run to examine the noise level and the kinetic desorption curves for solvent molecules under different carrier gas (N₂) flow rates were measured with the instrument error lying within a limited range. The desorption process could be adequately characterized by the transport of adsorbates in pores within MOFs. For the MOF samples NH₂-MIL-101(Fe), HKUST-1, MIL-101(Cr), ZiF-67, and ZIF-8, the intercrystalline diffusion coefficient of ethanol, toluene, and propan-2-ol at 25, 35, and 45 °C were calculated and the activation energy was evaluated. The diffusion data obtained are in agreement with those reported earlier.

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来源期刊

Russian Chemical Bulletin 化学-化学综合

CiteScore

2.70

自引率

47.10%

发文量

257

审稿时长

3-8 weeks

期刊介绍： Publishing nearly 500 original articles a year, by leading Scientists from Russia and throughout the world, Russian Chemical Bulletin is a prominent international journal. The coverage of the journal spans practically all areas of fundamental chemical research and is presented in five sections: General and Inorganic Chemistry; Physical Chemistry; Organic Chemistry; Organometallic Chemistry; Chemistry of Natural Compounds and Bioorganic Chemistry.