Adsorption of Ethane (С2Н6) onto a La–BTC Microporous Metal–Organic Framework Structure at High Pressures

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2025-03-26 DOI:10.1134/S2070205124702630

A. A. Pribylov, A. E. Grinchenko, A. A. Fomkin, A. V. Shkolin, I. E. Men’shchikov

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Abstract

The absolute adsorption of ethane onto a La–BTC metal–organic framework (MOF) structure, which was prepared using such a rare metal as lanthanum, was examined within a pressure range of 0.1–4 MPa at temperatures of 303.0, 313.0, 323.0, and 333.0 K. As follows from the experimental data on the adsorption of С₂Н₆ onto a La–BTC MOF obtained in the present study, the adsorption isotherms are reversible, and the amount of adsorbed molecules increased with pressure and decreased with rising temperature. The isosteres of adsorption plotted in coordinates lnP = f(1/T) at constant adsorption values are well described by linear functions at all pore fillings. The dependences of isosteric differential molar heats of ethane adsorption onto a La–BTC MOF on the value of adsorption were calculated for the studied range of temperatures. It was shown that the La–BTC MOF is a microporous adsorbent and can be employed for extracting ethane from natural gas.

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在 303.0、313.0、323.0 和 333.0 K 温度下，在 0.1-4 MPa 压力范围内，研究了乙烷在 La-BTC 金属有机框架（MOF）结构上的绝对吸附情况。从本研究获得的С2Н6 在 La-BTC MOF 上的吸附实验数据来看，吸附等温线是可逆的，吸附分子的数量随压力的增加而增加，随温度的升高而减少。在吸附值不变的情况下，以 lnP = f(1/T) 为坐标绘制的吸附等温线在所有孔隙填充情况下都能用线性函数很好地描述。在所研究的温度范围内，计算了乙烷吸附到 La-BTC MOF 上的等压差摩尔热与吸附值的关系。研究表明，La-BTC MOF 是一种微孔吸附剂，可用于从天然气中提取乙烷。

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来源期刊

Protection of Metals and Physical Chemistry of Surfaces 工程技术-冶金工程

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.