High Pressures Gas Adsorption in Porous Media and Polymeric Membrane Materials

IF 2 Q4 CHEMISTRY, PHYSICAL Membranes and Membrane Technologies Pub Date : 2022-12-26 DOI:10.1134/S2517751622070022

S. E. Sokolov, V. V. Volkov

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Abstract—

The current state and future development of the energy industry dictate the need to use natural gas as a more environmentally friendly fossil fuel and to make a smooth transition to hydrogen energy. In this regard, adsorption at elevated pressures (>10 MPa) has been actively studied in recent decades to solve problems such as the extraction of natural gas from deep underground deposits and its further membrane purification, as well as the selection of adsorbents for the accumulation of methane and hydrogen. However, the correct determination of adsorption values at elevated pressures faces a number of problems that are not typical for moderate pressures. The main difficulties here are the correct determination of the skeletal volume of the adsorbent and the volume of the adsorbate. In the case of amorphous adsorbents, the swelling of the sample induced by sorption and its compressibility must also be taken into account. This review discusses recent advances in the description of gas adsorption at high pressures in porous media and membrane polymeric materials, including the specific conditions of contact with supercritical carbon dioxide. The paper also gives brief descriptions of the adsorption values used (net, excess, and absolute adsorption), as well as experimental methods for measuring adsorption at high pressures.

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高压气体在多孔介质和高分子膜材料中的吸附

摘要:能源工业的现状和未来发展决定了需要使用天然气作为更环保的化石燃料，并顺利过渡到氢能源。在这方面，近几十年来，人们积极研究高压吸附(>10 MPa)，以解决深层地下沉积物中天然气的开采及其进一步的膜净化，以及甲烷和氢气富集吸附剂的选择等问题。然而，在高压下正确测定吸附值所面临的一些问题在中等压力下并不常见。这里的主要困难是正确测定吸附剂的骨架体积和吸附剂的体积。在非晶吸附剂的情况下，还必须考虑由吸附引起的样品膨胀及其可压缩性。本文综述了近年来多孔介质和膜高分子材料中高压气体吸附的研究进展，包括与超临界二氧化碳接触的具体条件。本文还简要介绍了所使用的吸附值(净、过量和绝对吸附)，以及在高压下测量吸附的实验方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.