Methodology of high-temperature analysis of material properties under high pressure conditions for studying the sorption properties of materials

Abstract

This article presents a methodology for applying high-pressure high-temperature volumetric analysis (HPVA) to investigate the sorption properties of a wide range of materials. The HPVA method enables precise measurement of gas adsorption and desorption (e.g., hydrogen, carbon dioxide, or hydrocarbon mixtures) under various temperature and pressure regimes, including both standard
and extreme conditions. Such measurements are critically important for evaluating materials used in advanced fields such as hydrogen storage, carbon dioxide capture and processing, and catalytic chemical reactions. The application of HPVA provides quantitative data on sorption capacity, as well as information under conditions closely approximating the actual kinetics of gas molecules interacting with the surface and internal pores of the materials. The article thoroughly examines key stages of the HPVA methodology:
the preliminary degassing and moisture removal process, including the preparation of samples for experimental analysis; the setup and calibration of equipment under high-temperature and highpressure conditions; and the data processing algorithms that make it possible to determine fundamental parameters of porous structures (pore volume, pore size distribution, sorption capacity). The results obtained have practical significance for the development of novel high-performance sorbents, catalysts,
and nanostructured materials for energy resource storage, thereby further expanding opportunities for creating environmentally friendly and economically viable technologies.