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The granular nanoporous carbon medium, made of the cylindrical coal granulesof the adsorbent of SKT 3, at an influence by the high pressures from 1MPa to3GPa has been researched. The eight consecutive stages of the materialsspecific volume change, which is characterized by a certain dependence of thevolume change on the pressure change, have been registered. It is shown thatthere is a linear dependence on the double log log plot of the materialsspecific volume change on the pressure for an every stage of consideredprocess. The two stages are clearly distinguished such as a stage of materialsmechanical destruction, and a stage of elastic compression of material withoutthe disintegration of structure at a nanscale. The hysteresis dependence of thematerials specific volume change on the pressure change at the pressuredecrease is observed. The small disperse coal dust particles jettisoningbetween the high pressure cell and the base plate was observed, resulting inthe elastic stress reduction in relation to the small disperse coal dustparticles volume. The obtained research data can be used to improve the designsof air filters for the radioactive chemical elements absorption at the NPP withthe aims to protect the environment.

Stages of destruction and elastic compression of granular nanoporous carbon medium at high pressures