On the Implementation of a Dynamic Sorption Mode on Selectively Permeable Microspheres for Helium Recovery

Abstract

The work is devoted to preliminary studies of the membrane-sorption method of gas separation in the dynamic mode. To study and analyze this gas separation mode, it is necessary to create a special experimental stand and measuring equipment that allows obtaining information on changes in the concentration of components in the gas mixture directly during the experiment. To measure the concentration during the experiment, a concentration sensor for binary gas mixtures developed at ITAM SB RAS based on the hot-wire anemometric method was used. The concentration sensor was tested and calibration dependencies for the air-helium mixture were obtained, a technique for measuring the concentration of components in the gas mixture directly during the experiment was developed. The response time of the sensor to a step change in the helium concentration in the mixture was less than 0.4 seconds. Experiments were conducted to model the dynamic sorption mode during the flow of a helium-containing mixture through a selectively permeable layer of silica microspheres. Based on the experiment results, recommendations were given for preparing a stand for dynamic gas separation based on the membrane-sorption method.