Research of Processes of Hydrogen Extraction From the Gas Mixture Formed During the Hydrogen Sulfide Decomposition

Abstract

The theoretical and experimental principles and design solutions for the technology for the extraction of hydrogen from gas mixtures formed during the decomposition of hydrogen sulfide using metal hydride technologies, allowing to obtain hydrogen of high purity and pressure, are considered. Analytical equations and dependences of the physicochemical properties of reversible metal hydrides and basic organic liquids that can be used as carriers are determined. It was determined that the enthalpy (ΔH) and entropy (ΔS) formation of metal hydrides are the most important parameters and their value determines the processes of absorption and desorption, as well as hysteresis. An experimental device has been created to study the processes of hydrogen extraction from the decomposition products of hydrogen sulfide and its compression at high pressures. A schematic diagram of a thermal sorption compressor device has been developed, which is suitable for use in industrial devices for compressing hydrogen obtained from the black sea hydrogen sulfide. The dependences of the mass fraction of hydrogen absorption in the separator sorber on the suspension temperature and its residence time in contact with the gas mixture at a pressure of 0.3 and 0.6 MPa are determined. The productivity of the process of extracting hydrogen from a gas mixture has been established. The dependences of the device productivity on the pressure of the mixture in the sorber and the pressure of hydrogen in the stripper and the temperature of the suspension are