Model and computation on oxygen cryosorption

Motivated by high efficiency, tiny volume and application of new pressure recovery technique of chemical oxygen iodine laser(COIL), cryosorption of oxygen is considered. From the point of view of mass conservation, a linear relation between gaseous pressure gradient and gaseous speed at which gases flow through the zeolite porous bed is obtained, and an adsorption balance equation, describing the relation of the gaseous concentrations, is established with adsorption dynamics equation. Henry relation is employed as an isothermal equation. A set of cryosorption model equations are solved numerically and the relations of oxygen concentration changing with time, and long time character of these concentrations are described. It is found that the adsorption of oxygen in porous bed of COIL develops layer by layer, and at each fixed unit of bed layer, the concentration of absorbed oxygen will rise to the balance value that matches the concentration of oxygen contained in hybrid gases after a long time.