Abstract: Cryosorption of oxygen produced in chemical oxygen iodine laser(COIL) is considered. From the view point of mass conservation, a linear relation between gas pressure gradient and gas velocity is used with which gases flows through a zeolite porous bed is obtained. An adsorption balance equation, describing relation of components in gas flow and adsorped components,is established with adsorption dynamics equation. Henry relation is employed as isothermal equation. A set of cryosorption model equations is solved numerically. Oxygen concentration evolution,and long time character of concentrations are given.

Key words: cryosorption, porous material, COIL, numerical computation