The results from a study of the removal of gaseous hydrogen chloride by the solid, metal organic complex, chromium oxinate, in a fixed-bed adsorption column is presented in the form of adsorption curves or exit gas concentration histories. These experimental curves are subsequently compared to the solutions of a theoretical mathematical model representing the adsorption process. The model incorporates axial diffusion, as described by G. I. Taylor. A gas phase mass-transfer resistance and a solid-phase adsorption-desorption rate were considered as the mechanisms for the adsorption model. The solutions to the mathematical model were generated by an analog computer.