As supplier and producing company in the adsorption field, we study diffusion phenomena both related to adsorption and in business field development. In the context of pure gas adsorption for texture characterization of porous materials we find phenomena which are easy to explain, e.g., the blockage of narrow micropores in Zeolith 4A dependent on the measuring temperature (see Fig. 1). Fig. 2 shows temperature profiles and breakthrough curves of mixed gas and vapor adsorption studies, measured with the 3P mixSorb dynamic sorption analyzer [3].