Methods and criteria for the evaluation and characterization of specific acting adsorbents are introduced. The results of the investigation are used to verify a new multivariate cluster analysis tool. Hence, in contrast to common screening procedures, the expenditure of time and effort for choosing optimized adsorbents can be minimized. The importance of the adsorption of water vapor and the possibilities to influence the adsorbents by modifications are presented. Finally, the economic and technical advantages of adsorption for exhaust air treatment within the food-processing industry are discussed.