Differing kinds of desiccant dehumidifiers do the job in various ways, but the main process they use to extract humidity within the air is both absorption or adsorption. Absorption takes place if the desiccant material dissolves as it will take moisture from your air, as is the case with moisture https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/