Differing kinds of desiccant dehumidifiers function in alternative ways, but the primary course of action they use to extract moisture from your air is possibly absorption or adsorption. Absorption takes place once the desiccant material dissolves as it takes dampness with the air, as is the situation with moisture absorbers. https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/