Differing types of desiccant dehumidifiers operate in alternative ways, but the main approach they use to extract dampness through the air is either absorption or adsorption. Absorption takes place in the event the desiccant compound dissolves as it will require dampness from your air, as is the case with humidity https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/