Different types of desiccant dehumidifiers get the job done in various ways, but the key system they use to extract moisture with the air is either absorption or adsorption. Absorption happens if the desiccant compound dissolves as it will take dampness with the air, as is the case with dampness https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/