Differing types of desiccant dehumidifiers get the job done in various ways, but the key system they use to extract moisture from the air is possibly absorption or adsorption. Absorption occurs once the desiccant compound dissolves as it requires humidity through the air, as is the case with moisture absorbers. https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/