Differing kinds of desiccant dehumidifiers get the job done in alternative ways, but the key method they use to extract moisture from the air is possibly absorption or adsorption. Absorption occurs if the desiccant material dissolves as it's going to take humidity through the air, as is the case with https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/