Different types of desiccant dehumidifiers operate in different ways, but the principle procedure they use to extract dampness with the air is possibly absorption or adsorption. Absorption takes place when the desiccant compound dissolves as it's going to take moisture within the air, as is the situation with moisture absorbers. https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/