Different types of desiccant dehumidifiers do the job in different ways, but the main process they use to extract humidity through the air is either absorption or adsorption. Absorption occurs when the desiccant material dissolves as it will take humidity with the air, as is the case with humidity absorbers. https://wildbookmarks.com/story21002700/desiccant-dehumidifiers-in-cold-stores-an-overview