Differing kinds of desiccant dehumidifiers function in alternative ways, but the main approach they use to extract humidity with the air is possibly absorption or adsorption. Absorption happens if the desiccant substance dissolves as it requires humidity from the air, as is the case with dampness absorbers. In addition, this https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/