Desiccant


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Desiccant: desiccant bags

desiccant

[′des·i·kənt]
(chemistry)

Desiccant

 

(or drying agent), a liquid or solid that takes up moisture, used for drying gases, liquids and, more rarely, solids. Desiccants are divided into three major groups: (1) water-adsorbing desiccants, (2) desiccants that form hydrates with water, and (3) desiccants that form other chemical compounds with water. The first group includes aluminum oxide, silica gel, and other adsorbents; the second group comprises certain anhydrous salts and fused hydroxides; and the third group includes metallic sodium and calcium, calcium oxide, and phosphorus pentoxide. The state of aggregation of the substance to be dried, the moisture content of the substance, and the drying conditions determine the selection of a particular desiccant. It is absolutely essential that the desiccant does not react with the substance to be dried.

desiccant

Any absorbent or adsorbent, liquid or solid, that will remove water or water vapor from a material. In a refrigeration circuit, the desiccant should be insoluble in the refrigerant.
References in periodicals archive ?
Based on type, the global desiccants and adsorbents market can be segmented into molecular sieves, activated alumina, activated carbon, silica gel, ceramic balls, and tabular alumina.
Resins such as PET, nylons, PBT and some others can give off significant amounts of these, over time, and they can contaminate and destroy desiccant.
t] is calculated by the product of the enthalpy variance of the processed air through the desiccant handling processor and the mass flow rate of the processed air ([[?
High desiccant reactivation temperatures improve desiccant reactivation and adsorption.
For the desiccant insertion into securitainers, a slide escapement was used.
The second, much larger time constant appears to be a consequence of the water vapor's very slow effective diffusion toward and saturation of the layers of desiccant coating particles closest to the aluminum film, while the first time constant is more representative of the effective diffusion in the particle layers in the middle and closer to the air-particle interface when a large number of data are used in the correlation.
Typical desiccant systems use a rotating desiccant wheel.
Since the dryer can be regenerated with natural gas or steam, the desiccant method of moisture removal is reportedly less costly than refrigerant drying systems.
MIAMI -- Advantix Systems, providers of dehumidification and cooling systems using liquid desiccant technology, today announced its DuCool line of products as an optimum solution for the food processing industry.
Check and Replace Desiccant--Poorly performing desiccant can also increase energy usage because it does not absorb moisture as readily as it should nor does it regenerate as quickly so process times increase--using more energy or poor product is produced which also represents wasted energy.
The AdPack desiccant pillow packs are designed for the protection of moisture-sensitive pharmaceuticals such as tablets and capsules inside the packaging.