Desiccant


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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 ?
The paper provides performance data, including adsorption characteristics according to MIL-D-3464 and DIN 55473, for desiccants in the most common packaging applications.
The new stoppers are produced to the same specification and amount of desiccant as the existing stoppers, so additional stability data is not required.
If the hoses become frayed and begin leaking air, then high-humidity ambient air may be drawn into the drying system, which will quickly overload the limited capacity of the desiccant, resulting in a poor dewpoint.
In direct-contact liquid desiccant systems, internally cooled dehumidifiers have been proposed and studied by several researchers (Bansal et al.
In this article, a heat pump-driven two-stage desiccant wheel system (HPTW) is proposed.
Again, there are a variety of desiccant types, so search FED LOG using the part number MIL-D-3464.
Sorbead India boasts manufacture of high quality silica desiccants
These Dryers are proven to be far more responsive than traditional twin desiccant dryers, continually adjusting every six minutes to changing material circumstances instead of parameters being fixed for the entire drying cycle.
Conventional desiccant dryers have a large thermal mass, and regeneration demands large amounts of energy.
In the case of consumer products, Scoop Neck desiccant scoops with remain with the product, and, unlike desiccant packets, they cannot be mistakenly poured into a drink or blender.
Superdry container desiccant absorbs 200% its own weight in moisture to maintain a low humidity in shipping containers and prevent condensation damage to cargo.
The basic configuration of a liquid desiccant dehumidification system is illustrated in Figure 1.