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Desiccant |
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desiccant [′des·i·kənt]
(chemistry) 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. 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. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | Stirring up the bedbugs by spraying their environment with synthetic versions of their alarm (as opposed to reproductive) pheromones makes them more likely to walk through agents called desiccant dusts, which make the bugs highly susceptible to dehydration. will show the Luxor 50 (50 m3/hr airflow capacity) model in its new beside-the-press series of twin-bed desiccant dryers. It is important to note that the purpose of this section is not to demonstrate the performance of a desiccant drying system including the energy required to regenerate the desiccant but to demonstrate the heat and moisture transfer characteristics of a moving porous bed exchanger and demonstrate the reliability of the numerical model. |
Desiccant |
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