Desiccant Chemical Adsorption
May 08, 2020
1. Acidic desiccant: concentrated sulfuric acid, phosphorus pentoxide, used to dry acidic or neutral gases, of which concentrated sulfuric acid cannot dry hydrogen sulfide, hydrogen bromide, hydrogen iodide and strong reducing acidic gases; phosphorus pentoxide Can not dry ammonia
2. Neutral desiccant: anhydrous calcium chloride, general gas can be dried, but anhydrous calcium chloride can not dry ammonia and ethanol;
3. Alkaline desiccant: soda lime (a mixture of CaO and NaOH, KOH), quicklime (CaO), NaOH solid, used to dry neutral or alkaline gases.
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