Why are alcohol amines used for dry gas desulfurization?
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Organic weak bases are used in wet desulfurization of dry gas; why are alcohol amines used in this process? Can’t other types of amines be used, as their effectiveness is still poor? Is there any relevant material? Thank you. . .
Alcohol amines are commonly used nowadays, as their molecular formula is OH-R-NH3; the hydroxyl group reduces the vapor pressure and increases water solubility, while the amino group provides weak basicity, thereby enhancing the absorption of acidic gases. N-dimethylethanolamine is commonly used among alcohol amines. Generally speaking, selecting an excellent desulfurizing agent should involve the following properties: 1. Strong absorption capacity, that is, good performance ； 2. It has stable chemical properties and is not prone to decomposition ； 3. Strong thermal stability ； 4. The desulfurizer is easy to regenerate, has a high regeneration rate, and experiences low loss even during use ； In addition, a better desulfurizing agent is sulfolane.