The absorption of H2S is primarily accomplished by Na2CO3; what role does PDS play in desulfurization, or what reactions does it undergo?
Thread Content
In the desulfurization process, the absorption of H2S is primarily achieved using Na2CO3. What role or reaction does PDS play in desulfurization?
PDS has a strong oxygen-carrying capacity, which facilitates the regeneration of alkali in the desulfurization solution, thereby ensuring effective desulfurization
In the wet desulfurization solution, there are three components: one is the absorbent, the second is the oxygen carrier, and the third is the catalyst. Desulfurization also involves three steps: the first is oxygen absorption (performed by oxygen-containing agents in the nozzle; of course, regeneration is also involved) ； The second is absorption (completed by the absorbent in the desulfurization tower), and the third is regeneration (completed in the desulfurization tower or in the rich liquid tank, catalyzed by vanadium catalysts). Many people think that the third step mainly takes place in the nozzle downcomer, but in fact it primarily occurs within the desulfurization tower or the liquid-rich tank. Its oxygen is supplied by oxygen-bearing substances (such as PDS, tannins, etc.). If it is completed in the nozzle, the composition of the by-product salts will be very high.