Seeking help: Oxidation of sulfurous acid AN in ammonia-based desulfurization
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I have a question: is there anyone who is familiar with the oxidation process of hydriodic acid in ammonia-based desulfurization? How to oxidize high-concentration sulfurous acid an? Is good oxidation effective at low concentrations, and is it effective to use an oxidation fan at high concentrations? I’ve read in many technical documents that sulfuric acid an can be crystallized directly in the absorption solution; I wonder how they do it By the way, I have a question: what is the typical concentration of ammonia solution used in ammonia-based desulfurization? 5%?
It’s basically the same as wet flue gas desulfurization; forced oxidation is achieved using an oxidation blower along with a side-extending agitator, and the results are satisfactory.
This post was last edited by kingwayhorn on 2010-3-15 at 10:51. 2# Can high-concentration sulfurous acid an also be oxidized in this way? The concentration of sulfurous acid AN in the solution is approximately 2 mol/L, while that of sulfuric acid AN is about 1 mol/L.
This post was last edited by qsgd on 2010-3-9 at 14:06. 3# kingwayhorn: It is somewhat difficult to achieve high concentrations of oxidation; I look forward to insights from those with more experience
During the study*, …, what’s unclear is how the concentration can rise so high all at once
5# cyxcz Do you mean to start the oxidation from an early stage when the concentration is low? Does the presence of large amounts of sulfuric acid AN affect the oxidation of sulfurous acid AN?
The oxidation of sulfurous acid at high concentrations is very slow, and the use of oxidation fans and mixers does not yield significant results. There is little literature on high concentrations of oxidation, and the high presence of sulfuric acid also has a significant impact on oxidation.
Electrocatalytic oxidation can be used, which is effective for the oxidation of sulfite.
Many cases of ammonia-based desulfurization projects state that H2SO4·An can crystallize out of the absorption solution, and H2SO4·An is separated using a centrifuge. For sulfuric acid An to crystallize, the concentration needs to be at least 40%, so how do they carry out the oxidation then? Is it just bragging?
Direct current? What are the voltage and current? Is it expensive? Are there any relevant materials?
High-concentration sulfuric acid AN isn’t just hype; it is obtained by evaporating the water from a low-concentration sulfuric acid AN solution to achieve concentration