Can 30% caustic soda be used to replace soda ash in the alkali washing desulfurization of semi-water gas? Why or why not?
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Can 30% caustic soda be used to replace soda ash in the alkali washing desulfurization of semi-water gas? Why or why not?
The pH value of sodium hydroxide has exceeded 12; it definitely won’t work.
To add further, the formation of double salts is closely related to the pH value; the higher the pH value, the faster the formation rate of double salts. In some plants, sodium hydroxide is added to adjust the total alkalinity when it fails to increase. However, improper control of the addition amount leads to blockage of the tower due to double salt formation.
Mixed alkali, namely Na2CO3 + NaOH, can be used for desulfurization; however, the ratio between the two must be adjusted appropriately
This post was last edited by chen-jun-1024 on 2010-10-8 at 09:35. Currently, there are many industrial applications that utilize the mixed-alkali method for desulfurization; you can look up relevant information on this topic
During the learning process, the ZFG-L type multi-unit pipe filtration system is also used for filtration in the desulfurization process
We currently use caustic soda to remove hydrogen sulfide, but there are black precipitates in the circulating liquid. Is it iron sulfide?