Source of sodium carbonate in the acetylene neutralization tower
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Gentlemen, a sodium hydroxide concentration of 3%-15% is used in the acetylene neutralization tower, and the criterion for replacing the base is when the sodium carbonate level exceeds 10%. So here comes the question: according to the reaction equation, no CO2 is produced during the entire reaction process of calcium carbide. The role of the acetylene neutralization tower as described in the literature is to remove impurities such as sulfuric acid and phosphoric acid that are formed in the purification tower. Therefore, I want to ask where sodium carbonate comes from in this neutralization tower, and why it is used as a criterion for determining when to replace the alkali. I would appreciate your advice
The alkali solution already contains a certain amount of sodium carbonate, and air may also get mixed in
During the calcium carbide production process, a large amount of carbon dioxide gas is trapped within the calcium carbide; this is the main issue. Additionally, carbon dioxide may be generated in the acetylene system (though there is no relevant literature to support this)