CO2 requirements when producing soda ash
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This post was last posted by mkp369 on 2013-11-14 09:38 Editor: Our unit is a methanol production unit. The CO2 content in the low-temperature methanol wash tail gas of the gas purification station is about 80%, nitrogen is close to 20%, H2S (including COS) can be controlled within 50PPM, the methanol content is less than 500PPM, and the moisture is 0.2%. Since our unit is adjacent to a joint alkali plant, I want to transport the tail gas to the joint alkali plant for it to make soda ash. I don’t know the CO2 requirements when producing soda ash. Can the above tail gas meet the joint alkali requirements?
I don’t know, I’m passing by and can help the original poster.
You can directly contact your neighboring soda ash plant. They know whether your gas meets their production requirements. However, I feel that the concentration of the lower gas is a bit low and contains other ingredients that are detrimental to soda ash production.
It doesn't matter, it can be used, as long as the oxygen content does not exceed the standard, the hydrogen sulfide will decompose when heated, but can the joint alkali plant want it? They have high concentrations of carbon dioxide themselves, why do they need yours? The carbon dioxide in the joint alkali plant is basically balanced. Unless it is supporting the production of baking soda, the carbon dioxide gas is not enough.
Okay, how much is the amount? Hydrogen sulfide seems to be harmful?
Others will want it if it is so low. Our joint alkali cannot be lower than 90%. Low carbon dioxide concentration has a great impact on the crystallization of the carbonization tower. The crystals that come out are too fine. Unless they are too short of carbon dioxide gas, no one will want it. 80% is too low.
Can carbon dioxide from power plants be used to produce soda ash? In this way, carbon dioxide emissions can be reduced!
Baking soda is available. About 40% of the baking soda gas is enough.
In the past, we had online concentration detection on the lower and middle gas pipelines of CO2 compression to remove heavy alkali, but we have forgotten the specific parameters. It should be usable. But what do you do with this product that contains H2S and COS? How big is the impact?