CO2 control methods for air separation molecular sieves
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Hello, everyone. I’m really troubled by the unstable operation of our unit’s system. Every winter, at the beginning of spring, the CO2 level at the inlet of the air separation compressors is high; it remains high throughout that period, usually ranging between 800 and 1500. Could some experts discuss this issue from the perspectives of design, process engineering, or the molecular sieves themselves? What strategies do you have to deal with this problem? Thank you. I am a beginner; please forgive me if my explanation is not perfect.
Isn’t CO2 measurement usually done at the outlet of the molecular sieve? I’m not sure what the unit of measurement is; is there a graph showing the changes in CO2?
The poster’s unit is a standard one; according to the specifications, carbon dioxide detectors should be installed at both the inlet and outlet of the molecular sieve. However, in practice, such detectors are usually placed at the outlet of the molecular sieve, not at the inlet. There are many reasons for the increase in carbon dioxide levels. First, it is necessary to check whether there are significant fluctuations in the amount of carbon dioxide in the air. Next, one should examine the causes of these fluctuations. Generally speaking, normal levels of carbon dioxide in the air do not fluctuate greatly; rather, such fluctuations are caused by other factors, such as processes that generate large amounts of carbon dioxide, or processes that absorb other gases, or processes that emit carbon dioxide. Full consideration must be given to factors such as the space available at the intake opening, as well as the placement and wind direction of various exhaust openings.
Due to changes in the atmospheric environment, the carbon dioxide concentration in the air has increased. Currently, molecular sieves are being continuously improved to enhance their CO2 adsorption capacity; it is possible to communicate directly with the manufacturers of molecular sieves, who can calculate the removal efficiency and then recommend a suitable model!