Seeking help with methane purification
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This post was last edited by sqh-02696 on 2015-12-16 at 16:14. The gases available are as follows, with the approximate composition being: hydrogen, carbon monoxide, nitrogen, methane, oxygen, carbon dioxide – 6.77%, 2.63%, 5.07%, 56.75%, 28.77% respectively. The flow rate is around 15,000 standard cubic meters. How can methane gas with a methane content of over 93% be produced? Should it be direct pressure swing adsorption, or carbon removal followed by methanation? Hydrogen 6.77% ； Carbon monoxide 2.63% ； Nitrogen 5.07% ； Methane 56.75% ； Oxygen 0.00% ； Carbon dioxide 28.77%
This post was last edited by Sichuan Q on 2015-12-18 at 18:25. What is the pressure? This gas is similar to the components of biogas; it is necessary to consider removing impurities such as hydrogen, nitrogen, and CO
This can be implemented based on the requirements for using PSA or membrane separation; either high or low pressure can be used, depending on the overall efficiency
After a preliminary calculation, membrane separation might present some difficulties; it is recommended to consider the PSA method instead.
It’s very difficult; separating nitromethane is tough
I’m sorry, the data in the table isn’t aligned; I thought nitrogen contained 56%. Your gas source has a low nitrogen content, and PSA can handle this
The separation coefficient of CH4/N2 is relatively low, making separation difficult to achieve.