Methanation reaction
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Methanation reaction, what is the role of the gas regulation reactor?
Reply to 1# 136902000: It seems that it’s necessary to adjust the H2/CO ratio so that it is greater than or equal to 3
How to adjust it? Isn’t the hydrogen-to-carbon ratio adjusted by controlling the CO at the outlet of the converter?
Thank you, but I still don’t understand. The hydrogen-to-carbon ratio is being adjusted in the shift converter. Is this also the principle of transformation?
The main role of the GCC is to enable non-methanation reactions to take place, such as reactions involving unsaturated hydrocarbons, dechlorination (not present in all feed gases), and deoxygenation; this ensures that methanation reactions primarily occur in the methanation reactor. Additionally, it is related to the nickel-based catalyst itself; generally, it is necessary to ensure that the temperature of the feed gas is at least as high as the activation temperature of the catalyst. Therefore, the feed gas needs to be heated, and the methods for heating include either external heating devices or the heat generated by the reaction itself. Therefore, the reactant gas is heated using the heat of reaction from the GCC gas regulator (it generally needs to be heated to around 330 degrees).
Regarding the hydrogen-to-carbon ratio you discussed, a value of around 3 is generally sufficient. However, to prevent too high levels of CO from forming during the methanation process and causing carbon deposition on the catalyst surface, the ratio needs to be higher than 3. An excess of hydrogen can be addressed by installing a carbon supplementation device after the second methanization step.
I’m sorry; the question I replied to above was incorrect – please don’t use it as a reference. I’m sorry. I will reply after organizing it
It’s not that the temperature must be no lower than the activation temperature; raising the temperature is intended to prevent carbon deposition on the surface of the catalyst
This post was last edited by lflsedin on 2013-11-19 at 18:58. When syngas enters the methanation unit, if the H/C ratio remains constant, it should be consumed in proportion during the reaction, so the H/C ratio should not change. Then why is carbon added when there is an excess of hydrogen?
What is the full English name of GCC, and does it contain catalysts? How can these things be removed? I’m quite interested.