The chemical absorption of amine solution is exothermic and reversible because of its low cost, reusability, high carbon capture efficiency and good thermal stability. The higher the temperature, the greater the reversal of the reaction. Therefore, in the high temperature system, the lower carbon dioxide absorption efficiency will make the amine solution samples commonly used in this process dissolve monoethanolamine (MEA), diethanolamine (DMA) and methane.<br>The mechanism of absorption of carbon dioxide by monoethanolamine was studied. The main reaction is Zwitterion, which is divided into two parts: one is that carbon dioxide generates ion exchange molecules, the other is that it reacts with monoethanolamine, and the fifth is the equation of absorption of carbon dioxide by monoethanolamine solution, which is called MEAH+CO- or "carbamate", and then one molecule of methyl carbonate is formed.
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