The effect of CO2 on methanol synthesis
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What is the significance of the reaction in which carbon dioxide is used to synthesize methanol while water is produced as a byproduct, for the synthesis of methanol? What is its purpose? Can we do without it?
(1) From the reaction equation, CO2 can also participate in the reaction to produce methanol. The synthesis of methanol from CO2 generates 1 molecule of H2O, which thus increases the steam consumption required for methanol distillation. (2) The presence of CO2 inhibits the formation of dimethyl ether to a certain extent. Since dimethyl ether is the product of the dehydration reaction of 2 molecules of methanol, the reaction between CO2 and H2 to produce methanol generates 1 molecule of H2O, and the presence of H2O plays a positive role in suppressing the dehydration of methanol to form dimethyl ether. (3) It prevents CO from being converted into CO2, a reaction that occurs in the presence of H2O. (4) It is more effective at regulating temperature, preventing overheating, preserving the activity of copper-based catalysts, and extending their service life. (5) It can prevent catalyst carbonization. Therefore, the CO2 content in the feed gas is generally kept at around 3%.
Regulate the bed temperature to prevent overheating, suppress side reactions, and protect the catalyst.
654262293 鍙戣 〃 beach
654262293 鍙戣 〃 beach
Could you explain the principle by which carbon dioxide prevents carbon buildup on catalysts?