What should the carbon-to-carbon ratio be for methanol synthesis?
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What should the carbon-to-carbon ratio be for methanol synthesis? (Copper-based catalysts)
Is it the hydrogen-to-carbon ratio? In general methanol synthesis, the hydrogen-to-carbon ratio of the feed gas is 2.05–2.15
Generally, only fresh gas with a hydrogen-to-carbon ratio of 2.05–2.15 is used; the amount of hydrogen is relatively low, and it can be supplemented by adjusting the composition and removing or adding carbon dioxide. Generally, the carbon-carbon ratio is high; those below 1 are less common. Values that are too low are more suitable for ammonia synthesis.
Please explain in detail whether the carbon-to-carbon ratio of the synthesis varies depending on the manufacturing process. Looking forward to your answer
The carbon-to-carbon ratio generally refers to the ratio of carbon monoxide to carbon dioxide; in most cases, the carbon dioxide level is required to be no less than 1.5, and it may even be higher than 2.5. It also indirectly indicates the carbon-to-carbon ratio. The high water-to-carbon ratio resulting from hydrocarbon conversion leads to high levels of carbon dioxide, but carbon dioxide is not beneficial for synthesis; its level should not be too high.
As is well known, the main reaction in methanol synthesis involves carbon monoxide and hydrogen; carbon dioxide serves primarily to regulate the bed temperature and control the water content in crude methanol. Why is the carbon-to-carbon ratio less than 1? How can the bed temperature be controlled when the carbon dioxide content is too high? And how can the water content in crude methanol be controlled? For many companies that produce MTO-grade methanol, the water content is a key factor determining whether the methanol meets the required standards. Thank you; please help answer these questions
This post was last edited by Qin Shang on 2016-5-11 21:18. Is what the original poster is referring to the hydrogen-to-carbon ratio? This is related to the process design for methanol synthesis; in our Topsoe process from Denmark, the hydrogen-to-carbon ratio in the feed gas is 2.05–2.15, with CO2 accounting for around 2.7%. CO2 plays a crucial role in methanol production, by stabilizing the temperature of the synthesis reaction bed and suppressing side reactions, particularly the formation of by-products such as dimethyl ether.