Methanol hydrogen-to-carbon ratio and conversion rate
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In our company, the hydrogen-to-carbon ratio is (H2-CO2)/(CO2+CO), which equals 2.4–2.5. The one-way conversion rate of carbon monoxide is 60%–70%, with an average of around 66%. Are there any shortcomings in the control of this parameter? Our monol alcohol consumption in terms of gas usage is a bit high; the catalyst has been in use for 1.3 years now, the temperature at the tower outlet is 230 degrees, and the pressure is 5.1–5.2 Mpa.
What catalyst is being used? The hydrogen-to-carbon ratio is similar; the CO conversion rate is a bit low, but it is highly dependent on the catalyst. There are many indicators to consider when determining whether an operation is economical or not; for example, the exit temperature of the synthesis tower is 230 – what is your starting temperature? This is also low. . . .
The hydrogen-to-carbon ratio of the fresh gas is generally 2.15–2.15; in other words, after the reaction, only a small amount of syngas is lost in the off-gases, thereby minimizing the gas consumption per ton of alcohol produced. Your conversion rate is also quite high; it’s recommended to make adjustments to the gas composition.