H/C=（H2-CO2）/（CO+CO2） I don’t understand it
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In the methanol synthesis reaction, it is required that H/C = (H2-CO2) / (CO+CO2) = 2.05~2.15. Could you please help me understand what this means?
This is the hydrogen-to-carbon ratio in the methanol reaction. The reason is that when CO2 reacts with hydrogen, one more molecule of hydrogen is consumed compared to when CO reacts; by controlling it in this way, the actual equilibrium of the chemical reaction can be maintained
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CO + 2H2 = CH3OH; CO2 + 3H2 = CH3 + H2O. This relationship determines that the appropriate hydrogen-to-carbon ratio in the feed gas used for methanol synthesis is 2.05–2.15. This ratio is maintained at 2 in order to compensate for the loss of hydrogen due to off-gases and to ensure reaction equilibrium. An excess of hydrogen is required to facilitate the reaction, and the hydrogen-to-carbon ratio in the syngas generally ranges from 3.5 to 10, with various factors influencing this value