How is the theoretical yield of methanol calculated?
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This post was last edited by pyc123 on 2016-10-29 at 15:52. Our company produces 980,000 tons of coke, along with methanol and LNG; meanwhile, the gas generation plant manufactures water gas, which is used to replace coke oven gas in the coke ovens and to produce methanol in the methanol production unit； The gas composition at the inlet of the gas holder is known (this composition is that of a mixture of syngas and coke oven gas): H2SO2, N2, CH4, CO, CO2, CnHmH2 – levels are 10-6%%%%%%%; values are less than 33 and less than 0.5. Measured values: 23.88, 0.26, 2.56, 20.25, 16.31, 4.80, 2.21, 53.61; 41.67, 0.24, 2.68, 21.25, 16.00, 4.90, 2.37, 52.56; 29.98, 0.26, 2.57, 21.32, 15.79, 4.93, 2.34, 52.79; 34.19, 0.26, 2.80, 20.42, 16.17, 5.13, 2.21, 53.01; 32.00, 0.28, 2.77, 20.25, 16.17, 5.11, 2.21, 53.21; 36.19, 0.29, 2.63, 20.63, 15.76, 5.20, 2.39, 53.10; 35.16, 0.28, 2.68, 20.61, 15.92, 4.98, 2.39, 53.14; 24.50, 0.28, 2.74, 19.90, 16.34, 4.93, 2.27, 53.54. The volume of gas undergoing precise desulfurization is 28,500 NM3 per hour, while the volume of gas released is 2,000 NM3 per hour. How can the methanol production be calculated?
How should methane be processed – through upconversion or an LNG plant?
Theoretical methanol production calculation: Fresh gas minus vent gas, then plus the vapor from flashing; the effective gases are hydrogen, carbon monoxide, and carbon dioxide, which are calculated based on the reaction equations.
Let’s try calculating it this way: the total carbon in the fresh gas minus the total carbon in the vent gas, divided by 700, gives the amount of methanol produced.
700 cubic meters of methanol vapor equals one ton; you can calculate it yourself； Generally, the volume of fresh gas is simply divided by 2220–2300 to obtain the mass of methanol ； The size varies depending on the fresh gas inert gas content and the vent gas volume.
The consumption of such fresh gas is estimated to be over 2,500 cubic meters (after LNG removal)
Looking at the methanol synthesis reaction equation, by reversing the mole ratios of carbon monoxide and carbon dioxide, we get 700 cubic units