Composition of Shell crude gas
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According to the literature, the composition of Shell crude gas typically has a CO+H2 content of 80%~90%, or even higher, while the CH4 content is low. Is it possible for the CH4 content to be relatively high, reaching 5% or 10%? ?
It’s impossible; the reaction temperature reaches 1400–1700°C, so the level of methane cannot be high – this can be calculated using simulation software! Haha, please point out all the mistakes! Thank you.
Under normal circumstances, it’s basically impossible to reach 5% or 10%, unless “special measures” are taken, haha
Vaporization conditions: temperature, pressure, and residence time determine that the methane content will not be high
It’s impossible; the Shell process belongs to the third generation of gasification technology, so it certainly doesn’t contain such high levels of methane. The Shell process utilizes dry powder pure oxygen fluidized bed gasification technology; the temperature in the reduction zone of the gasifier is around 2200°C, and the normal methane content can absolutely not exceed 0.1%. Methane is an inert gas in the syngas produced by gasification, and it is of no use in the subsequent production of methanol or ammonia; on the contrary, its presence in large quantities consumes more energy.
Gas composition at the outlet of the SHELL gasifier (%): H2: 23.1, N2: 6.4, CO: 48.5, CO2: 2.1, AR: 0.05, H2O: 19.7, CH4: 0.05. The methane content in the gas produced by SHELL gasification does not exceed 0.1%
Actual experience has also shown that it is impossible!
I see. But from a computational simulation perspective, it seems that the amount of CH4 produced is related to the water-coal ratio. Is that really the case?
There’s no need to go through the calculations; so many manufacturers already have practical operating experience. To produce more methane, it is better to use U-gas and BTL (Lurgi furnace).