Hourly off-gas volume for 250,000 tons/year coal-to-methanol project
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The designed capacity of this project is 760 tons per day; the fresh gas flow rate to the methanol compressor is 71,500 NM3/H, the methanol synthesis pressure is 5.0 MPa, and membrane separation is used to extract hydrogen from the off-gases. Students with practical production experience, could you tell me what the amount of methanol off-gas is approximately? Thank you! !
Approximately 3200 NM3
Thank you for the reply from the second floor. However, the lowest value I saw was 6000 NM3, while the highest was 15000 NM3. I don’t understand why there is such a large difference
I believe that the amount of gas released is determined by the content of inert gases in the circulating gas; a certain level of inert gases is required in the gas fed into the synthesis tower. Changes in the composition of the fresh synthesis gas or the duration of catalyst use also affect the amount of gas released.
The methane synthesis off-gas volume is around 13,000 Nm3/h; UGI gas generation process
The amount of gas released is primarily determined by the volume of fresh gas and its composition, as well as the composition of the recycled gas; that is, the amount of gas released = (volume of fresh gas * proportion of inert gases in the fresh gas) / proportion of inert gases in the recycled gas