To aim at the cryogenic liquefaction technology of low-concentration coal-bed methane,simulation study was made on the cryogenic distillation process with Aspen Plus software. It was found from the study that when the inlet flow rate of the feed gas was 552 kmol / h and the pressure of the distillation column was 0. 34 MPa,the purity of the liquid methane at the column bottom was 99%. Analysis was carried out on the influence of the coal- bed methane flow rate fluctuations on the cryogenic distillation. Whe...
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