Simulation Study on Cryogenic Distillation Process of Low-concentration Oxygen-containing Coal-bed Methane Based on Aspen Plus
MA Daihui
Abstract：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. When the flow rate of coal-bed methane decreased, the methane content in nitrogen oxide gases at the top of the column increased and was within the explosion limit;with the increase of the flow rate of coal-bed methane, the purity and recovery of the methane at the column bottom decreased.
Keywords：low-concentration coal-bed methaneliquefactiondistillation columnpurity of methanerecovery
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 38-40 )