Simulation Study on Cryogenic Rectification Process of Low-concentration Oxygen-contained Coal-bed Methane
ZHU Jing
REN Xiaokun
XIAO Zheng
LIU Liya
Abstract：To liguefy and recover methane from the low-concentration oxygen-contained coal-bed methane by cryogenic liquefaction technology can reduce pollution emission. Simulation was made on the cryogenic rectification process of the low-concentration oxygen-contained coal-bed methane by using HYSYS software, and study was carried out on the influence of the reflux ratio of the rectifying tower, the number of trays and the rectification pressure upon the methane recovery rate, the purity of LNG products and the energy consumption of unit LNG product. Through the comprehensive consideration, it came to the conclusion that the desirable reflux ratio was 1. 1 ~ 1. 2, the number of trays was 25 ~ 30 and the absolute rectification pressure was 300 ~ 400 kPa. The simulated results can provide a reference for the process design and actual operation.
Keywords：low-concentration oxygen-contained coal-bed methanecryogenic liquefactionrectificationHYSYS
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 18-21 )