Low Concentration Coal Mine Methane concentrated by vacuum Pressure Swing Adsorption
In order to solve the current situation that lowconcentration oxygen-bearing coal mine methane cant be concentrated and utilized, the vacuum pressure swing adsorption process was employed to concentrate the oxygen-bearing coal mine methane gas with the methane concentration of 20％. To ensure the safety of the enrichment process, mixed adsorbents consist of active carbon and carbon molecular sieve was used innovatively, which can adsorb methane and oxygen simultaneously. So that the oxygen and methane concentration of both effluent gas and product gas of the process are both in safe range. The separation process of coal mine methane gas was carried out at room temperature under adsorption pressure no more than 320 kPa abs., and desorption pressure about 25 kPa abs. The effects of adsorber adsorption time, adsorbents quality ratio, adsorption pressure, purge time, purge time on the process were investigated. When the quality ratio of carbon molecular sieve and active carbon was 3.4, the methane can be concentrated to upper than 33％, the concentration of methane and oxygen in effluent gas are lower than 2.4％ and 10.8％ respectively. When we added a purge step with a purge time of 5s ,the product methane concentration decreased to 31％, and the concentration of methane and oxygen in effluent decreased to 1.6％ and 9.5％ respectively. This study shows that the lowconcentration coal mine methane gas can be concentrated and utilized for industrial applications.
coal mine methane vacuum pressure swing adsorption oxygen methane separation active carbon carbon molecular sieve
Yang Xiong Liu Ying-Shu Li Yong-Ling Zhang Chuan-Zhao Meng Yu Yang Hai-Jun
Department of Thermal Engineering,University of Science and Technology Beijing Beijing, China Department of Thermal Engineering,, University of Science and Technology Beijing Beijing, China
国际会议
2010 International Conference on Digital Manufacturing and Automation(2010 数字制造与自动化国际会议 ICDMA 2010)
长沙
英文
895-898
2010-12-18（万方平台首次上网日期，不代表论文的发表时间）