Safety analysis on low concentration coal bed methane enrichment process by proportion pressure swing adsorption
Abstract：The experimental study and safety analysis was carried out on low concentration coal bed methane enrichment based on the coward explosion triangle.The results show that the traditional PSA approach by using single adsorbent will probably make methane concentration very close to the explosion limit and result in explosion risk in the adsorption process,when the methane concentration in coal bed is below 30%.Based on pressure swing adsorption,Proportion Pressure Swing Adsorption（PPSA）,a new enrichment method with high safety,was suggested to enrich the low concentration coal bed gas.A mixture of active carbon（AC） and carbon molecular sieve（CMS） was employed as adsorbent in the process of PPSA.The methane and oxygen in coal bed gas were adsorbed simultaneously,where methane was mostly adsorbed on active carbon and oxygen was mostly adsorbed by CMS.The results show that the CH4,O2 concentration can be controlled well and is not over explosive limit both in adsorption and desorption processes by adjusting the mass ratio of CMS5/AC1.
Keywords：low concentrationcoal bed methanePPSAadsorbent admixturesafety
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 804-809 )