Separation of methane/air by pressure swing adsorption with commercial molecular sieve
LIU Chang
ZHANG Jinhua
CHE Yongfang
GUO Haoqian
LI Xiaoliang
LI Xuefei
Abstract：In order to improve adsorption and concentration effects of coalbed methane by pressure swing adsorption (PSA),the upgrading and separation efficiency of methane/air mixture gas was studied by four-tower PSA device based on a kind of commercial molecular sieve.The effects of adsorption time,adsorption pressure,and concentration of raw gas on enrichment and economical efficiency were re-searched.The results showed that the enrichment and separation effects of the molecular sieve was the best when the adsorption time was 180 s while adsorption pressure was 300 kPa.Longer adsorption time or higher adsorption pressure was of no advantage to the reaction.For high,medium and low concentrated coal bed methane,the rate could be improved by more than 20% at one time through controlling the adsorption time and pressure,which could enrich the raw gas to 30.56%,76.33%,89.18%from 10%,35%,65%.The handing capacity for raw gas could increased to 67.77,68.99 and 83.36 m3/(t· h) by 20%,40%,25%.The experiments could provide reference for the industrial application in coal bed methane enrichment.The recovery of methane in product increased to 94.45%,69.68%and 87.22%.
Keywords：coalbed methanemethane/air mixturepressure swing adsorptionmolecular sieve
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 63-66,73 )