CH4/N2在活性炭上吸附性能的研究

Study on adsorption capacity of CH4/N2 on activated carbon

关键词:  变压吸附  活性炭  油田伴生气  CH₄/N₂  气体分离

Key words:  pressure swing adsorption  activated carbon  oilfield associated gas  CH₄/N₂  gas separation

摘要:

变压吸附是分离油田伴生气中N₂和CH₄的可行性方法,采用质量法测定了N₂、CH₄在活性炭WHXR-LB20上的吸附等温线,分离系数为2.87,满足工业应用要求且再生效果好；同时测定了油田伴生气中C₂H₆、C₃H₈,n-C₄H₁₀等对WHXR-LB20的影响,结果表明,C₂H₆、C₃H₈在WHXR-LB20上再生效果很好,而n-C₄H₁₀在WHXR-LB20上有积累,该积累量使N₂和CH₄在WHXR-LB20上的饱和吸附量降低。 

Abstract:

Pressure swing adsorption is the feasible method for nitrogen and methane separation in the oilfield associated gas. The adsorption isotherm of nitrogen and methane on the activated carbon WHXR-LB20 were determined by gravimetric method. The separation coefficient was 2.87, which could satisfy the demand in industrial application. The activated carbon had good regeneration effect to nitrogen and methane. The effects of ethane, propane and n-butane in the oilfield associated gas on WHXR-LB20 were determined. The results showed that the activated carbon has good regeneration effect to the ethane and propane. But the n-butane accumulated on the WHXR-LB20. The accumulation amount reduced the saturated adsorption capacity of nitrogen and methane on the activated carbon WHXR-LB20.