变压吸附法脱除甲醇裂解气中CO_CO_2研究  

Studies on Removal of CO_CO_2 From Methanol Dissociated Gas by Pressure Swing Adsorption

作　　者：刘吉顺[1] 何芬[1] 李可彬[1] 

机构地区：[1]四川理工学院材料与化学工程学院,四川自贡643000

出　　处：《四川理工学院学报（自然科学版）》2015年第4期5-10,共6页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：四川理工学院研究生创新基金(y2014016)

摘　　要：以活性炭和5A分子筛为吸附剂,建立双塔吸附试验,对变压吸附法脱除甲醇裂解气中CO_CO2进行研究。测定了293 K时CO和CO2分别在活性炭和5A分子筛上的吸附等温线和动态穿透曲线,并考察了复合床的填料比和再生方法对吸附性能的影响。结果表明,所选活性炭和5A分子筛对CO和CO2具有较大的静态和动态吸附量,且利用活性炭吸附CO2,5A分子筛吸附CO时甲醇裂解气中CO2和CO吸附和脱附效果更好;复合床活性炭/5A分子筛在填料比为40/20时床层利用率和杂质吸附量最高;H2吹扫法的再生效果优于抽真空法,吹扫气量为2.92 L/min时杂质脱除率较高且H2的消耗量合理,在变压吸附中将顺放气用作吹扫,可有效降低H2的消耗。The twin towers adsorption test was carried out by using activated carbon and 5A molecular sieve as adsorbents,and the removal of CO_CO2from methanol dissociated gas by pressure swing adsorption was studied. The adsorption isotherms and breakthrough curves of CO and CO2 on activated carbon and 5A molecular sieve were investigated at 293 K,meanwhile,the influence of composite bed packing ratio and regeneration method on adsorption performance was also discussed. The results showed that the chose activated carbon and 5A molecular sieve had high static adsorption capacity and dynamic adsorption capacity to CO and CO2,moreover,a much higher adsorption and desorption efficiency of CO and CO2 from dissociated methanol gas was achieved when CO2 was adsorbed by activated carbon and CO was adsorbed by 5A molecular sieve,separately. The highest adsorption capacity and bed use ratio were obtained when the packing ratio of composite bed activated carbon /5A molecular sieve was about 40 /20. The regeneration effect of H2 countercurrent purge was better than vacuum desorption,and the removal efficiency of impurity was higher and the consumption of H2 was reasonable when the purge gas at 2. 92 L / min. In the process of pressure swing adsorption,the co-current gas was used to purge,which effectively decreased the consumption of H2.

关 键 词：变压吸附法 脱碳 复合床层 吸附等温线 

分 类 号：TQ116.2[化学工程—无机化工] TQ028.15