CH_4/N_2混合气在炭分子筛上的变压吸附分离  

Separation of methane/nitrogen mixture by pressure swing adsorption on carbon molecular sieve

作　　者：席芳[1] 林文胜[1] 顾安忠[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《煤炭学报》2011年第6期1032-1035,共4页Journal of China Coal Society

基　　金：国家高技术研究发展计划(863)资助项目(2006AA06Z234)

摘　　要：测量了CH4/N2混合气在一种炭分子筛固定床上的穿透曲线;研究了该炭分子筛对CH4的提浓效果,以及原料气流速和吸附压力对分离效果及CH4回收率的影响。结果表明:在吸附初期,该炭分子筛选择性吸附N2,吸附床出口基本检测不到N2,合理地控制吸附时间可使吸附床出口气中CH4浓度达到96%以上;原料气流速对分离效果的影响大于压力的影响,且流速太大不利于CH4/N2混合气的分离;随着流速和压力的增加,CH4的回收率减小。The breakthrough curves of CH4/N2 mixture on a carbon molecular sieve（CMS） fixed adsorption bed were measured.The separation ability of this CMS was studied.The influence of fed gas velocity and adsorption pressure on separation was determined,as well as the influence on CH4 recovery.The results show that N2 is with preferentially adsorption and there is nearly no N2 at the exit of the fixed bed at the initial time of adsorption.With a proper adsorption time,the CH4 concentration in the product can be up to 96%.The feed gas velocity has a greater influence on separation than that of pressure,and it is adverse to the separation when the velocity is too large.The CH4 recovery decreases as the velocity or pressure increases.

关 键 词：甲烷-氮气混合气 炭分子筛 变压吸附 分离 动力学 

分 类 号：P618.11[天文地球—矿床学]