ZIF-8/乙二醇-水浆液吸收-吸附CH_4/H_2和CH_4/N_2  

Absorption-adsorption of CH_4/H_2 and CH_4/N_2 in ZIF-8/glycol-water slurry

作　　者：潘勇[1] 张喆[1] 童雄师 李海[1] 刘蓓[1] 孙长宇[1] 陈光进[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《化工学报》2015年第8期3130-3136,共7页CIESC Journal

基　　金：国家自然科学基金项目(U1162205)~~

摘　　要：为了有效地捕集焦炉气及煤层气中的甲烷,提出了一种新型捕集技术:吸收-吸附组合方法,该方法通过把ZIF-8分散到乙二醇水溶液中形成悬浮浆液,实现对甲烷组分的捕集。首先测定了甲烷、氮气和氢气在浆液中的吸收-吸附容量,得出吸着量大小的顺序为CH4>N2>H2,然后对CH4/H2和CH4/N2的混合气进行吸着平衡研究,发现浆液均能有选择性地吸着甲烷。对浆液中回收的ZIF-8材料进行XRD表征,分析证明在整个吸着过程中ZIF-8结构没有发生变化并且ZIF-8/乙二醇-水浆液能重复利用。In order to capture methane effectively from coke oven gas and coalbed methane, this paper proposes a new capture technology： absorption-adsorption combined method to capture methane by suspending ZIF-8 （zeolitic imidazolate framework-8） in a glycol-water solution. Firstly, the absorption-adsorption capacities of methane, nitrogen and hydrogen in the slurry were measured. The order of adsorption capacities were CH4〉N2〉H2. Then the ability of separationof the slurry forthe mixtures of CH4/H2 and CH4/N2were investigated. It was found that the mixtures can be separated effectively. The recovered ZIF-8 from the slurry was analyzed using XRD, and the results demonstrated that ZIF-8 did not change throughout the separation process and ZIF-8/glycol-water slurry can be reused.

关 键 词：ZIF-8 乙二醇水溶液 甲烷 吸收-吸附 平衡 

分 类 号：TQ028.8[化学工程]