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化工学报  2015 

ZIF-8/乙二醇-水浆液吸收-吸附CH4/H2和CH4/N2

DOI: 10.11949/j.issn.0438-1157.20150668, PP. 3130-3136

Keywords: ZIF-8,乙二醇水溶液,甲烷,吸收-吸附,平衡

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Abstract:

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。

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