通过微孔聚合物修改的超交联树脂用于气体吸附和分离
Chuanhong Wang1, Xuefang Chen1, Shimiao Yao1
1Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|June 10, 2024
概括
这项研究引入了一种新的吸附树脂 (HR@P-1),用于增强气体分离. 这种新材料显示出更好的二氧化碳 (CO2) 吸收和选择性乙 (C2H6) 吸附,性能优于原始树脂.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 吸附树脂对于气体分离和净化至关重要.
- 纳米结构控制是优化吸附性能的关键.
- 超交联树脂 (HR) 为材料改造提供了一个多功能平台.
研究的目的:
- 开发一种具有增强气体分离能力的新型吸附树脂.
- 为了研究孔隙结构修改对吸附性能的影响.
- 评估特定气体如CO2和C2H6.6的选择性吸附.
主要方法:
- 在超交联树脂 (HR) 的毛孔内使用p-dichloroxylene (p-DCX) 的现场聚合.
- 弗里德尔-克拉夫特反应在HR矩阵内形成一个自我交叉连接的聚合物 (P-1).
- 在聚合之前和之后的孔隙结构变化 (微孔和巨孔体积) 的表征.
- 气体吸附实验以确定CO2和C2H6吸收能力和选择性.
主要成果:
- 修改后的树脂 (HR@P-1) 显示微孔体积增加 (0.4 < D < 1 nm) 和宏孔体积减少.
- 与原始HR树脂相比,CO2吸附能力增加了近30%,达到35.7cm3/g在298K和100KPa.
- HR@P-1证明了选择性的C2H6吸附,吸收量为56cm3/g,IAST选择性为15.3对于C2H6/CH4.4.
- 在环境温度下实现了高效的合成气体分离,并通过真空操作轻松再生.
结论:
- 内孔聚合是一种有效的策略,用于纳米尺度结构调整吸附树脂.
- HR@P-1树脂提供卓越的二氧化碳吸附和选择性的C2H6分离.
- 这种新型材料对高效的气体分离和净化应用具有前景.
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