用于将乙烯从二次碳化合物混合物分离的坚固的烯结合共价有机框架的千克尺度制造
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在PubMed上查看摘要
概括
此摘要是机器生成的。一个新的共价有机框架,NKCOF-62,在一步中有效地从乙烯和乙混合物中净化乙烯. 这一突破使得用于工业应用的聚合物级乙烯的生产具有成本效益.
科学领域
- 材料科学
- 化学工程
- 分离科学
背景情况
- 从含有乙 (C<sub>2</sub>H<sub>2</sub>) 和乙 (C<sub>2</sub>H<sub>6</sub>) 的三元混合物中工业净化是非常重要的,但具有挑战性.
- 目前的方法通常涉及多个步骤或昂贵的材料, 阻碍成本效益.
研究的目的
- 从C<sub>2</sub>2</sub>/C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub>混合物中设计和合成一个高效,单步吸附性乙烯净化材料.
- 展示共价有机框架 (COF) 在工业气体分离中的潜力.
主要方法
- 通过使用廉价单体 (四甲和二甲) 的溶解聚合方法合成了化学强度较高的与烯酸结合的COFNKCOF-62.
- 这种方法比传统的溶热技术具有优势,可实现经济高效的大规模制造.
- 对C<sub>2</sub>H<sub>2</sub>和C<sub>2</sub>H<sub>6</sub>相对于C<sub>2</sub>H<sub>4</sub>的NKCOF-62的吸附选择性基于其孔隙结构和大小进行了研究.
主要成果
- NKCOF-62在吸附乙烯和乙方面表现出显著的选择性,同时允许乙烯通过.
- 突破性实验成功地在单一分离过程中直接从1:1:1的三元混合物中产生聚合物级乙烯.
- 由于其独特的孔隙环境和优化的孔隙大小,该材料具有很高的选择性.
结论
- NKCOF-62是第一个被证明有效分离C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>6</sub>/C<sub>2</sub>H<sub>4</sub>混合物的COF.
- 这项工作为设计和建造强大的COF提供了可行的蓝图,用于要求高的工业气体分离过程.
- 这种化聚合法可使先进的COF生产具有成本效益.
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