在微孔材料上分离C(5) - 碳化合物:MOF和热质石的互补性能
Michael Maes1, Luc Alaerts, Frederik Vermoortele
1Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Arenbergpark 23, B-3001 Leuven.
Journal of the American Chemical Society
|February 4, 2010
概括
这项研究探讨了使用新型吸附剂分离C(5) 碳化合物. 金属有机框架和热质石有效地分离二烯,单烯和,对于蒸汽破解机料至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 分离科学 分离科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 蒸汽裂解产生复杂的C(5) 碳化合物混合物,包括二烯,单烯和.
- 这些成分的有效分离是具有挑战性的,但对于下游化学过程至关重要.
- 分离C(5) -二olefin异构体 (异烯,跨-烯, cis-烯) 特别少被研究.
研究的目的:
- 为了研究C(5) 酸碳化合物的液相分离.
- 为了比较金属有机框架 (MOF) 和热利特在分离C(5) 双烯,单烯和抛的有效性.
- 阐明控制这些分离的选择性的吸附机制.
主要方法:
- 用三种材料进行吸附研究:MIL-96 (一种MOF) 和两种具有CHA和LTA拓的热带石.
- 这些材料具有宽的子,可以通过狭窄的孔窗 (<0.5 nm) 进入.
- 测量了各种C(5) 碳化合物混合物的吸附选择性和吸附能力.
主要成果:
- 由于高效的孔包装,MIL-96和沙巴 (CHA硫酸) 首选吸附从C(5) -二olefin混合物中的跨烯.
- 查巴还通过对分支异构体的尺寸排除来分离 cis-piperylene 和 isoprene.
- MIL-96独特地将三种二olefin异构体从C(5) -mono-olefins和paraffins中分离出来; [Cu(3) ((BTC) ((2) ]MOF将C(5) -olefins从paraffins中分离出来.
结论:
- 沙巴石适用于分离所有三种C(5) -二olefin异构体,也可以从线性分离到分支的单烯和烯.
- MIL-96证明了将二olefins与单一olefins和paraffins分离的能力.
- 一个MOF和热利石的联合系统可以实现C(5) 分数的完全分离.
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