高稳定双金属MOF材料用于低浓度乙烷的高效分离

Stable mixed metal-organic framework for efficient C2H6/C2H4 separation

针对乙烷/乙烯分离过程中,缺乏高效稳定的乙烷选择吸附剂,采用溶剂热法合成了一种具有高稳定性的双金属微孔MOF材料MUV-10(Mn),通过吸附分离的方式,实现了乙烯中低浓度乙烷的高效分离。采用XRD、SEM、TGA、比表面分析等表征手段对所制备材料的结构及形貌进行了确认和分析,详细测试了MUV-10(Mn)对乙烷和乙烯单组分气体的吸附性能,并进行了选择性和吸附热的计算。结果表明,MUV-10(Mn)在室温下的乙烷吸附量高于乙烯对于乙烷/乙烯混合气的选择性为1.42,且具有高的酸、碱和水蒸气稳定性。混合气体穿透实验表明,MUV-10(Mn)能够高效去除乙烯中的低浓度乙烷,得到高纯乙烯气体,在乙烯提纯方面显示出良好的应用前景。

In view of lacking efficient ethane-selective adsorbent for ethane/ethylene separation,a highly stable microporous mixed metal-organic framework,termed as MUV-10(Mn),was synthesized by the solvothermal method and it could efficiently separate C2H6/C2H4 mixture.The structure and morphology of synthesized material was confirmed by XRD,SEM,TGA and BET,etc.Selectivity and corresponding adsorption heat of C2H6 and C2H4 were calculated based on single component adsorption results measured in details.The results show that MUV-10(Mn)features C2H6/C2H4 selectivity about 1.42 and can absorb more C2H6 than C2H4 at room temperature.And it has high acid,alkali and water vapor stability.Addtionally,dynamic breakthrough experiment showed MUV-10(Mn)could extracted low concentration of C2H6 from C2H6/C2H4 mixture(VC2H6/VC2H4=1∶9 and 1∶15)to collect C2H4 gas with high purity,which indicates the promising future of MUV-10(Mn)in C2H4 purification.