MIL-101Cr-F/Cl用于N2O的捕集研究

Study on the capture of N2O by MIL-101Cr-F/Cl

氧化亚氮(N2O)是仅次于CO_(2)和CH4的第三大温室气体,对其捕集具有资源回收和减排温室气体的双重价值。本文通过添加氢氟酸和盐酸合成了末端具有不同阴离子的MIL-101Cr材料:MIL-101(Cr)-F和MIL-101(Cr)-Cl,通过XRD、BET、SEM等对样品进行了表征,测试并分析了两种样品对N2O和N2的吸附性能,进行了选择性和吸附热的计算以及混合气体的穿透模拟。研究结果表明,MIL-101(Cr)-Cl拥有目前最高的N2O吸附容量(6.43 mmol/g,298 K)和N2O/N2选择性(267),混合气体(N2O/N2=0.1%/99.9%)穿透模拟结果显示MIL-101(Cr)-Cl具有更加优异的微量N2O捕获能力。

Nitrous oxide(N2O)is the third largest greenhouse gas after CO_(2) and CH4,and its capture has the dual value of resource recovery and greenhouse gas emission reduction.In this paper,MIL-101(Cr)with different anion terminals were synthesized by adding hydrofluoric acid and hydrochloric acid separately,named MIL-101(Cr)-F and MIL-101(Cr)-Cl,the synthesized samples were characterized by XRD,BET and SEM,et al.Single component adsorption isotherms of N2O and N2 were tested,and the selectivity of N2O/N2 and corresponding adsorption heat of gases were also calculated.Additionally,the simulation of mixture(N2O/N2=0.1%/99.9%)breakthrough were carried out.As the result,MIL-101(Cr)-Cl with the highest N2O adsorption capacity(6.43 mmol/g,298 K)and N2O/N2 selectivity(267)were reported.Furthermore,the simulation result confirmed that MIL-101(Cr)-Cl has great potential to capture trace amount of N2O.