›› 2018, Vol. 49 ›› Issue (8): 32-37.

• 基础研究 • 上一篇    下一篇

金属有机骨架材料MOFs用于C8芳烃吸附分离的探索研究

李伦西1,龙军1,吴巍2,乔晓菲1   

  1. 1. 中国石化石油化工科学研究院
    2. 中国石化海南炼油化工有限公司
  • 收稿日期:2018-03-22 修回日期:2018-03-26 出版日期:2018-08-12 发布日期:2018-08-21
  • 通讯作者: 李伦西 E-mail:lilunxi.ripp@sinopec.com

APPLICATION OF MOFs ADSORBENTS IN C8 AROMATICS ADSORPTION SEPARATION

Li Lunxi,Long Jun,Wu Wei,Qiao Xiaofei   

  • Received:2018-03-22 Revised:2018-03-26 Online:2018-08-12 Published:2018-08-21
  • Contact: Li Lunxi E-mail:lilunxi.ripp@sinopec.com

摘要: 采用混合溶剂热法,以硝酸铝和对苯二甲酸为原料制备了金属有机骨架材料MIL-53;使用XRD、SEM手段对合成样品结构进行表征;通过吸附等温线测试、液相静态吸附平衡实验、脉冲实验评价最优制备方法下材料的吸附性能。结果表明:制备的MIL-53材料呈现均一的尺寸和分布,晶粒尺寸为50~80 nm;该材料在相同温度和压力下对不同组分的吸附量不同,在铝盐与对苯二甲酸摩尔比为1:1的条件下,以2-甲基甲酰胺为溶剂,制备的MIL-53材料的甲苯吸附量最大;合成的MIL-53材料优先吸附邻二甲苯。

关键词: 金属有机骨架材料, 吸附分离, 吸附平衡实验

Abstract: Metal Organic Framework MIL-53 was synthesized using aluminium nitrate and terephthalic acid as raw materials via hydrothermal synthesis method and analyzed by XRD and SEM. The adsorption performance of the sample obtained under the optimal preparation conditions was evaluated by adsorption isotherms, liquid phase static equilibrium adsorption and pulse adsorption experiment. The results showed that the material has a regular micro morphology, and the particle sizes are in the range of about 50~80 nm. When the mole ratio of aluminum nitrate and terephthalic acid is 1:1, and the solvent is N, N-dimethylformamide, the MIL-53 has the maximum capacity for methylbenzene adsorption. The adsorption performance of different components is different under the similar temperature and pressure. It is concluded that MIL-53 has preferential adsorption selectivity for o-xylene.

Key words: MOFs, adsorption separation, adsorption equilibrium experiment