中国塑料 ›› 2023, Vol. 37 ›› Issue (2): 62-70.DOI: 10.19491/j.issn.1001-9278.2023.02.010

• 加工与应用 • 上一篇    下一篇

Mg掺杂UiO⁃66的制备及其塑料油品脱氯性能

翟永怡, 李瑞丽(), 卜禹豪, 姬娅茹   

  1. 中国石油大学(北京)重质油国家重点实验室,北京 102249
  • 收稿日期:2022-11-30 出版日期:2023-02-26 发布日期:2023-02-22
  • 通讯作者: 李瑞丽(1965—),女,副教授,从事清洁油品生产的教学与研究,lrl4806@163.com
    E-mail:lrl4806@163.com

Preparation and dechlorination performance of Mg⁃doped UiO⁃66 for plastic oil

ZHAI Yongyi, LI Ruili(), BU Yuhao, JI Yaru   

  1. State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China
  • Received:2022-11-30 Online:2023-02-26 Published:2023-02-22
  • Contact: LI Ruili E-mail:lrl4806@163.com

摘要:

采用溶剂热法制备了八面体形态的UiO⁃66并采用金属Mg掺杂对UiO⁃66进行改性。为考察最佳掺杂浓度,制备了Mg⁃UiO⁃66⁃nn为镁锆摩尔比)吸附剂。利用X射线衍射仪(XRD)、红外光谱仪(FTIR)和扫描电子显微镜(SEM)等对吸附剂的形貌和表面性能进行了表征,并研究了Mg⁃UiO⁃66⁃0.07的吸附脱氯性能以及吸附机制。结果表明,Mg掺杂UiO⁃66吸附剂已被成功制备;Mg⁃UiO⁃66⁃0.07的吸附效果最佳,吸附时间为4 h,吸附温度为40 ℃,剂油比为1/40时的脱除率达95.03 %,可再生循环使用5次。吸附过程是1个自发的化学吸附过程,符合拟二级动力学模型。

关键词: 塑料裂解油, UiO?66, 吸附, 有机氯化物, 吸附动力学, 吸附热力学

Abstract:

The octahedral UiO⁃66 was prepared by means of a solvothermal method, followed by modification through doping an Mg metal. To explore the optimal doping concentration, the Mg⁃UiO⁃66⁃nn is molar ratio of magnesium to zirconium) adsorbent was prepared, and their morphology and surface properties were characterized using X⁃ray diffractometer, infrared spectrometer, and scanning electron microscope. The adsorption and dechlorination properties and adsorption mechanism of Mg⁃UiO⁃66⁃0.07 were investigated. The results demonstrated the successful fabrication of the Mg⁃doped UiO⁃66 adsorbent. The Mg⁃UiO⁃66⁃0.07 achieved the best adsorption effect at an adsorption time of 4 h and an adsorption temperature of 40 ºC. The Mg⁃UiO⁃66⁃0.07 gained a removal rate of 95.03 % at a solvent⁃to⁃oil ratio of 1/40 and could be recycled for reutilization 5 times. This adsorption process is a spontaneous chemical adsorption process, which conforms to a pseudo second order kinetic model.

Key words: plastic cracking oil, UiO?66, adsorption, organic chloride, adsorption kinetics, adsorption thermodynamics

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