石油炼制与化工 ›› 2020, Vol. 51 ›› Issue (7): 21-26.

• 加工工艺 • 上一篇    下一篇

金属氯化物对加氢柴油的络合脱硫研究

杨冬荣,王延臻,宋春敏,段红玲   

  1.  中国石油大学(华东)重质油国家实验室
  • 收稿日期:2020-01-02 修回日期:2020-03-21 出版日期:2020-07-12 发布日期:2020-07-28
  • 通讯作者: 王延臻 E-mail:wyz3027@163.com
  • 基金资助:
     

COMPLEXATION DESULFURIZATION OF HYDROFINING DIESEL BY METAL CLORIDES

    

  1.  
  • Received:2020-01-02 Revised:2020-03-21 Online:2020-07-12 Published:2020-07-28
  • Supported by:
     

摘要: 苯并噻吩类化合物是加氢柴油中的主要残留硫化物,基于噻吩类硫化物与金属离子络合反应机理,选取4种金属氯化物CuCl2,AlCl3,FeCl3,MnCl2作为络合脱硫剂,对硫质量分数为592 μg/g的浅度加氢柴油进行脱硫研究。结果表明:单组分金属氯化物中AlCl3的脱硫效果最好,双组分金属氯化物中CuCl2 /AlCl3质量比为1∶1时的脱硫效果最好;工艺条件相同时,双组分金属氯化物CuCl2/AlCl3的 脱硫效果比单组分金属氯化物的脱硫效果好;综合考虑工艺成本和脱硫周期等因素,浅度加氢柴油脱硫的最佳工艺条件为:反应温度50 ℃,反应时间30 min,络合脱硫剂加入量(w)10%。在最佳工艺条件下进行脱硫试验时,采用AlCl3为络合脱硫剂时脱硫率达到86%,采用CuCl2/AlCl3(质量比为1∶1)为络合脱硫剂时脱硫率达到95%。

关键词: 金属卤盐, 苯并噻吩, 络合脱硫, 加氢柴油

Abstract: Benzothiophenes were the main residual sulfides in hydrofining diesels. Based on the complexation mechanism between thiophenes and metal ions, four kinds of metal chlorides such as CuCl2, AlCl3, FeCl3 and MnCl2 were selected as complexation desulfurizers for desulfurization research on shallow hydrogenated diesel with sulfur mass fraction of 592 μg/g. The results indicated that at the same conditions, the desulfurization effect of AlCl3 was the best in one-component metal chloride, and that of CuCl2 /AlCl3 in two-component metal chloride was the best when the mass ratio of CuCl2 /AlCl3 was 1:1. Considering the process cost and operation cycle, the optimum process conditions were as follows: 50 ℃, reaction 30 min with the mass fraction of complex desulfurizer of 10%. Under optimal process conditions, the desulfurization rate of AlCl3 can reach 86%, and that of CuCl2/AlCl3 can reach 95% when the mass ratio of CuCl2/AlCl3 was 1∶1.

Key words: metal chlorides, benzothiophene, complexation desulfurization, hydrofining diesel

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