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Fe基离子液体中Schiff碱Co络合物催化氧化燃油脱硫

高丽霞,戴子林,李桂英   

  1. 广州有色金属研究院,广东 广州 510651
  • 出版日期:2014-12-05 发布日期:2014-12-05

Oxidative desulfurization of fuels catalyzed by Schiff-base cobalt complex in Fe-based ionic liquid

GAO Lixia,DAI Zilin,LI Guiying   

  1. Guangzhou Research Institute of Non-ferrous Metals,Guangzhou 510651,Guangdong,China
  • Online:2014-12-05 Published:2014-12-05

摘要: 将离子液体FeCl3/BmimCl与Schiff碱Co络合物CoL组成催化体系,以氧气为氧化剂,噻吩的正辛烷溶液为模拟油,考察该脱硫体系脱除模拟油中噻吩硫的性能。结果表明,最佳脱硫条件为:模拟油25mL;IL-FeCl3/BmimCl摩尔比为1,8mL;O250mL/min;反应温度62℃;CoL0.13g;时间6h,最终脱硫率可达96%(质量分数),脱硫后油品中噻吩含量最终可降到50μg/g以下。噻吩的氧化产物为SO42-离子。离子液体再生4次后脱硫性能开始下降。该脱硫体系对实际柴油中的噻吩硫催化氧化脱硫效果可达100%,该脱硫体系具有实际应用意义。

关键词: 离子液体, Schiff碱, Co络合物, 氧化, 脱硫, 离子液体, Schiff碱, Co络合物, 氧化, 脱硫

Abstract: The oxidative desulfurization performance on model oil with thiophene was investigated with ionic liquid FeCl3/BmimCl and Schiff-base cobalt complex CoL and oxygen as the desulfurization system. Thiophene removal rate could reach 96% under the optimum condition,in which model oil dosage was 25mL,mole ratio of FeCl3/BmimCl was 1∶1 and its dosage was 8 mL,oxygen flow rate was 50 mL/min,reaction temperature was 62℃,CoL dosage was 0.13g,reaction time was 6h. The final thiophene content in the desulfurized model oil could be less than 50μg/g,and the oxidation product of thiophene was SO42?. The ionic liquid FeCl3/BmimCl could be recycled 4 times without significant decrease in desulfurization capability. The oxidative desulfurization rate of diesel oil could reach 100% with the above desulfurization system,which had good application prospect.

Key words: Ionic liquids, Schiff-base, cobalt complex, oxidation, desulfurization, ionic liquids, Schiff-base, Cobalt complex, oxidation, desulfurization

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