Study on extraction-oxidation desulfurization of model oil by acidic ionic liquid
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摘要: 以酸性离子液体N-羧甲基吡啶硫酸氢盐(\[CH2COOHPy\]HSO4)为萃取剂和催化剂，过氧化氢为氧化剂，用于模拟油品(二苯并噻吩溶于正辛烷配制而成)萃取-氧化脱硫反应，考察过氧化氢用量、离子液体用量、反应温度和反应时间对脱硫率的影响。研究结果表明，当氧硫摩尔比(H2O2/S)为6，在10mL模拟油品中加入0.6mL离子液体， 50℃下反应40min，脱硫率可达99.7%。离子液体循环再生使用5次，脱硫率没有明显下降。Abstract: Acidic ionic liquid N-carboxymethylpyridine hydrosulphate (\[CH2COOHPy\]HSO4) as the extractant and catalyst, and hydrogen peroxide as the oxidant were used to the extraction-oxidation desulphurization of model oil (dibenzothiophene dissolved in n-octane). The effects of the amounts of hydrogen peroxide and ionic liquid, reaction temperature and reaction time on the sulfur removal were investigated. The results show that when molar ratio of sulfur to H2O2 is 1∶6, volume ratio of ionic liquid to model oil is 0.6∶10, and reaction time is 40min at 50℃, the sulfur removal of model oil can reach 99.7%. The ionic liquid can be recycled 5 times without obvious decrease in the sulfur removal.
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Key words:
- ionic liquid /
- extraction-oxidation /
- model oil /
- desulfurization /
- dibenzothiophene
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