摘要
以Br nsted酸性离子液体N-甲基-2-吡咯烷酮磷酸二氢盐([Hnmp]H2PO4)为萃取剂和催化剂,双氧水为氧化剂,二苯并噻吩(DBT)溶于正辛烷为模型油,利用正交实验法优化了DBT氧化脱硫反应工艺。所优化的反应条件为:反应温度60℃,模型油与离子液体体积比为1∶1,氧/硫摩尔比为16,氧化时间5 h;在此条件下模型油脱硫率达99.8%,实际柴油脱硫率为64.3%。由正交实验极差可知,各因素对DBT脱硫率影响的大小依次为:反应温度>反应时间>氧/硫摩尔比>剂油比;离子液体循环利用6次,脱硫率下降不明显。
The oxidative desulfurization of dibenzothiophene （DBT） in n-octane as model oil with Broensted acidic ionic liquids （ILs） N-methyl-pyrrolidonium phosphate （ [ Hnmp ] H2PO4 ） as catalytic solvent and H2O2 as oxidant was optimized by orthogonal experiments. 99. 8% of DBT in the model oil was removed under the optimal conditions of molar ratio of H2O2 to sulfur of 16： 1, reaction temperature of 60 ℃ , reaction time of 5 h, and volume ratio of model oil to ILs of 1 ： 1. The desulfurization efficiency of actual diesel was 64.3% under the optimized conditions. The influences of the desulfurization efficiency of DBT decreased in the following order： oxidation temperature 〉 oxidation time 〉 molar ratio of H2O2/sulfur （O/S） 〉 volume ratio of [ Hnmp] H2PO4 to model oil （VIL/Vmodel oil）, according to extreme analysis of orthogonal test. The IL[ Hnmp] H2PO4 can be recycled six times without a significant decrease in activity.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2009年第2期194-198,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(20276015
20576026
20806021)
