摘要
利用高压釜反应装置在高温高压下开展了汽油-硫酸镁化学还原反应含水和无水体系的模拟实验,通过气相色谱仪、微库仑仪、毛细管气相色谱/脉冲火焰光度检测器、红外光谱仪及X射线衍射仪对气、油、固三相产物分别进行了分析并对动力学进行了解析,表明主要生成氧化镁、硫、焦炭、硫化氢、二氧化碳以及硫醇、硫醚和噻吩类等有机硫化物;随反应温度升高,反应体系中无机硫转化为有机硫的趋势增强,并主要生成热稳定性高的噻吩硫。动力学解析表明,含水和无水条件硫酸镁转化反应的活化能分别为68.9和78.5 kJ/mol,证明水存在有利于无机硫向有机硫转化。
To study on the formation mechanism of organic sulfides,simulated experiments for the reaction between gasoline and magnesium sulfate were carried out to study the effect of water on the formation of organic sulfides in petroleum.The products were analyzed by some advanced analytical methods including gas chromatography,microcoulometry,capillary gas chromatography combined with a pulsed flame photometric detector（GC-PFPD）,FT-IR and X-ray diffraction.Moreover,the kinetics of the reactions between gasoline and magnesium sulfate were investigated.It is shown that solid magnesium sulfate could react with gasoline to produce magnesium oxide,hydrogen sulfide,coke,carbon dioxide,and organic sulfides as the main products.With the increase of reaction temperature,the oxidation effect of magnesium sulfate were enhanced,the average molecular mass of hydrocarbon components dropped and the overall trend of inorganic sulfur transformed into organic ones were enhanced in the system.With temperature growing,sulfur was prone to convert to thiophenes with higher thermal stability.According to the kinetic results,the conversion in hydrous system is high than that of anhydrous system.The apparent activation energies for hydrous system and anhydrous system are 68.9 kJ/mol and 78.5 kJ/mol,respectively.
出处
《应用化学》
CAS
CSCD
北大核心
2011年第5期542-548,共7页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(40702019)资助项目
关键词
有机硫化物
汽油
硫酸镁
模拟实验
水介质
organic sulfur compounds
gasoline
magnesium sulfate
simulation experiment
water
