Simulation Experiments on Effect of Reaction Conditions for the Formation of Organic Sulfides
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摘要: 采用正交试验设计法，对正辛酸与硫酸镁反应形成有机硫化物的过程进行了模拟实验研究，探讨了反应温度、反应时间和反应体系中的含水量对有机硫化物形成的影响，结果表明，温度对有机硫化物生成的贡献率为59%，含水量的贡献率为26%，反应时间的贡献率为12%，反应温度是影响有机硫化物形成的关键因素。在优化有机硫化物形成条件之后，分别开展了正辛酸和正辛烷与硫酸镁反应体系的模拟实验及动力学研究，结果表明，两种反应体系主要生成了氧化镁、焦炭、硫化氢、二氧化碳、硫醇类、硫醚类及噻吩类有机硫化物等产物。随反应温度升高，无机硫向有机硫转化的总体趋势加深，且主要向热稳定性高的噻吩类有机硫化物转化。正辛酸与硫酸镁反应体系的活化能为45.23 kJ·mol-1，正辛烷与硫酸镁反应体系的活化能为48.6 kJ·mol-1。Abstract: Orthogonal experimental on the system of noctylic acid and magnesium sulfate were carried out to investigate the relationship among temperature, reaction time and the amount of water in the system. The results show that temperature is the critical factor in the process of the formation of organic sulfides, which gives contributions of 59% to the experimental results. The second is the amount of water, 26 percent, and reaction time gives less effect. And also, the thermal simulation experiments and kinetics for systems of noctylic acid with magnesium sulfate and noctane with magnesium sulfate were carried out. It is shown that solid magnesium sulfate could react with noctylic and noctane gas to produce magnesium oxide, hydrogen sulfide, coke, carbon dioxide, and organic sulfides as the main products. With the increasing temperature, the conversion of inorganic sulfur to organic sulfur especially to thiophene sulfur increases. The values of apparent activation energy for noctylic acid with magnesium sulfate and noctane with magnesium sulfate are 45.23 kJ·mol1 and 48.6 kJ·mol1.
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Key words:
- simulation experiment
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