轻质石脑油氧化脱硫和热脱硫的对比研究

Comparative Study on Oxidative Desulfurization and Thermal Desulfurizationof Light Naphtha Components

轻质石脑油一般需要降低硫含量才能作为催化重整的进料。利用白蛋壳和颗粒活性炭作为催化剂,与热脱硫工艺进行对比,研究各因素对轻质石脑油脱硫效果的影响规律,并确定了轻质石脑油达到最佳脱硫效果的操作条件。考虑轻质石脑油脱硫的影响因素主要包括过氧化氢与轻质石脑油的配比、溶液pH值、搅拌速度、温度、接触时间、白蛋壳和活性炭用量。结果表明:热脱硫的转化率较低,而颗粒活性炭氧化脱硫的转化率较高;脱硫效率与溶液pH值成反比,与其它影响因素成正比;氧化脱硫方法以适宜、经济、环保的方式脱硫,可达到零残留水平。研究结果可为轻质石脑油脱硫方式的选择提供依据。

Compared with hot desulfurization process,white eggshell and granular activated carbon were used as catalysts to study the influencing factors of light naphtha desulfurization,and the optimum conditions of light naphtha desulfurization were determined by using a variety of design parameters.The influencing factors of light naphtha desulfurization mainly include the ratio of hydrogen peroxide and light naphtha,pH value of solution,stirring speed,temperature,contact time and catalyst dosage.The results show that the conversion of thermal desulfurization is low,while that of granular activated carbon is high.The desulfurization efficiency is inversely proportional to the pH of the solution and in direct proportion to other influencing factors.The catalytic desulfurization method is suitable,economical and environmental friendly to achieve zero residue level.The results can provide basis for the selection of light naphtha desulfurization methods.