汽油络合萃取脱硫实验研究

Study on Desulfurization of Gasoline by Complexation Extraction

关键词:  汽油  络合萃取剂  络合  萃取  脱硫

Key words:  gasoline  complexation extraction agent  complexation  extraction  desulfurization

摘要:

采用自制的脱硫络合萃取剂(TS-1),考察其对汽油中含硫化合物的脱除效果。在萃取温度20℃,萃取时间3min,相分离时间15min,剂油体积比为9%的条件下,FCC汽油A中的硫含量从619μg/g降到136μg/g,达到国Ⅲ车用汽油硫含量标准(<150μg/g),汽油收率99.5%。在最佳操作条件下,还考察了TS-1对FCC汽油B、直馏汽油C和凝析汽油D的脱硫效果,使用较小剂油比,汽油B、C和D都可达到较高脱硫率。因此,络合萃取剂TS-1应用于汽油脱硫,具有对含硫化合物选择性好、用量少、汽油收率高和对汽油适应性优良等特点,在车用汽油深度脱硫方面展现了良好的应用前景。

Abstract:

The desulfurization effect of self-made complexation extraction agent (TS-1) is investigated. When extraction temperature is 20℃,extraction time is 3 minutes,phase separation time is 15 minutes and volume ratio of TS-1 to gasoline is 9%,the content of sulfide in FCC gasoline A drops from 619μg/g to 136μg/g,meeting the state Ⅲ of gasoline sulfur content standard (<150μg/g). The yield of gasoline A is 99.5%. Removal of sulfide from FCC gasoline B,straight-run gasoline C and natural gasoline D with TS-1 are researched too. Under the best operation conditions,the three types of gasoline can achieve a high desulfurization rate with a little amount of TS-1. Therefore,TS-1 in the experiment shows high selectivity of sulfide,small ratio of extractant to gasoline,high yield and good desulfurization adaptability to gasoline. It is a promising desulfurization complexation extraction agent in the field of deep desulfurization of gasoline.