油品组分对烯烃聚砜抗静电作用效果的影响

Effects of Fuel Components on the Anti-Static Performance of Poly(olefin sulfone)s in Hydrotreated Diesel

以长链α-烯烃和SO2为原料合成了烯烃聚砜,评价了烯烃聚砜对加氢柴油的抗静电效果,考察了油品模拟组分尤其是极性非烃类化合物对烯烃聚砜抗静电作用效果的影响,探讨了烯烃聚砜的抗静电作用机制。结果表明,当烯烃聚砜的添加量为2mg/L时,加氢柴油电导率增加值(Δσ)为107pS/m,储存7d后,Δσ达到234pS/m,且没有衰减趋势。在石油醚模拟油中,烯烃、单环芳烃对烯烃聚砜的抗静电作用效果有一定的促进作用,含极性N—H、O—H键的化合物如苯胺、间甲酚等,由于与烯烃聚砜形成氢键,降低了其抗静电效果;强酸性的环烷酸及十二烷基苯磺酸与烯烃聚砜之间有很强的抗静电协同作用,主要原因是二者之间相互作用,发生了电荷分离。在加氢柴油中,环烷酸与烯烃聚砜没有抗静电协同作用,而将羧基引入烯烃聚砜分子链中的烯烃-顺酐聚砜的抗静电效果明显优于烯烃聚砜的。

Poly（olefin sulfone）s was prepared from α-alkenes and sulfur dioxide.The anti-static performance of poly（olefin sulfone）s in hydrotreated diesel fuel was evaluated.The effects of fuel components,in particular,the polar compounds on the anti-static performance of poly（olefin sulfone）s in petroleum ether were investigated and the anti-static mechanism was discussed.The results showed when poly（olefin sulfone）s＇s dosage was 2 mg/L,the conductivity increment（Δσ） of hydrotreated diesel fuel was 107 pS/m,and up to 234 pS/m after storing 7 d without decrease.Olefins and monocyclic aromatic hydrocarbons had modest synergistic anti-static effects with poly（olefin sulfone）s,the compounds containing polar N—H and O—H bond,such as aniline and m-cresol which could form hydrogen bond with sulfone group within poly（olefin sulfone）s had adverse effects on the anti-static performance of poly（olefin sulfone）s in petroleum ether.Naphthenic acid and dodecylbenzenesulphonic acid had large synergistic anti-static effects with poly（olefin sulfone）s in petroleum ether,because the strong interaction between them caused separation of charges.Naphthenic acid in diesel fuel had no synergistic anti-static effect with poly（olefin sulfone）s,but poly（olefin-maleic anhydride sulfone）s containing carbonyl group within the molecule had better anti-static performance than poly（olefin sulfone）s.