EXTRACTION OF SULPHUR-CONTAINING AND POLYCYCLIC AROMATIC COMPOUNDS OF DIESEL FUEL WITH IMIDAZOLE-CONTAINING IONIC LIQUIDS

IF 0.4 Q4 CHEMISTRY, MULTIDISCIPLINARY

Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI:10.15372/csd2024541

S. KOBOTAEVA N, V. SAVINYKH YU, S. SKOROKHODOVA T

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Abstract

The extraction of sulphur-containing compounds of diesel fuel (DF) with ionic liquids (IL) based on imidazole with various substituents (butyl, octyl, nonyl, dodecyl, cetyl) in position 1 of the imidazole ring has been studied; the composition of sulphur-containing compounds and polycyclic aromatic hydrocarbons (PAH) has been determined by gas chromatography - mass spectrometry in the initial and purified diesel fuel. The optimal extraction conditions are determined: temperature 30-35 °C, extraction time 60 min, DF/IL ratio 1.66-2. The most effective extractant for the sulphur-containing compounds of DF is 1-nonyl-3-methylimidazolium bromide, which allows reducing the total sulphur content from 0.369 to 0.143 wt%. Results of the studies of group and individual composition of dibenzothiophene (DBT) and PAH derivatives show that the degree of extraction of DBT derivatives and tricyclic aromatic hydrocarbons is 66-72 %. Naphthalene and its homologues are extracted to a lesser extent - 37 %. Among DBT homologues, dimethyldibenzothiophene is extracted most completely.

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用含咪唑的离子液体萃取柴油中的含硫化合物和多环芳烃化合物

研究了用基于咪唑的离子液体（IL）萃取柴油（DF）中的含硫化合物，咪唑环 1 位上有不同的取代基（丁基、辛基、壬基、十二烷基、十六烷基）；用气相色谱-质谱法测定了初始柴油和纯化柴油中含硫化合物和多环芳烃（PAH）的成分。确定了最佳萃取条件：温度 30-35 °C，萃取时间 60 分钟，DF/IL 比率 1.66-2。对 DF 中含硫化合物最有效的萃取剂是 1-壬基-3-甲基溴化咪唑鎓，它可以将总硫含量从 0.369 wt%降至 0.143 wt%。对二苯并噻吩（DBT）和多环芳烃衍生物的组和个体成分的研究结果表明，DBT 衍生物和三环芳烃的萃取率为 66-72%。萘及其同系物的萃取率较低，仅为 37%。在 DBT 同系物中，二甲基二苯并噻吩的萃取最为彻底。

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Chemistry for Sustainable Development CHEMISTRY, MULTIDISCIPLINARY-

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