柴油馏分中含硫化合物组成与分布特征

Characterization of sulfur compounds in diesel fractions

采用毛细管气相色谱／脉冲火焰光度检测器（GC／PFPD，Gas Chromatograph／Pulsed Flame Photometric Detector）对新疆独山子石化公司炼油厂的五种柴油馏分中的硫化物进行了分析。结果表明，常一线馏分中所含的硫化物主要是C0～4苯并噻吩；常二线馏分中除含有C1-4苯并噻吩外还含有大量的C0-3二苯并噻吩及部分未知硫化物；焦化柴油中硫化物组成最为复杂，包含中间馏分油中所有常见的硫化物类型；而催化裂化柴油和加氢柴油中硫化物类型主要为烷基苯并噻吩和烷基二苯并噻吩，其中加氢柴油中的硫化物相对丰度比催化裂化柴油低的多。

Capillary gas chromatography coupled with pulsed flame photometric detector （GC/PFPD） was used for the qualitative and quantitative analyses of sulfur compounds in five diesels. The result show that the sulfur compounds present in straight run diesel （156.5 ℃ -272.5 ℃ ） are mainly alkyl-substituted benzothiophenes （ BTs）, and the dominant sulfur compounds are C3 -4-BTs, alkyl-substituted dibenzothiophenes （DBTs） in straight run diesel （204.0 ℃ - 363.0 ℃ ）. Alkyl-substituted BTs and DBT are abundance and no other sulfur compounds were identified in the FCC diesel and hydrofining diesel. Sulfur-containing compounds in coking diesel including almost all types of sulfides in middle distillate fractions.