The effect of the chemical composition of the hydrotreated light cycle oil (HDT LCO) on the benzene, toluene, ethylbenzene, and xylene (BTEX) production by a hydrocracking (HCK) procedure, is presented. Six different types of HDT LCOs were obtained by submitting two types of LCOs to hydrotreating (HDT) with different catalysts and experimental conditions. The products were analyzed as mono-, di- and tri-aromatic compounds using the supercritical fluid chromatography (SFC) method (ASTM D5186). The HDT LCOs were subjected to HCK with a 50/50 in weight mixture of nickel-molybdenum on alumina (NiMo/Al₂O₃) and H-ZSM5 (NiMo/H-ZSM5, 50/50) at 375 °C, 7.5 MPa, 1.2 h⁻¹, and 750 m³/m³ H₂/Oil. The HCK products were analyzed by gas chromatography with a flame ionization detector (GC-FID) and divided into five groups: gas, light hydrocarbons (LHCs), BTEX, middle hydrocarbons (MHCs), and heavy hydrocarbons (HHCs).

The results showed that the BTEX formation ranged from 27.0 to 29.8 wt.% and it did not show a significant dependence on the mono-aromatic (59.9 and 75.6 wt.%), total aromatic (61.1–84.2 wt.%) contents or MHCs conversion (58.3–64.3 wt.%) from the departing HDT LCO feedstock. This result implies that, contrary to previous expectations, the BTEX formation does not directly depend on the amounts of total or mono-aromatic compounds when departing from real feedstocks. A GC-PIONA (paraffin, isoparaffin, olefin, naphthene, aromatic) characterization method (ASTM D6623) for mechanism understanding purpose was also carried out.

介绍了加氢处理轻循环油 (HDT LCO) 的化学成分对加氢裂化 (HCK) 程序生产苯、甲苯、乙苯和二甲苯 (BTEX) 的影响。通过使用不同的催化剂和实验条件对两种类型的LCO进行加氢处理(HDT)，获得了六种不同类型的HDT LCO。使用超临界流体色谱 (SFC) 方法 (ASTM D5186) 对产物进行单、二和三芳香族化合物分析。 HDT LCO 使用 50/50 重量比的镍钼氧化铝混合物 (NiMo/Al ₂ O ₃ ) 和 H-ZSM5 (NiMo/H-ZSM5, 50/50) 在 375 °C、7.5 下进行 HCK。MPa、1.2h ^-1和750m ³ /m ³ H ₂ /油。 HCK产物通过带有火焰离子化检测器(GC-FID)的气相色谱法进行分析，并分为五组：气体、轻烃(LHC)、BTEX、中烃(MHC)和重烃(HHC)。

结果表明，BTEX 的形成范围为 27.0 至 29.8 wt.%，并且并未表现出对单芳香族化合物（59.9 和 75.6 wt.%）、总芳香族化合物（61.1–84.2 wt.%）含量或 MHC 的显着依赖性。离开 HDT LCO 原料的转化率 (58.3–64.3 wt.%)。这一结果意味着，与之前的预期相反，当偏离实际原料时，BTEX 的形成并不直接取决于总芳香族化合物或单芳香族化合物的量。还开展了用于机理理解的 GC-PIONA（链烷烃、异链烷烃、烯烃、环烷烃、芳烃）表征方法 (ASTM D6623)。