加拿大合成原油减压馏分油及其催化裂化液体产物中含硫化合物分析

应用GC PFPD和GC MS技术对加拿大油砂合成原油（Synthetic Crude Oil，简称SCO）减压馏分油（350 ℃~500 ℃）中的含硫化合物进行定性定量分析。结果表明，所含硫化物主要是C3~7二苯并噻吩，而催化裂化反应后则以短侧链二苯并噻吩为主，还含少量烷基苯并噻吩和烷基噻吩，三者的质量分数分别为82.04%、13.42%和0.56%，均属于难以加氢脱除的含硫化合物。SCO减压馏分油和大港减压馏分油按不同比例混合后进行催化裂化反应，随着加拿大合成原油减压馏分油搀兑比增加，所得液相产物中烷基噻吩和烷基苯并噻吩质量分数逐渐降低，烷基二苯并噻吩相对质量分数增加，4-MDBT是丰度最高的含硫化合物，显示加氢油的特征。随掺兑比的提高，液相产物中总硫质量分数和柴油馏分中硫质量分数逐渐增高，而汽油馏分中硫质量分数逐渐降低。

Analysis of sulfur compounds in VGO of SCO and its FCC liquid

Sulfur compounds in VGO of SCO（Synthetic Crude Oil） from Canadian oil sand bitumen were identified with GC PFPD and GC MS methods. The sulfur compounds in VGO of SCO are mainly C3~7 dibenzothiophene, while those in FCC liquid products are short chain dibenzothiophene and a few alkylated benzothiophene and alkylated thiophene, and the percentages of these three sulfur compounds are 82.04%, 13.42% and 0.56%, respectively, and they are difficult to be removed by hydrogenation. The mixtures of VGO which mixed with SCO and Dagang in different proportion were processed in FCC reactor. With the increase of proportion of mixtures, the sulfur content of alkylated benzothiophene and alkylated thiophene in FCC liquid products reduce gradually, and the dominant part is short chain dibenzothiophene, especially 4-MDBT indicating the characters of hydrogenation of SCO. The content of sulfur in liquid products and diesel distillate increases, while it is reduced in gasoline distillate.