催化裂化柴油各馏分段碱性氮及总硫含量分布研究

对多家炼厂的催化裂化（FCC）柴油采用按体积切割馏分段的方式，对各个馏分段的碱性氮含量和总硫含量进行测试分析。结果表明，在FCC柴油中，总硫含量随着沸点的升高而升高，但碱性氮含量却随着沸点的升高而降低；以直馏柴油作对照实验，结果表明，在直馏柴油中，碱性氮和总硫含量都随沸点的升高而升高。在FCC柴油0％～60％（体积分数）的轻馏分段中集中了78．6％～86．9％的碱性氮，而在60％～100％（体积分数）的重馏分段中集中了49％～56％的硫化物。在FCC柴油中碱性氮主要集中在轻馏分，硫化物主要集中在重馏分。

Distribution of Basic Nitrogen and Sulfur Content in Fluid Catalytic Cracking Diesel

Basic nitrogen and sulfur contents in each fraction of fluid catalytic cracking diesel （FCC） from numerous refineries were analyzed by volume-cutting method. The results show that sulfur contents rise and basic nitrogen contents decline with boiling point elevation in the FCC diesel. The comparison experiments of straight-run diesel show that both basic nitrogen and sulfur contents rise with boiling point elevation. In the FCC diesel, the basic nitrogen contents in the light fractions of 0% 60% （volume percent） account for 78.6%- 486.9% of total basic nitrogen contents, and sulfur contents in the heavy fractions of 60%-100% （volume percent） account for 49%- 56% of total sulfur contents. Those indicate that basic nitrides and sulfides concentrate in light fractions and heavy fractions, respectively.