FCC汽油加氢装置工艺过程烃类组成变化规律研究  

Study on the variation of hydrocarbon composition in FCC gasoline hydrogenation unit

作　　者：蒋磊 杨晓宇 黄秀渊 孟繁文 Jiang Lei;Yang Xiaoyu;Huang Xiuyuan;Meng Fanwen(PetroChina Dalian Petrochemical Company,Dalian 116032,China)

机构地区：[1]中国石油大连石化公司,辽宁大连116032

出　　处：《炼油与化工》2022年第4期22-28,共7页Refining And Chemical Industry

摘　　要：某公司225×10^(4)t/a汽油加氢装置采用法国Axens公司Prime-G+选择性加氢脱硫技术加氢处理全馏分FCC汽油,解决了FCC汽油脱硫、降烯烃、保持液收和辛烷值的技术难题,实现满足国VI汽油质量标准的清洁汽油调和组分生产。文中通过对FCC汽油原料(Feed)、切割轻汽油(LCN)、切割重汽油(HCN)、加氢后重汽油(HCN tread)、切割轻汽油与加氢后重汽油混合产品(Product)进行硫含量、PONA族组成分析,从分子维度探究该技术在处理催化汽油过程中烃组成变化规律。结果表明:该工艺过程通过选择性加氢、轻重组分切割、重组分选择性加氢脱硫3个单元协同作用,以烯烃损失最小为原则,将FCC汽油中硫含量降至10 mg/kg以下,并通过烯烃的骨架异构进一步减少了辛烷值损失。The Prime G+ selective hydrodesulfurization technology from Axens of France was adopted to hydrotreat with the whole fraction of FCC gasoline in a 225×10^(4)t/a gasoline hydrogenation unit, which solved the technical problems of desulfurization, olefin reduction, yield and octane number retention of FCC gasoline, and realized the production of clean gasoline blending components that met the national VI gasoline quality standard. In this paper, sulfur content and PONA composition of FCC gasoline feedstock(Feed), cut light gasoline(LCN), cut heavy gasoline(HCN), hydrogenated heavy gasoline(HCN), cut light gasoline and hydrogenated heavy gasoline mixture(Product) were analyzed and the change rule of hydrocarbon composition in the process of catalytic gasoline processing was explored from the molecular dimension. The results showed that the sulfur content in FCC gasoline is reduced to less than 10 mg/kg by the synergistic effect of selective hydrogenation, light and light component cutting, and recombination selective hydrodesulfurization, and further reduced the octane loss by the skeleton isomerization of olefin.

关 键 词：全馏分催化裂化汽油 加氢脱硫 辛烷值 清洁汽油 硫含量 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]