催化裂化汽油催化裂解生产化学品工艺研究  

Study on Catalytic Cracking Process of Fluid Catalytic Cracking(FCC)Gasoline to Produce Light Olefins and Aromatic Chemicals

作　　者：辛利 李京芳 季超 张耀日 XIN Li;LI Jingfang;JI Chao;ZHANG Yaori(CNOOC Institute of Chemical&Advanced Materials(Beijing)Co.,Ltd.,Beijing 102200,China)

机构地区：[1]中海油化工与新材料科学研究院(北京)有限公司,北京102200

出　　处：《当代化工》2024年第4期769-773,共5页Contemporary Chemical Industry

基　　金：中海石油炼化有限责任公司科技项目,DPC技术提高化学品收率工艺研究;国家自然基金(项目编号:U23B20169)。

摘　　要：以催化裂化汽油为原料,对比研究了催化裂化汽油在提升管工艺和流化床工艺催化裂解生产低碳烯烃和芳烃化学品的产物分布和性质,分析了2种工艺化学品收率以及氢平衡的差异。结果表明:流化床工艺具有更高的原料裂解深度,表现出更高的干气、液化气和焦炭收率,以及汽油产物中更高的芳烃质量分数。提升管工艺氢转移反应较弱,气体产物中低碳烯烃质量分数明显高于流化床工艺。反应温度提高,提升管工艺中气体产物收率增幅更大,流化床工艺中焦炭收率增加显著。在600℃反应温度下,提升管工艺低碳烯烃收率30.77%(质量分数)、芳烃收率39.71%(质量分数),总化学品收率为70.48%(质量分数),高于流化床工艺总化学品收率2个百分点以上。提升管和流化床工艺中原料氢分别有约50%和约60%转移至产物,提升管工艺化学品收率更高而氢消耗更少,体现出提升管工艺对原料氢有更高的利用效率。Fluid catalytic cracking(FCC)gasoline was used as feed,and a comparative study was conducted on the product distribution and properties of light olefins and aromatic chemicals produced by catalytic cracking of FCC gasoline in riser process and fluidized bed process.The differences in chemical yield and hydrogen balance between the two processes were also analyzed.The results showed that the fluidized bed process had a higher depth of FCC gasoline cracking,and exhibited higher yields of dry gas,liquefied petroleum gas,and coke,as well as higher aromatic content of gasoline products.The hydrogen transfer reaction in the riser process was weaker than that of fluidized bed process,and the content of light olefins in the gas products was significantly higher than that in the fluidized bed process.As the reaction temperature increased,the increase in gas product yield in the riser process was higher,and the coke yield in the fluidized bed process promoted significantly.At a reaction temperature of 600 C,the light olefins yield in the riser process reached 30.77%,the aromatics yield reached 39.71%,and the total chemical yield reached 70.48%,which was more than 2 percentage points higher than the total chemical yield in the fluidized bed process.About 50% and 60% of the hydrogen of feed during the riser and fluidized bed process were transferred to the products,respectively.The riser process had a higher chemicals yield and less hydrogen consumption,indicating that the riser process had higher utilization efficiency for hydrogen in feed.

关 键 词：催化裂化汽油 催化裂解 低碳烯烃 芳烃 提升管 流化床 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]