催化裂化汽油选择性加氢脱硫工艺流程选择  

OPTIONS OF SELECTIVE HYDRODESULFURIZATION PROCESS SCHEME FOR TREATING FCC GASOLINE

作　　者：李明丰[1] 习远兵[1] 潘光成[1] 聂红[1] 

机构地区：[1]石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2010年第5期1-6,共6页Petroleum Processing and Petrochemicals

基　　金：国家重点基础研究发展计划(973项目;2006CB202506);国家科技支撑计划(2007BAE43B01)

摘　　要：研究了催化裂化汽油加氢脱硫各种可能的加工流程。结果表明,将汽油切割成轻重馏分分别进行处理,可以大幅度减少汽油烯烃在加氢脱硫过程中的饱和;轻馏分汽油中硫醇可以通过碱抽提方式脱除,不影响汽油烯烃含量;由于汽油中的二烯烃在较缓和条件下能促进胶质的生成,需要进行选择性脱二烯烃;由于循环氢中的硫化氢对加氢脱硫反应有抑制作用、对烯烃饱和反应有促进作用,应增加循环氢脱硫化氢系统;产品中的硫醇可经固定床氧化脱除。根据催化裂化汽油原料特性、反应动力学及工业应用需要确定选择性加氢脱硫的工艺流程。A variety of hydrodesulfurization process schemes for treating FCC naphtha was discussed and compared. It is found that cutting FCC naphtha into a light cracked naphtha fraction （LCN） and a heavy cracked naphtha fraction （HCN） treating respectively can significantly reduce the rate of olefin saturation during hydrodesulfurization process. The mercaptans in LCN can be removed by alkaline extraction and the olefin content of LCN is not affected significantly. Adding a reactor to selectively remove diene in HCN is necessary, due to the formation of gum is promoted by diene under relatively mild conditions. The existence of hydrogen sulfide in recycle hydrogen may suppress hydrodesulfurization reactions and promote olefin saturation, thus a system for removing hydrogen sulfide in recycle hydrogen is required. The mercaptans in product can be removed by fixed-bed oxidation. Finally, based on the above findings, considering the feedstock properties, reaction kinetics and commercial requirements, a selective hydrodesulfurization process scheme is determined.

关 键 词：催化裂化 汽油 选择性 加氢脱硫 流程 硫醇 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]