循环氢脱H_2S对催化汽油加氢脱硫效果的影响

Effect of H_2S Removal From Recycle Hydrogen on Hydrodesulfurization Efficiency of FCC Gasoline

中国石油大学(北京)与中国石油石化研究院联合开发了催化裂化(FCC)汽油选择性加氢脱硫-辛烷值恢复工艺(GARDES工艺),于2010年在中国石油大连石化公司20万t/a全馏分FCC汽油加氢装置进行了工业试验,重点比较分析了增加循环氢脱H2S措施对产品汽油脱硫率的影响:在保持产品汽油辛烷值损失不大于1个单位的前提下,脱硫率由71.4%增加到78.5%,且硫醇硫含量远远小于10×10-6,无需经脱硫醇处理。

The proprietary process GARDES（Gasoline Aromatization and Desulfurization） jointly developed by PetroChina petrochemical research institute and China university of petroleum（Beijing） has characteristics of selective hydrodesulfurization（HDS） and octane number recovery.In 2010,GARDES technology was industrially tested in 200 000 t/a full-range distillates FCC gasoline hydrogenation plant of Dalian petrochemical company successfully.The results obtained from performance test and routine operation of the plant show that,H2S removal from recycle hydrogen is necessary and it has obvious influence on the HDS efficiency of FCC gasoline.While maintaining no more than 1 unit of RON loss,the sulfur removal rate of the plant increases from 71.4% to 78.5%,mercaptan content is less than 10×10-6,therefore,demercaptan process is not needed any more..