摘要
采用色谱、质谱、元素分析、电位计等分析手段研究了中国石化石家庄炼油化工股份有限公司催化裂化汽油选择性加氢脱硫前后组成的变化。结果表明：加氢前后汽油中的氮化物均主要为碱性氮化物,加氢后总氮质量分数减少12.1个百分点,碱性氮化物质量分数减少8.3个百分点;汽油中的酚类主要为C1~2苯酚,苯酚和C3苯酚含量很少,加氢前后汽油中酚类的质量分数分别为0.14%和0.05%;加氢前汽油中的硫化物主要为噻吩和硫醚,硫醇含量较少且为C5~8硫醇;加氢后汽油中的硫化物主要为噻吩和硫醇,硫醚含量较少;加氢前后,硫醇质量分数由48.9×10-6降低到15.6×10-6,总硫质量分数由924.6×10-6降低到43.0×10-6;加氢后汽油的异构烷烃质量分数增加5.55个百分点,烯烃质量分数降低10.12个百分点（饱和率为31%）,环烷烃质量分数增加2.95个百分点。
A series of analytical methods such as chromatograghy,mass spectrometry,elementary analysis and potentiometer,were used for analyzing the composition of fluidized-bed catalytic cracking（FCC） gasoline of Shijiazhuang Refinery before and after selective hydrodesulfurization（SHDS）.The results showed that the nitrogen compounds were mainly composed of basic nitrogen,and after SHDS the mass fractions of total nitrogen and basic nitrogen decreased by 12.1 and 8.3 percentage points respectively,and the species of basic nitrogen remained unchanged.The phenols compounds were mainly consisted of C1 and C2 phenol,including a little C3 phenol and phenol.And the mass fractions of phenols were 0.14% and 0.05% respectively before and after SHDS.The mass fraction of mercaptan was decreased from 48.9×10-6 to 15.6×10-6,and total sulfur decreased from 924.6μg/g to 43μg/g after SHDS.The mass fractions of the isoparaffins and the cycloparaffins increased by 5.55 and 2.95 percentage points respectively and the mass fraction of olefin decreased by 10.12 percentage points after SHDS.
出处
《石化技术与应用》
CAS
2011年第1期72-77,共6页
Petrochemical Technology & Application
关键词
催化裂化汽油
选择性加氢脱硫
氮化物
酚类
硫化物
族组成
fluidized-bed catalytic cracking gasoline
selective hydrodesulfurization
basic nitride
phenols
sulfide
group composition
