二苯并噻吩在催化裂化过程中的转化规律研究  

STUDY ON THE TRANSFORMATION OF DIBENZOTHIOPHENE IN FCC PROCESS

作　　者：崔琰[1] 高永灿[1] 姜楠[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2011年第6期6-10,共5页Petroleum Processing and Petrochemicals

摘　　要：在小型固定流化床（FFB）装置上以二苯并噻吩（DBT）十六烷体系为原料，研究DBT在催化裂化过程中的转化规律。结果表明，在反应温度500℃、剂油质量比6、空速10h^-1’的条件下，DBT的转化率为45％左右。在DBT参与的反应中，烷基化反应占主要地位。DBT转化为甲基苯并噻吩的比例最高，其次为C2～C3的烷基二苯并噻吩。DBT十六烷反应体系的硫90％左右分布在催化裂化液体产品中，少量反应生成硫化氢，少量进入焦炭中。DBT的加入降低了十六烷的转化率，促使干气生成，汽油产率减少，柴油产率增加，焦炭产率显著增加。The transformation mechanism of dibenzothiophene （DBT） in FCC process was studied on a fixed fluidized bed unit in laboratory using DBT containing hexadecane as feed. Test results showed that under the conditions of a reaction temperature of 500 ℃ ,a catalyst to oil mass ratio of 6 and a space velocity of 10 h^-1 ,the conversion of DBT was about 45%. Alkylation reactions were the main reactions in which DBT took place. The main product was methtyl-benzothiophene and followed by C2-C5 alkyl DBT. Nearly 90 percentage of the sulfur in the DBT-hexadecane reaction system was distributed in the liquid products,only a small portion was converted to H2S and coke. The presence of DBT reduced the conversion of hexadecane, the yield of gasoline fractions decreased, the yields of dry gas, diesel fractions and coke increased.

关 键 词：催化裂化 二苯并噻吩 硫分布 十六烷 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]