噻吩类硫化物在催化裂化过程中转化规律的研究  

RESEARCH ON THE CONVERSION OF THIOPHENE DERIVATIVES UNDER CATALYTIC CRACKING CONDITIONS

作　　者：吴群英[1] 达志坚[1] 朱玉霞[1] 宋海涛[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》2012年第12期29-34,共6页Petroleum Processing and Petrochemicals

摘　　要：采用固定流化床实验装置,以噻吩、2-丁基噻吩和苯并噻吩为模型化合物,研究了不同结构的噻吩类硫化物在催化裂化条件下的反应特性和产物硫分布规律。结果表明:噻吩和苯并噻吩的转化率均较低(小于20%),产物主要分布在焦炭和液体中,很难发生裂化脱硫反应;2-丁基噻吩具有较高的反应活性,主要发生脱烷基、侧链裂化和裂化脱硫反应,气体硫的选择性达到28%左右。对于Y型分子筛催化剂,噻吩类硫化物的产物收率和硫分布选择性均与转化率呈很好的线性关系。Reaction performances of thiophene, 2-butylthiophene and benzothiophene were investi- gated by a FFB device under catalytic cracking conditions, and their, reaction mechanisms and product sulfur distributions were discussed in detail. Results showed that the conversion of thiophene and benzo- thiophene were rather low （less than 20%）, cracking to H2S was hard to happen in this case, thereby high selectivity of coke and liquid product was observed. As to 2-butylthiophene, it was quite active un- der catalytic cracking conditions, reactions including dealkylation, cracking of side chain and desulfuriza- tion took place mainly; in reaction product, sulfur distributed in gas reached 28%. With zeolite Y cata- lysts, good linear relationships existed in product yield-conversion, product sulfur distribution-conver- sion for thiophene species.

关 键 词：噻吩 苯并噻吩 催化裂化 硫 氢转移 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]