萘系化合物对FCC油浆富含芳烃馏分油制备的针状焦组成和结构的影响  

EFFECT OF NAPHTHALENE COMPOUNDS ON THE COMPOSITION AND STRUCTURE OF NEEDLE COKE PREPARED BY AROMATIC ENRICHED FRACTION FROM FCC SLURRY

作　　者：刘琦[1] 孙昱东[1] Liu Qi;Sun Yudong(College of Chemistry and Chemical Engineering,China University of Petroleum,Qingdao,Shandong 266580)

机构地区：[1]中国石油大学(华东)化学化工学院,山东青岛266580

出　　处：《石油炼制与化工》2023年第5期18-23,共6页Petroleum Processing and Petrochemicals

基　　金：山东省重点研发计划项目(2021ZLGX06)。

摘　　要：以石蜡基催化裂化油浆的富含芳烃馏分油为原料,添加不同萘系单体化合物(萘、1-甲基萘、四氢萘、十氢萘),通过两段焦化法制备针状焦。采用元素分析、傅里叶变换红外光谱、族组成分析等方法考察了萘系单体化合物对针状焦组成和结构的影响。结果表明,尽管在体系中添加的是小分子芳烃物种,随着萘系化合物含量的不断增加,对于碳质中间相的形成有着一定的促进作用;带有烷基侧链的芳烃通过自由基反应和氢转移反应可以提高体系的炭化活性,能够有效增加产物的缩合度;同时,具有环烷结构的芳烃也可通过开环反应和氢转移反应改变体系的流变性,降低体系黏度,从而降低产物缩合度。Needle coke was prepared by two-stage coking from aromatic fraction of paraffin-based catalytic cracking slurry(FCCDO)with the addition of different naphthalene compounds(naphthalene,1-methylnaphthalene,tetrahydronaphthalene and decahydronaphthalene).The influence of naphthalenes on the composition and the properties of needle coke was investigated by elemental analysis,FT-IR and group composition,etc.The results showed that the addition of small molecular aromatics promoted the formation of carbonaceous mesophase with the increasing of naphthalene content.Aromatics with alkyl chains could improve the carbonization activity of the system through free radical and hydrogen transfer reactions,which could effectively increase the condensation degree of the products.At the same time,the aromatics with naphthenic structure could also change the rheological properties of the system through ring-opening reaction and hydrogen transfer reaction,and reduce the viscosity of the system,thus reducing the condensation degree of the product.

关 键 词：催化裂化油浆 富含芳烃馏分 萘系化合物 针状焦 碳质中间相 

分 类 号：TE624[石油与天然气工程—油气加工工程]