渣油接触裂化产物特征分子组成分析  

Molecular Composition Analysis of Heavy Gas Oils From Residue Contact Cracking Process

作　　者：蔡新恒 张书红[1] 龙军[1] 刘颖荣[1] 刘泽龙[1] 王威[1] 田松柏[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油学报（石油加工）》2014年第6期957-966,共10页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点基础研究发展规划"973"项目(2012CB224801)资助

摘　　要：以正构烷烃、萜烷生物标志物、多环芳烃和芳香噻吩系列作为特征化合物,采用GC-MS方法对渣油原料KWTVR、QLVR和THAR分别在3种接触剂A、B和C作用下的裂化产物进行分析。结果表明,9种产物中特征化合物分布差异明显,其分布受渣油原料和接触剂类型影响。3种渣油原料中QLVR的接触裂化改质效果最好,B剂最适合用作渣油预处理改质的接触剂。萜烷生物标志物的特殊分子结构对热作用和催化作用类型比较敏感,可指示反应的类型以及裂化反应的深度。对于同种渣油原料,产物中多环芳烃和噻吩系列的分布情况与接触裂化所使用的接触剂的活性强弱顺序有对应关系。由渣油接触裂化重馏分油产物中特征化合物的分布情况可推测渣油接触裂化反应路径。Normal alkanes,terpanes, polycyclic aromatics and thiophenic compounds were designated as characteristic compounds to analyze the product distributions of nine heavy gas oils produced from the contact cracking processes of KWTVR,QLVR and THAR residues on agent A,B and C by using GC-MS method.The results demonstrated that the final distribution of targeted characteristic molecules in those heavy gas oil products were influenced and controlled by types of feedstock and contact agents.QLVR was most easily upgraded by contact cracking process and agent B was the most suitable for residue contact cracking.The unique molecular structure of terpane and hopane was hypersensitive to thermal or catalytic reaction,and they could be used for monitoring reaction type and depth.Meanwhile,the distribution mode of polycyclic aromatics and thiophenes in the heavy gas oil produced from residue contact cracking coincided well with microreactor activities of contact agents.Consequently,the reaction pathway of the residue contact cracking was proposed.

关 键 词：重馏分油 GC/MS 生物标志物 多环芳烃 接触裂化 

分 类 号：TE622[石油与天然气工程—油气加工工程]