加氢渣油催化裂化汽油诱导期短的原因分析及对策  

INFLUENCE FACTORS ANALYSIS AND COUNTERMEASURES FOR IMPROVING THE INDUCTION PERIOD OF FCC NAPHTHA FROM HYDROTREATED RESIDUE FEEDSTOCK

作　　者：吴世逵[1] 梁朝林[1] 徐柏福[2] 黄克明[1] 

机构地区：[1]茂名学院化工与环境工程学院,茂名525000 [2]中国石化股份公司茂名分公司

出　　处：《石油炼制与化工》2008年第8期50-54,共5页Petroleum Processing and Petrochemicals

基　　金：中国石化股份有限公司茂名分公司科技攻关项目

摘　　要：通过对催化裂化汽油组成、诱导期等性质指标的跟踪,分析了影响加氢渣油催化裂化汽油诱导期的主要因素。结果表明,二烯值大、酚含量低是加氢渣油催化裂化汽油诱导期短的主要原因。加氢渣油具有重组分裂解性能差、重金属含量高等特性,其催化裂化反应温度高、平衡催化剂沉积重金属(镍+钒)含量高,导致热裂化反应增多、氢转移反应减少,致使汽油中共轭二烯烃含量高。原料中氧含量低可导致汽油中酚含量低。通过采取优化催化裂化原料、优化操作条件、优化汽油调合及添加抗氧剂等措施可保证汽油诱导期合格。Based on collection and analysis the data of cracked naphtha compositions and induction period, factors affected the induction period are investigated. Results show that the main causes of low induction period of cracked naphtha are the high diene number and low phenol content. Due to the characteristics of hydrotreated residue, high heavy metals content and low crackability, the reaction temperature of RFCC is high and metals deposited on the equilibrium catalyst are heavy, therefore, thermal cracking reactions are enhanced and hydrogen transfer reactions are decreased, which leads to the high content of conjugated diene. Low oxygen content of hydrotreated residue feed leads to the low phenol content of naphtha. However,by optimizing the properties of FCC feedstock,operation conditions and gasoline blending, as well as adding some antioxidant, the induction period of gasoline meets the requirement.

关 键 词：加氢 渣油 催化裂化 汽油 诱导期 酚二烯值 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]