LCO高价值转化技术研究进展

Research progress of LCO high-value conversion technology

近年来柴油需求量逐年降低,LCO(催化裂化轻循环油)做为柴油池的主要成分出现了产能过剩的问题。解决LCO产能过剩的关键是合理利用LCO中丰富的二环芳烃组分,开发“宜芳则芳”转化新技术。从LCO结构组成出发,系统总结了6种以LCO为原料生产各种高价值产物的技术发展近况,对其主要流程和技术特点进行了总结。其中LTAG技术具有较高的高辛烷值汽油收率,但如何降低反应氢耗是较大的难题;LCO临氢转化为BTX是“油转化”技术的典型代表,但是氢耗高、BTX选择性偏低导致技术经济性不佳;LCO制备COPNA树脂技术在得到高性能B树脂同时副产高十六烷值柴油组分,但其使用的固化剂和交联剂仍存在价格昂贵的问题。最后对目前LCO生产高价值产物技术问题进行了总结和展望。

The demand for diesel has been decreasing year on year in recent years,LCO(light cycle oil of FCC unit),as the main component of diesel pools,has encountered the problem of overcapacity.The key to solving the overcapacity of LCO is to make reasonable use of the rich bicyclic aromatic hydrocarbon components in LCO and explore new technologies for the conversion of suitable aromatics to aromatics.Starting from the structural composition of LCO,this paper systematically summarizes the recent development status of six technologies for producing various high-value products using LCO as raw material.Among them,LTAG technology has a high yield of high octane gasoline,but reducing reaction hydrogen consumption is a major challenge;LCO preparation of BTX is an effective method for oil conversion,but high hydrogen consumption low selectivity of BTX lead to poor techno-economics;the preparation of COPNA resin by LCO can produce high-performance B resin with by-production of high cetane diesel components.However,the curing and crosslinking agents used still have the problem of being expensive.Finally,a summary and outlook were made on the current technical issues of LCO production of high-value products.