渣油沸腾床加氢反应产物体系稳定性研究  

STUDY ON COLLOID STABILITY OF RESIDUE DURING EBULLATED HYDROCRACKING

作　　者：孟兆会[1] 杨涛[1] 贾丽[1] 蒋立敬[1] 

机构地区：[1]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《石油炼制与化工》2013年第12期66-70,共5页Petroleum Processing and Petrochemicals

基　　金：国家863项目(No.2011AA05A203)

摘　　要：采用中国石化抚顺石油化工研究院(FRIPP)开发的STRONG沸腾床渣油加氢工艺,在中试装置上考察了伊朗与沙特轻质混合减压渣油在不同工艺条件下反应产物的四组分组成变化,并通过斑点试验、胶体稳定性指数及不稳定性参数法对反应产物稳定性进行了考察。结果表明:斑点试验可以直观预测反应产物体系胶体稳定性的变化趋势,在转化率为43%左右时,斑点成像图中出现明显内斑,体系开始变得不稳定;胶体稳定性指数可定量预测反应产物体系的稳定性变化,在转化率为43%左右时,胶体稳定性指数为0.7左右,此后稳定性指数明显下降,体系变得不稳定,这与斑点试验预测结果相符;不稳定性参数是对整个渣油反应体系抗稀释能力的整体考量,可以准确地定量反映渣油加氢反应产物体系在加氢过程中稳定性的变化,当不稳定性参数达到极大值(36)后,所考察渣油加氢产物体系的稳定性开始明显变差。实际应用中,可以以不稳定性参数法为主,以斑点试验法为辅,协同判断待测油样的稳定性情况,进而为工业生产提供指导。The vacuum residue that consists of SARA is usually considered as a stable colloid sys- tem. The changes of SARA of vacuum residue from Saudi and Iran light crude under different conditions in STRONG ebullated processing were investigated. The relations of the conversion and the stability of the systems during processing were analyzed by Spot test, Separability Number test and Colloid Stabili ty Index （CS1） test. The results indicate that Spot test can directly reflect the trend of the stability of the system. The inner spot begins to emerge in spot imaging figure when the conversion reaches to 43~/oo, indicating the system turns into unstable. CSI can quantitatively predict the stability varia tion. The system becomes unstable if CSI is smaller than 0.7, in accord well with the Spot test results; Based on the ability to resist dilution of the overall system, Separability Number has more accurate re suits than the other two methods, and when the Separability Number is larger than 36, the system be comes unstable obviously.

关 键 词：渣油 沸腾床 胶体稳定性 斑点试验 不稳定性参数 

分 类 号：TE621[石油与天然气工程—油气加工工程]