非石油基油品对渣油掺稀降黏效果及掺稀模型研究

摘要

In this work,three kinds of non-petroleum solvents (coal tar light oil,shale oil,and coal tar diesel) were used as solvents for viscosity reduction of residue oil.The influence of temperature,solvent,and solvent/residue ratio on viscosity reduction of residue was tested.A theoretical equation for liquid viscosity derived from the differential equation for a model of argon gas is extended to describe the temperature-viscosity relationship of blending mixture of residue and solvent,and establish a residue dilution model.The test results show that three kinds of non-petroleum-based solvents can be used to reduce the viscosity of residue.The viscosity of the mixture is reduced more significantly as the blending ratio increases.At a solvent/residue ratio of 0.3,the shale oil and coal tar light oil exhibit a better viscosity reduction effect.It is believed that the asphaltene association by solvent may be the important factor for viscosity reduction of residue.The established model proves that the calculated values are in good agreement with observations and the model parameters reflect the average molecular composition and the relationship of temperature and viscosity of blending residue.%采用水上油、页岩油和煤柴油等3种非石油基稀油对渣油进行掺稀降黏,考察了温度、稀油类型和掺稀比(稀油与调合油的质量比)对调合油黏温关系的影响,并基于实验数据,将由氩模型微分方程导出的液体黏度理论方程拓展应用到渣油掺稀调合油的黏温关系描述中,建立渣油掺稀黏度模型.结果表明:3种非石油基稀油均能够用于对渣油进行掺稀降黏,掺稀比越高,调合油黏度降低幅度越大,在掺稀比低于0.3的条件下,页岩油和水上油降黏效果较好;稀油对渣油沥青质基本片层结构的缔合作用力的影响是造成调合油黏度降低的重要原因;所建模型的计算值与实验值吻合较好,模型参数反映了调合油的分子构成,能较好地描述渣油掺稀降黏的黏温关系.