The use of physical fields to treat and degrade petroleum products has sparked considerable controversy. To our knowledge, no work studying the effects of the ultrasonic treatment of lube base oil (LBO) has been conducted to date. Terahertz time-domain spectroscopy (THz-TDS) was employed to characterize the optical parameters of LBO subjected to annealing and ultrasonic treatments. Specifically, for an LBO with a higher alkane content, annealing and ultrasonic methods can effectively increase its kinematic viscosity (KV), whereas the KV of LBO with a higher aromatic content is reduced under an ultrasonic field during 4, 6 and 12 h sonication treatments. The degradation mechanism was determined for each method based on the characteristic absorption peaks in the THz region. The results indicated THz-TDS has great potential for the identification of degradation mechanisms in the petroleum industry.

使用物理场来处理和降解石油产品引起了很大的争议。据我们所知，迄今为止，尚未进行任何研究润滑油基础油（LBO）超声处理效果的工作。太赫兹时域光谱（THz-TDS）用于表征经过退火和超声处理的LBO的光学参数。具体而言，对于烷烃含量较高的LBO，退火和超声方法可以有效地提高其运动粘度（KV），而在超声处理4、6和12 h的超声场下，芳烃含量较高的LBO的KV会降低。 。根据THz区域中的特征吸收峰，确定每种方法的降解机理。