EXPERIMENTAL STUDY ON SHORT WEATHERING PROCESSES OF TYPICAL OIL PRODUCTS FROM THE BOHAI SEA
To investigate the short-term weathering process of oil spills at sea,five typical oil products currently produced from the Bohai Sea,North China,were selected to explore the specific effects of evaporation,emulsification,and submergence on the oil products.Results show that the thickness of oil film,wind speed,and temperature significantly affected the evaporation process,while the formation and stability of emulsified substances were closely related to the content of colloids and asphaltenes.The evaporation process mainly caused changes in oil density,while the emulsification process significantly affected both oil density and viscosity.It is particularly noteworthy that in the high temperature range,the effect of temperature on evaporation rate showed a relatively weakening trend,and the evaporation rates of ship fuel oil and No.10 diesel exhibited higher sensitivity to wind speed.In addition,the submergence process of low-viscosity oil products was shown to be mainly affected by small-sized suspended particles,while large-sized particles were more likely to promote the submergence of high-viscosity oil products.Based on the experimental data,empirical equations were established to describe the correlation between evaporation rate,emulsification rate,and submergence rate with environmental factors and oil product properties.The empirical equations achieved a good fit,with high correlation coefficient value of～0.9 when describing the effects of oil film thickness,wind speed,and temperature on the weathering process,indicating high accuracy.The experimental results and empirical equations provide a useful tool for describing oil spills behavior and predicting their movement at sea,which is helpful for developing more accurate emergency response strategies for oil spill incidents at sea.
万方数据
维普
