Experimental studies on the effect of ultrasonic treatment and hydrogen donors on residual oil characteristics |
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Institution: | 1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;2. China University of Petroleum (Beijing), Beijing 102249, China;3. CNOOC EnerTech-Drilling & Production Co., Tianjin 300452, China;4. College of Chemical Engineering, China University of Petroleum (Huadong), Qingdao 266580, China;5. Department of Mechanical Engineering, Lassonde School of Engineering, York University, Toronto M3J 1P3, Canada |
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Abstract: | Residual oil, the residue after the distillation of crude oil, imposes deleterious effects on refinery due to its high viscosity and asphaltene content. In this context, ultrasonic technology has been widely applied in refining processes given its high efficiency and minimal environmental impacts. To guide the selection of operation parameters, in this work, we probed the effect of treatment duration, power, and hydrogen donor on the characteristics of residual oil under ultrasonic treatments. Underlying mechanisms of ultrasonic treatments, in the absence and presence of hydrogen donors, were verified through systematically analyzing viscosity, component conversion, molecular weight, hydrogen distribution, and functional groups of residual oil. While viscosity reductions under low-power density treatment are caused by colloidal system disaggregation, high-power density treatment can bring in both chemical bond cleavage and colloidal system disaggregation. In addition, adding hydrogen donor can effectively prevent radical recombination, and thus increases the yield of saturate. These results provide fundamental understandings on the effects of ultrasonic treatments. |
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Keywords: | Residual oil Ultrasonic treatment Viscosity reduction Component conversion Hydrogen donor |
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