Gao Jinbiao, Li Chao, Xu Delong, Wu Pengfei, Lin Weijun, Wang Xiuming
State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China; Beijing Engineering Research Center of Sea Deep Drilling and Exploration, Beijing 100190, China.
State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; Beijing Engineering Research Center of Sea Deep Drilling and Exploration, Beijing 100190, China.
Ultrason Sonochem. 2021 Dec;81:105842. doi: 10.1016/j.ultsonch.2021.105842. Epub 2021 Nov 26.
Viscosity reduction of heavy oil has economic benefits and applicational value in the field. Applying viscosity reduction technology of heavy oil with ultrasound, this paper examines the influence of ultrasonic irradiation time and the addition of tetralin and ethylene glycol on viscosity reduction of heavy oil. Fourier Transform Infrared Spectrometer (FTIR) and Gas Chromatograph (GC) were used to analyze the chemical compositions and structural changes of oil samples before and after ultrasonic irradiation, and the effects of ultrasound on viscosity changes are presented. The viscosity reduction rate (VRR) was best at an irradiation time of 6 mins under the current experimental conditions, with VRR reaching more than 80%. When the irradiation time reached 12 mins, the viscosity of oil samples increased conversely. Chemical analysis reveals that the light components in the oil samples increased after the ultrasonic irradiation, indicating that the cavitation, thermal, and mechanical effects of ultrasound could play a role in breaking long chains of carbon, thus reducing the viscosity. The increase in viscosity may have been caused by a reassociation between molecules and/or the coking of heavy oil.
稠油降粘在该领域具有经济效益和应用价值。本文采用超声波对稠油进行降粘技术研究，考察了超声辐照时间以及添加四氢萘和乙二醇对稠油降粘的影响。利用傅里叶变换红外光谱仪（FTIR）和气相色谱仪（GC）分析了超声辐照前后油样的化学组成和结构变化，并阐述了超声对粘度变化的影响。在当前实验条件下，辐照时间为6分钟时降粘率（VRR）最佳，VRR达到80%以上。当辐照时间达到12分钟时，油样粘度反而增加。化学分析表明，超声辐照后油样中的轻组分增加，这表明超声的空化、热和机械效应可能在断裂长碳链方面发挥作用，从而降低粘度。粘度增加可能是由于分子重新缔合和/或稠油结焦所致。
