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Analysis of The Asphaltene Properties of Heavy Crude Oil under Ultrasonic and Microwave irradiation
Journal of Analytical and Applied Pyrolysis ( IF 6 ) Pub Date : 2018-01-01 , DOI: 10.1016/j.jaap.2017.11.015
Jaber Taheri-Shakib , Ali Shekarifard , Hassan Naderi

Abstract Using new technologies are quite significant in the production and development of heavy oil reservoirs. In this study, the effects of microwave (MW) and ultrasonic (US) waves on the properties of Ellam heavy crude oil of the southwest oil reservoirs of Iran have been investigated. Experimental results show that different processes occur in samples under MW radiation for 5, 10, 15 and 20 min. Under MW for 5 and 10 min we have viscosity reductions from 15.836 mPa.s to 12.234 mPa.s and 11.122 mPa.s, respectively. This is due to volume expansion with decreasing viscosifying component and high absorption capacity of heavy molecules of oil toward MW that charges the cracking process. US waves increase the viscosity of oil for all time durations because the power from US waves causes the evaporation of light compounds. Next, the effect of MW and US radiation on the asphaltene clusters using microscopic images was investigated. Results of asphaltene particle size distribution show that increasing duration of wave radiation makes the particles smaller, and the size range of asphaltene particles in the samples under MW radiation is much smaller than for the samples under US wave radiation. Moreover, in samples under MW radiation, the large particles cannot be seen. Consequently, the average particle size of asphaltene is smaller in samples under US wave radiation. But the particle size range is high, and large-sized particles in different time intervals of US radiation are observed. The results of scanning electron microscopy show that microwaves make the asphaltene conglomerate forming particles smaller and more regular in shape than the primary state, whereas ultrasonic waves completely alter the structure of the asphaltene particles, creating asphaltene clusters with a different structure. Based on the Fourier transform infrared spectra, ultrasonic exposure increases the cracking rate of the weaker bands and the condensation of aliphatic bands more than does exposure to microwaves, due to an increase in the intensity of the spectra.

中文翻译:

超声波和微波辐照下重质原油沥青质性质分析

摘要 新技术的应用在稠油油藏的生产和开发中具有重要意义。在这项研究中,研究了微波 (MW) 和超声波 (US) 波对伊朗西南油藏 Ellam 重质原油性质的影响。实验结果表明,样品在 MW 辐射下 5、10、15 和 20 分钟会发生不同的过程。在 MW 下 5 分钟和 10 分钟,我们的粘度分别从 15.836 mPa.s 降低到 12.234 mPa.s 和 11.122 mPa.s。这是由于随着增粘组分的减少和油的重分子对裂化过程充电的 MW 的高吸收能力而导致的体积膨胀。美国波浪在所有时间段内都会增加石油的粘度,因为美国波浪的能量会导致轻质化合物的蒸发。下一个,使用显微图像研究了 MW 和 US 辐射对沥青质簇的影响。沥青质粒径分布结果表明,随着波辐射时间的增加,颗粒变小,MW辐射下样品中沥青质颗粒的粒径范围比美国波辐射下样品小得多。此外,在 MW 辐射下的样品中,看不到大颗粒。因此,在美国波辐射下,样品中沥青质的平均粒径较小。但粒径范围大,在美国辐射的不同时间间隔内观察到大尺寸颗粒。扫描电镜结果表明,微波使沥青质砾岩形成颗粒比原始状态更小、形状更规则,而超声波完全改变了沥青质颗粒的结构,产生了具有不同结构的沥青质簇。基于傅里叶变换红外光谱,由于光谱强度的增加,超声波暴露比暴露于微波更能增加较弱波段的破裂率和脂肪族波段的凝聚。
更新日期:2018-01-01
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