微波辐射峰值吸收频率对原油组分的影响

利用微波辐射降低原油粘度是一种新的高效处理方法,微波降粘效果取决于油样吸收微波的能量,油样对微波的吸收率取决于微波频率,因此油样最大能量吸收率所对应的微波频率定义为峰值吸收频率。基于微波二端口网络模型,利用自行设计的微波辐射实验设备进行研究,精确测量了待测油样的峰值吸收频率,并详细分析了频率对原油组分的影响。结果表明:在3.9 ~6.5 GHz 的扫描频率下,油样在频率为5.8 GHz 时出现第1个吸收频率且能量仅剩69.9%,在6.2 GHz 时出现第2 个吸收频率且能量仅剩36.4%,该频率为峰值吸收频率;运用GCMS分析经过5.8 GHz 和6.2 GHz 微波辐射后,轻组分(C7-C14)分别增加了7.6%、8.7%,重组分(C16 及以上碳数)分别减少12.4%、13.5%,原油组分发生明显的改变。研究结论为微波辐射技术在石油行业运用提供了重要的参考,证明了该技术具有良好的应用前景。

Effect of Peak Absorption Frequency on Crude Oil Components by Microwave Radiation

Reducing the viscosity of crude oil by microwave radiation is a new method of high efficiency, the effect of viscosity reducing depends on the energy of oil sample absorbing by microwave. The absorption rate of oil sample depends on microwave frequency, therefore, the microwave frequency corresponding to the maximum absorption rate is defined as the peak absorption frequency. Based on microwave two-port network model, and the microwave radiation experimental device designed by ourselves, the peak absorption frequency of the sample is accurately measured, and the influence of frequency on the crude oil component is analyzed in detail. The results show that at the 3.9~6.5 GHz scan frequency, there is first absorption frequency at 5.8 GHz and the energy remains 69.9%, the second absorption frequency at 6.2 GHz which is the peak absorption frequency and the energy remains 36.4%. Analysis of oil samples after 5.8 GHz and 6.2 GHz microwave radiation by GC-MS,light components (C7-C14) increased by 7.6% and 8.7% respectively, heavy components (C16 and above carbon atoms) decreased by 12.4% and 13.5% respectively,crude oil components changed obviously. It is shown that microwave technology provides an important reference and has a better application prospect in the field.