Application of Low-Field NMR for the Determination of Physical Properties of Petroleum Fractions
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- 作者：L煤cio L. Barbosa ; Fl谩vio V. C. Kock ; Renzo C. Silva ; Jair C. C. Freitas ; Valdemar Lacerda ; Jr. ; Eust谩quio V. R. Castro
- 刊名：Energy & Fuels
- 出版年：2013
- 出版时间：February 21, 2013
- 年：2013
- 卷：27
- 期：2
- 页码：673-679
- 全文大小：394K
- 年卷期：v.27,no.2(February 21, 2013)
- ISSN：1520-5029
文摘
We propose the use of the low-field 1H NMR technique to predict various properties of petroleum fractions with 掳API ranging from 21.7 to 32.7. The experimental data obtained by standard methodologies (ASTM D-1218, D 445-06, D-664-06, D-2892, and D-4052) were correlated with the mean values of the 1H transverse relaxation time in the range between 25 and 675 ms. Results of the present work showed good correlations between the NMR relaxation data with viscosity, total acid number, refractive index, and API gravity. The main advantage of the proposed method is its nondestructiveness, together with its speed and the fact that it does not require solvents/dilution. This allows the assessment of several properties of petroleum fractions simultaneously, based on the output of only one NMR experiment, leading to large economy in terms of energy, time, and costs.