The influence of pressure and dissolved gases in petroleum on the efficiency of wax deposition inhibitors
Електронний науковий архів Науково-технічної бібліотеки Національного університету "Львівська політехніка"
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
The influence of pressure and dissolved gases in petroleum on the efficiency of wax deposition inhibitors
Вплив тиску і розчинених у нафті газів на ефективність інгібіторів парафінових відкладів |
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| Creator |
Vieira, Lenise
Buchuid, Maria Lucas, Elizabete |
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| Subject |
high pressure mDSC
viscosity crude oil paraffin wax crystallization deposition inhibitors |
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| Description |
Evaluations of wax inhibitors carried out in laboratories are generally performed on stabilized oil samples, that is, without the presence of natural gas and at atmospheric pressure. Therefore, the effects of two important factors that influence wax solubility – the light fractions and temperature – are not considered, and the results may not reflect what really happens in production lines and facilities. This work evaluates the efficiency of two wax inhibitors based on ethylene copolymer and vinyl acetate, at four concentrations, in a sample of paraffin oil in the presence of light fractions and under pressure. The parameter employed in the evaluation was the wax appearance temperature (WAT), or the cloud point, determined by high-pressure differential scanning calorimetry. The gas used was a mixture of eight components and the tests were run at three pressures. In general, the inhibitors had little influence on the cloud point and a pronounced effect on the pour point and viscosity. In this case it was possible to observe changes in the WAT with both wax inhibitors in the tests conducted at atmospheric pressure up to 150 bar and in the presence of the multi-component gas mixture, suggesting that one of the mechanisms through which wax deposition inhibitors work is polynucleation. |
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| Date |
2009-09-14T08:39:28Z
2009-09-14T08:39:28Z 2008 |
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| Type |
Article
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| Identifier |
Vieira, L. The influence of pressure and dissolved gases in petroleum on the efficiency of wax deposition inhibitors / Lenise Vieira, Maria Buchuid, Elizabete Lucas // Chemistry & Chemical Technology. – 2008. – Volume 2, number 3. – P. 211–215. – Bibliography: 11 titles.
http://ena.lp.edu.ua:8080/handle/ntb/1559 |
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| Publisher |
Publishing House of Lviv Polytechnic National University
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