Piroozian, A. and Hemmati, M. and Ismail, I. and Manan, M. A. and Bayat, A. E. and Mohsin, R. (2016) Effect of emulsified water on the wax appearance temperature of water-in-waxy-crude-oil emulsions. Thermochimica Acta, 637 . pp. 132-142. ISSN 0040-6031
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Abstract
The article concentrates on the effect of emulsified water on the wax appearance temperatures (WATs) of water-in-waxy-crude-oil emulsions. Water-in-oil (w/o) emulsion samples with various water volume fractions (WVFs) were prepared by mixing a waxy crude oil with deionized water at three different stirring speeds. The WAT of each sample was attained via differential scanning calorimetry and was compared with that of the dehydrated crude. In addition, the effects of the WVF and the mean droplet size on the WAT of the emulsions were theoretically evaluated based on the relationship between the wax solubility in the crude oil and the Gibbs free energy concept. The results indicate a sharp increase in the WAT with the presence of water in the system, regardless of the volume of water. Greater deviations became apparent at higher WVFs and rotational speeds, which resulted in the formation of a larger number of droplets.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Calorimeters, Calorimetry, Deionized water, Differential scanning calorimetry, Drops, Emulsification, Emulsions, Free energy, Gibbs free energy, Mean droplet size, Presence of water, Rotational speed, Water in oil emulsions, Water volume fraction, Wax appearance temperature, Wax solubility, Waxy Crude Oil, Crude oil |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Chemical Engineering |
| ID Code: | 72204 |
| Deposited By: | Fazli Masari |
| Deposited On: | 21 Nov 2017 03:28 |
| Last Modified: | 21 Nov 2017 03:28 |
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