Journal ArticleDOI
Comparison of wax appearance temperatures of crude oils by differential scanning calorimetry, thermomicroscopy and viscometry
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TLDR
In this paper, the results of an experimental study of the determination of wax appearance temperatures (WAT) of 15 crude oils by differential scanning calorimetry (d.s.c.), thermomicroscopy and viscometry were presented.About:
This article is published in Fuel.The article was published on 1996-05-01. It has received 97 citations till now. The article focuses on the topics: Wax.read more
Citations
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Journal ArticleDOI
The Limitations of the Cloud Point Measurement Techniques and the Influence of the Oil Composition on Its Detection
TL;DR: In this paper, several cloud point measurement techniques are discussed and compared, and it is shown that some of these techniques, such as viscosity, filter plugging, and differential scanning calorimetry (DSC), can only be used under very favorable circumstances, but it is argued that every technique requires some finite, often large, amount of solid to detect the presence of a new phase, the cloud point, defined as the temperature for which the first solid appears in the oil, is n...
Journal ArticleDOI
A new perspective on the measurements of wax appearance temperature: Comparison between DSC, thermomicroscopy and rheometry and the cooling rate effects
TL;DR: In this paper, the effects of cooling rate on the wax appearance temperature and wax aggregation as well as the WAT comparison from the various equipments under cooling rate of 1 ˚C/min are explored and discussed in detail.
Journal ArticleDOI
Determination of Wax Precipitation Temperature and Amount of Precipitated Solid Wax versus Temperature for Crude Oils Using FT-IR Spectroscopy
TL;DR: In this paper, a novel FT-IR spectroscopy method is described for the determination of the wax precipitation temperature (WPT), and the estimation of the amount of precipitated solid wax material (both crystalline and amorphous) present in petroleum crude oils.
Journal ArticleDOI
Measurement of the wax appearance temperatures of crude oils by temperature modulated differential scanning calorimetry
TL;DR: In this paper, a commercial implementation of temperature modulated differential scanning calorimetry (TMDSC) is used for the first time to measure the wax appearance temperature (WAT) of crude oil samples.
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Performance improvement of the ethylene-vinyl acetate copolymer (EVA) pour point depressant by small dosages of the polymethylsilsesquioxane (PMSQ) microsphere: An experimental study
TL;DR: In this article, the effect of the ethylene-vinyl acetate copolymer (EVA2806) PPD together with the polymethylsilsesquioxane (PMSQ) microsphere (with the size around 2µm) on the flow behavior of a typical waxy crude oil was investigated.
References
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Journal ArticleDOI
Wax Precipitation from North Sea Crude Oils. 1. Crystallization and Dissolution Temperatures, and Newtonian and Non-Newtonian Flow Properties
TL;DR: In this paper, the authors found that the pour point of thermally pretreated oil (minimum pour point) was in most cases 40-60 "C lower than the WPT, and on average about 4 wt % precipitated wax was present at the minimum pour point.
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Properties of Pure Normal Alkanes in the C17 to C36 Range
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Crude oils: characterization of waxes precipitated on cooling by d.s.c. and thermomicroscopy
TL;DR: In this paper, a mixture of 2 and 4 wt% of pure paraffins in a crude oil matrix and 14 crude oils were characterized by differential scanning calorimetry (d.s.c.) and thermomicroscopy at a cooling rate of 2 K min−1 in the temperature range from +80 to −20°C.
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Crude oils and their distillates: characterization by differential scanning calorimetry
TL;DR: Differential scanning calorimetry (d.s.c.) has been used to characterize crude petroleum and a thermal fingerprint can be obtained in a short time with a single experiment as discussed by the authors.
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Starting Behavior of Gathering Lines and Pipelines Filled with Gelled Prudhoe Bay Oil
T.K. Perkins,J.B. Turner +1 more
TL;DR: The rheology of Prudhoe Bay crude oil has been systematically studied in concentric-cylinder viscometers as mentioned in this paper, showing that it behaves as a pseudoplastic material to very low values of shear rate, but grades into a Newtonian-like behavior at high shear rates.