Wax Behavior in Crude Oils by Pour Point Analyses

Abstract

Crude oils containing large quantities of waxes, and in situations where sudden temperature drops occur, a crystalline network can be formed, generating flow difficulties in production, transfer and offloading lines. Despite the scientific and economic importance of this phenomenon, correlations between the behavior of petroleum in relation to its pour point are scarce in the literature. In this work, nine crude oil samples were characterized regarding density, water content, wax fraction (one-and two-dimensional chromatography), pour point, yield stress and wax appearance temperature. The results showed that the storage conditions and oil characteristics had a strong influence on the pour point. Yield stress was influenced by initial temperature of the sample, cooling rate and shear rate during cooling. Finally, the content of aromatic compounds in oil with low concentration of n-alkanes can contribute to increase the pour point.

Chemical Characterization and Interfacial Activity of Molecules Isolated from Brazilian Oils by Adsorption onto Wet Silica Particles

“…Deuterated chloroform (99.8%) was supplied by Scielab (Rio de Janeiro, Brazil). The crude oil samples used in this study were from a set of samples donated by Petrobras, designated as P5 and P6, presenting an °API of 17.3 and 14.8 and asphaltene content of 1.6 and 3.01% m/m, respectively …”

“…The crude oil samples used in this study were from a set of samples donated by Petrobras, designated as P5 and P6, presenting an °API of 17.3 and 14.8 and asphaltene content of 1.6 and 3.01% m/m, respectively. 27 2.2. Isolation by the Wet Silica Method.…”

The effects of SKO on Assam crude oil

“…Both situations tend to increase the gel strength, possibly explaining why the equilibrium time of CO flow through the pipeline is higher [ 58 ]. In general, COs with high PP values have higher YS values which creates difficulty to restart the flow through the pipeline [ 59 ].…”

Advanced Study of Promoted Pt /SAPO-11 Catalyst for Hydroisomerization of the n-Decane Model and Lube Oil

“…This conclusion was supported by Thomas et al, [30] . A comparison for hydroisomerization of lubricating oil using two types of promoters on SAPO-11, the first one Pt/SAPO-11 and the second using Pt Zr W/SAPO-11 shows that Pt Zr W/SAPO-11 gives a lower point (Reducing pour point from -13°C by using Pt/SAPO-11 to -16°C when using Pt Zr W/SAPO-11) which means that the addition of these promoters (0.51% Zr and 1.1% W, which measured by XRF) can enhance the catalyst activity [31].…”