Abstract
The influence of the nano-hybrid pour point depressant (NPPD) on flow properties of waxy crude oil was studied. Rheological results showed that NPPD demonstrated better improvement in viscosity, yield stress and pour point reduction for crude oil than the conventional polymer PPD (N6) did. Moreover, the viscoelastic behavior data showed that the NPPD doped oil had a weaker gel network structure at a low temperature compared with N6 doped oil. Differential scanning calorimetry results revealed that NPPD reduced the wax appearance temperature (WAT) and the wax precipitation amount within the temperature range from WAT to −20°C. The difference of shape and size of wax crystals in undoped and doped oils was studied by X-ray diffraction and polarized optical microscopy. The total interaction energy between wax particles was calculated according to the Derjaguin–Landau–Verwey–Overbeek theory using ζ potential. It was found that the energy barrier between the wax particles in the NPPD doped oil was higher than that in N6 doped oil. The larger electrostatic repulsion inhibited the aggregation of the wax particles and stabilized the NPPD doped oil system.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
