Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
INFLUENCE OF GRAPHENE ON THE RHEOLOGICAL PROPERTIES OF WAXY OIL
Submission Author:
rufino epesse , RS
Co-Authors:
rufino epesse, Cezar Otaviano Ribeiro Negrao, GÉSSICA PALAORO, Ricardo Jorge Espanhol Andrade, Nathália Maria Moraes Fernandes, Diogo Elias da Vinha Andrade
Presenter: rufino epesse
doi://10.26678/ABCM.COBEM2023.COB2023-0370
Abstract
In the reservoir, waxy crude oils are submitted to high pressures and high temperatures. In this condition, the hydrocarbons, which are the main components of crude oil, are dissolved in the liquid phase. During the production and transportation of the oil, the pipelines are in contact with the seafloor which is around 4ºC. At low temperatures, the solubility of high molecular weight components in the oil decreases and the n-paraffins tend to precipitate as crystal structures. Wax crystallization not only increases considerably the oil viscosity but also provides a solid-like structure to the material when the flow is interrupted. In these cases, high pressures are required to break up the gelled structure and consequently, to restart the flow. Different methods have been proposed in the literature to decrease the oil viscosity and the material yield stress. In the current study, the influence of graphene oxide (GO)nanoparticles on the rheological properties of model waxy oils is investigated. The analysis is performed by using a rotational rheometer in which the thermal and shear histories of the sample are controlled. Viscoelastic response, apparent viscosity, and yield stress of the model waxy oils samples with different proportion of nanoparticles were measured. It is speculated that certain concentration of GO nanoparticles decreases the viscosity and the material yield stress.
Keywords
graphene oxide, Model waxy oil, Rheology, yield stress.
