Author:
Ghobashy Mohamed Mohamady,Rashad A. M.,Attia S. K.,Elsayed A. E.,Osman D. I.
Abstract
AbstractThe deposition of paraffin on pipelines during crude oil transit and low-temperature restart processes poses a significant challenge for the oil industry. Addressing this issue necessitates the exploration of innovative materials and methods. Pour point depressants (PPDs) emerge as crucial processing aids to modify paraffin crystallization and enhance crude oil flow. This study focuses on the combustion of polyethylene terephthalate (PET) waste, a prevalent plastic, in two distinct oils (castor and jatropha). The resulting black waxy substances (PET/Castor and PET/Jatropha) were introduced in varying weights (1000, 2000, and 3000 ppm) to crude oil. The PET/castor oil combination demonstrated a remarkable reduction in pour point from 18 to −21 °C at 3000 ppm concentration, significantly more effective than PET/jatropha blends. Substantial decreases in viscosity (up to 75%) and shear stress (up to 72%) were also observed for both blends, most prominently at lower temperatures near the pour point. The synergistic effect of PET and oils as nucleating agents that alter crystallization patterns and restrict crystal growth contributes to this enhanced low-temperature flow. This highlights the potential of PET plastic waste as an economical, abundant, and eco-friendly additive to develop high-performance PPDs for crude oil.
Funder
Egyptian Atomic Energy Authority
Publisher
Springer Science and Business Media LLC
Reference36 articles.
1. Ajienka, J. & Ikoku, C. Waxy crude oil handling in Nigeria: Practices, problems, and prospects. Energy Sour. 12, 463–478 (1990).
2. Eke, W. I., Ituen, E., Yuanhua, L. & Akaranta, O. Laboratory evaluation of modified cashew nut shell liquid as oilfield wax inhibitors and flow improvers for waxy crude oils. Upstream Oil Gas Technol. 8, 100068 (2022).
3. Li, N., Mao, G., Shi, X., Tian, S. & Liu, Y. Advances in the research of polymeric pour point depressant for waxy crude oil. J. Dispersion Sci. Technol. 39, 1165–1171. https://doi.org/10.1080/01932691.2017.1385484 (2018).
4. Wei, B. Recent advances on mitigating wax problem using polymeric wax crystal modifier. J. Petrol. Explor. Prod. Technol. 5, 391–401 (2015).
5. Mohammed, A., Dhedan, R. M., Mahmood, W. A. & Musa, A. Copolymers of castor and corn oils with lauryl methacrylate as green lubricating additives. Egypt. J. Chem. 64, 4271–4276 (2021).