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Ultrasound-assisted weak acid hydrolysis of crystalline starch nanoparticles for chemical enhanced oil recovery

Agi, Augustine and Junin, Radzuan and Arsad, Agus and Abbas, Azza and Gbadamosi, Afeez and Azli, Nur Bashirah and Oseh, Jeffrey (2020) Ultrasound-assisted weak acid hydrolysis of crystalline starch nanoparticles for chemical enhanced oil recovery. International Journal of Biological Macromolecules, 148 . pp. 1251-1271. ISSN 0141-8130

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Official URL: http://dx.doi.org/10.1016/j.ijbiomac.2019.10.099

Abstract

Ascorbic acid was used for the first time to synthesize crystalline starch nanoparticles (CSNP). The physical properties of the CSNP were investigated. Rheological properties of the crystalline starch nanofluid (CSNF) were compared with native cassava starch (CS) and commercial polymer xanthan. Interfacial properties of the CSNF at the interface of oil and water (O/W) were investigated at different concentrations and temperatures. Wettability alteration efficiency of CSNF on oil-wet sandstone surface was investigated using the sessile drop method. Core flooding experiment was conducted at reservoir conditions. The methods were effective in producing spherical and polygonal nanoparticles with a mean diameter of 100 nm and increased in crystallinity of 7%. Viscosity increased with increase in surface area and temperature of the CSNF compared to a decrease in viscosity as the temperature increases for xanthan. Interfacial tension (IFT) decreased with increase in concentration of CSNF, electrolyte and temperature. The results show that CSNF can change the wettability of sandstone at low concentration, high salinity and elevated temperature. Pressure drops data shows stability of CSNF at 120 °C. The formation of oil bank was enough to increase oil recovery by 23%.

Item Type:Article
Uncontrolled Keywords:enhanced oil recovery, nanoparticles, ultrasonic
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:93796
Deposited By: Yanti Mohd Shah
Deposited On:31 Dec 2021 08:51
Last Modified:31 Dec 2021 08:51

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