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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Ultrasound-assisted weak-acid hydrolysis of crystalline starch nanoparticles for chemical enhanced oil recovery
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Ultrasound-assisted weak-acid hydrolysis of crystalline starch nanoparticles for chemical enhanced oil recovery

机译：结晶淀粉纳米粒子的超声辅助弱酸水解，用于化学增强的采油

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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 degrees C. The formation of oil bank was enough to increase oil recovery by 23%. (C) 2019 Elsevier B.V. All rights reserved.
机译：第一次使用抗坏血酸以合成结晶淀粉纳米颗粒（CSNP）。研究了CSNP的物理性质。将结晶淀粉纳米流体（CSNF）的流变性质与天然木薯淀粉（CS）和商业聚合物黄原烷进行比较。在不同浓度和温度下研究了油和水界面（O / W）界面处CSNF的界面性质。采用无柄液滴法研究了CSNF对油湿砂岩表面的润湿性改变效率。在储层条件下进行核心洪水实验。该方法在生产平均直径为100nm的球形和多边形纳米颗粒方面是有效的，并且结晶度增加7％。与粘度的降低相比，CSNF的表面积和温度的增加而增加，随着黄原坦的温度升高，粘度随着粘度的降低而增加。界面张力（IFT）随着CSNF，电解质和温度的浓度而降低。结果表明，CSNF可以在低浓度，高盐度和升高的温度下改变砂岩的润湿性。压降数据显示CSNF在120摄氏度下的稳定性。油库的形成足以将石油回收增加23％。 （c）2019 Elsevier B.v.保留所有权利。

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