Saeedi Dehaghani Amir Hossein, Gharibshahi Reza, Mohammadi Mohammad
Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran.
Sci Rep. 2023 Oct 30;13(1):18652. doi: 10.1038/s41598-023-46030-1.
This study investigated the effect of silane-based silica (SiO) Janus nanoparticles (JNPs) on stabilizing the foam generated by different types of gases. Two types of SiO JNPs were synthesized through surface modification using HMDS and APTS silane compounds. Static analyses were conducted to examine the impact of different concentrations of the synthesized nanoparticles in various atmospheres (air, CO, and CH) on surface tension, foamability, and foam stability. The results indicated that the synthesized SiO JNPs and bare SiO nanoparticles exhibited nearly the same ability to reduce surface tension at ambient temperature and pressure. Both of these nanoparticles reduced the surface tension from 71 to 58-59 mN m at 15,000 ppm and 25 °C. While bare SiO nanoparticles exhibited no foamability, the synthesis of SiO JNPs significantly enhanced their ability to generate and stabilize gas foam. The foamability of HMDS-SiO JNPs started at a higher concentration than APTS-SiO JNPs (6000 ppm compared to 4000 ppm, respectively). The type of gas atmosphere played a crucial role in the efficiency of the synthesized JNPs. In a CH medium, the foamability of synthesized JNPs was superior to that in air and CO. At a concentration of 1500 ppm in a CH medium, HMDS-SiO and APTS-SiO JNPs could stabilize the generated foam for 36 and 12 min, respectively. Due to the very low dissolution of CO gas in water at ambient pressure, the potential of synthesized JNPs decreased in this medium. Finally, it was found that HMDS-SiO JNPs exhibited better foamability and foam stability in all gas mediums compared to APTS-SiO JNPs for use in oil reservoirs. Also, the optimal performance of these JNPs was observed at a concentration of 15,000 ppm in a methane gas medium.
本研究调查了硅烷基二氧化硅（SiO）Janus纳米颗粒（JNPs）对稳定不同类型气体产生的泡沫的影响。通过使用六甲基二硅氮烷（HMDS）和3-氨丙基三乙氧基硅烷（APTS）硅烷化合物进行表面改性，合成了两种类型的SiO JNPs。进行了静态分析，以研究不同浓度的合成纳米颗粒在各种气氛（空气、CO和CH）中对表面张力、发泡性和泡沫稳定性的影响。结果表明，合成的SiO JNPs和裸露的SiO纳米颗粒在常温常压下降低表面张力的能力几乎相同。在15000 ppm和25°C时，这两种纳米颗粒均将表面张力从71降低至58 - 59 mN/m。虽然裸露的SiO纳米颗粒没有发泡性，但SiO JNPs的合成显著增强了它们产生和稳定气体泡沫的能力。HMDS-SiO JNPs的发泡性起始浓度高于APTS-SiO JNPs（分别为6000 ppm和4000 ppm）。气体气氛类型对合成的JNPs的效率起着关键作用。在CH介质中，合成的JNPs的发泡性优于在空气和CO中的发泡性。在CH介质中浓度为1500 ppm时，HMDS-SiO和APTS-SiO JNPs分别可使产生的泡沫稳定36分钟和12分钟。由于在常压下CO气体在水中的溶解度非常低，合成的JNPs在这种介质中的潜力降低。最后发现，在油藏应用中，与APTS-SiO JNPs相比，HMDS-SiO JNPs在所有气体介质中均表现出更好的发泡性和泡沫稳定性。此外，在甲烷气体介质中浓度为15000 ppm时观察到这些JNPs的最佳性能。
