Lignin Nanoparticles as Highly Efficient, Recyclable Emulsifiers for Enhanced Oil Recovery

Emulsification is one of the important processes in chemical flooding to mobilize residual oil wells following secondary recovery. Oil displacement efficiency enhanced and volumetric sweep increased by engineering interactions supporting chemicals used with geological formations present wells. Polymers surfactants are often applied recovery (EOR) as emulsification displacement. However, polymers limited poor temperature salt tolerance, while have a high cost. In this contribution, we report on use lignin nanoparticles (LNPs) Pickering emulsifiers obtained from enzymatic hydrolysis powders apply EOR. The interfacial activity LNPs prepared way greatly improved, which substantially promotes its ability. We show that kerosene emulsified different concentrations can form stable emulsions, emulsions be stored for up 6 months. addition, due pH responsive character lignin, rapid oil–water separation achieved alkali demulsification. This enables reuse suspension under control, provides new platform application green low-cost flooding, employing