Nano-sized rare earth metal oxide particles are prepared from aqueous
reverse micelles. The engineered nanoparticles have large surface area to
volume ratios, and uniformly incorporate a surfactant in each particle,
so that when applied to the inner surface of a pipeline or sprayed onto a
fluid stream in a pipeline, the particles reduce the roughness of the
inside surface of pipe being used to transport fluid. The application of
a nanolayer of this novel nanoceria mixture causes a significant
reduction in pressure drops, friction, and better recovery and yield of
fluid flowing through a pipeline.