This paper discusses the dispersion behaviors in an agitated ternary system of CO 2 and a nickel electroplating solution with a novel anionic surfactant F(CF(CF 3 )CF 2 O) 4 CF(CF 3 )COO - NH 4 + , as functions of pressure and CO 2 phase volume fraction. The CO 2 volume fraction in the emulsion system strongly influences the type of emulsion. The inversion from CO 2 -in-water (C/W) to water-in-CO 2 (W/C) emulsion depends on pressure, which in turn depends on the density. On the basis of the observed dispersion behaviors, the application of the C/W and W/C emulsions in electroplating has been examined. The formation of a C/W emulsion with a continuous aqueous phase proved to be essential for the electroplating reaction. The W/C emulsions, on the other hand, were only poorly conducive to the electroplating reaction.