Nanocarbons were synthesized from benzene - water - sodium dodecyl sulfate（SDS）and benzene-（water-ethanol）-SDS systems using solution plasma. The stabilized emulsion formed in the benzene-water-SDS and benzene-（water-ethanol）-SDS. The specific surface areas of nanocarbons synthesized from benzene-water-SDS increased with the increase of the SDS concentration, although their variation was not great. By contrast, the surface areas of nanocarbons synthesized from benzene-（water-ethanol）-SDS were altered considerably compared to the variation in benzene-（water-ethanol）-SDS system. The maximum specific surface area was 387 m²/g. The minimum averaged pore size was 13.5 nm when the ratio of ethanol to water was 0.5. That fact suggests that the emulsion size of 50-100 nm influences the meso-structures of the obtained carbon in solution plasma processes.