▎ 摘　　要

This paper describes the results of an experimental study on the usage of high-frequency, high-voltage, low direct current spark discharge plasma to examine the catalytic role of chlorine (Cl-2) gas on the selective and rapid conversion of light hydrocarbons in the natural gas stream. Our results indicate that the cold DC-spark discharge method in the presence of small amount of chlorine gas is a useful method for decomposition of methane into gaseous constituents and carbon at relatively low power consumption (10 W). Presence of Cl-2 boosts the conversion rate of methane (the main constituent of natural gas) to C-2 hydrocarbons, as well as formation of nano-graphene, and apparently, molecular hydrogen. Our results indicate that conversion of methane increases by a factor of similar to 3 in the presence of 6-8 % of chlorine gas. This method is adopted as an efficient and selective routine for the formation of nano-carbons such as graphene using natural gas along with a trace amount of Cl-2 in an inert atmosphere such as argon bath gas.