Features of Hydrogen Sulphide Elimination from Methane under Various Conditions in Barrier Discharge

The process of elimination of hydrogen sulphide from methane in the plasma of barrier discharge in the presence of octane vapour is investigated. The use of octane vapour in the initial mixture with methane and hydrogen sulphide allows us to avoid the formation of deposit on the electrodes of the plasmachemical reactor and to achieve the high level of inhibition of the reactions leading to the formation of polymer-like compounds. The extent of hydrogen sulphide removal reaches 98 %, methane conversion does not exceed 10 %. Power consumption for the removal of hydrogen sulphide is 83 (kW.h)/kg. The major gaseous products of the treatment in the barrier discharge are hydrogen (30 %) and ethane (30 %). Among sulphur-containing products, mainly mono- and dialkyl sulphides were detected. A possible mechanism of the process is proposed. The ways to manage the plasmachemical process are substantiated.