Comparative Investigation of Catalytic Partial Oxidation of Methane in the Presence of NiO and CuO in DBD Plasma Reactor: Ultimate Products and Energy Consumption

Document Type : Research Article


Department of Chemical engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran, I.R. IRAN


In this study, the effect of changes in plasma generator voltage on the partial oxidation reaction of methane in a DBD plasma reactor and in three states without catalyst, plasma with nickel oxide catalyst, and plasma with copper oxide catalyst was investigated. The results showed that increasing the device voltage from 6 to 10 kV with nickel catalyst increased the molar percentage of methanol from 0.37 to 0.76% and for C₂ + hydrocarbons from 0.55 to 1.8%. Plasma and copper catalyst testing decreased the production of precious hydrocarbons as the voltage increased. Hence, the molar percentage of methanol declined from 0.3 to 0.18, and the molar percentage of C₂ + diminished from 0.82 to 0.23. Calculation of energy consumption when increasing the device voltage showed that the experiments were performed at 6 kV voltage with a higher energy efficiency of 0.17 mmol/ kJ. At this voltage and in the presence of a nickel oxide catalyst,  the selectivity of carbon monoxide was 37% and hydrogen was 58%, which was higher than the other two and the amount of H₂ / CO in the synthesis gas was closer to 2. To sum up, the choice of nickel catalyst in the DBD plasma reactor to produce precious hydrocarbons or synthetic gas with lower energy consumption is better than copper catalyst and non-catalyst plasma.


Main Subjects

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