Abstract: At atmospheric pressure and ambient temperature, converting CO₂/H₂ into CH₄ under synergism pulse corona plasma with catalyst was studied for the first time. Anew route of CO₂ activation was opened up in the comprehensive utilization of carbon resources. Effect of catalyst loading on conversion of CO₂, the parameters of plasma discharge and the process parameters were studied. Additionally, the mechanism of activation and transformation of CO₂ under discharge plasma was discussed. Experimental results showed that CO₂/H₂ were converted into CH₄, the conversion of CO₂ was increased with increasing catalyst loading. The peak value of pulse voltage, discharge frequency, discharge polarity, the way of gas input and space velocity were important to conversion of CO_2. Under the same conditions, Plasma catalysis are better than conventional catalysis and plasma methods.

Key words: Plasma-catalyst, CO₂ Methanation, Pulse discharge plasma, Ni/ γ-Al₂O₃