等离子体-催化剂耦合作用下CO2的甲烷化研究

常温常压下,利用脉冲电晕等离子体与Ni/γ-Al₂O₃催化剂协同作用CO₂加氢转化生成甲烷,考察了催化剂担载量、放电参数、工艺参数等对反应的影响,并探讨了其反应机理.结果表明,在等离子体与催化剂协同作用下,CO₂加氢生成CH₄,CO₂转化率在催化剂一定担载量范围内随担载量的增加而增加;脉冲电压峰值、重复频率、进气方式、空速等对反应有重要影响;相同条件下,等离子体-催化法优于化学催化法.

Studies on Methanation of CO2 Under Synergism Plasma with Catalyst

At atmospheric pressure and ambient temperature, converting CO2/H2 into CH4 under synergism pulse corona plasma with catalyst was studied for the first time. A new 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 CO2. Under the same conditions, Plasma-catalysis are better than conventional catalysis and plasma methods.