采用刀片式不锈钢电极放电反应器,以Ar气为稀释气,研究了等离子体作用下甲烷转化制C2烃的工艺条件.考察了CH4流量、高频电源输入电压和电极间距等参数对甲烷转化率、C2烃选择性、收率和反应表观能耗的影响.结果表明,增加CH4流量,表观能耗随之降低；当输入电压和电极间距较小时,甲烷转化率随输入电压和电极间距的增大而增大,但输入电压和电极间距过大时,C2烃收率明显下降,积碳严重.在CH4流量14 mL/min、Ar气流量60 mL/min、高频电源输入电压22 V、电流0.44A、电极间距4 mm的优化条件下,甲烷最高转化率为43.1％,C2烃收率、选择性和表观能耗分别为40.1％、93.2％和2.41 MJ/mol.C2烃中不饱和烃的体积分数可达95％以上.
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