甲烷在氢气助解下的脱氢偶联研究

运用微波等离子体技术 ,研究了甲烷在氢气助解下的等离子体化学反应。在该偶联反应中 ,氢气是一种气体催化剂 ,它的加入有助于甲烷的脱氢偶联转化制备C2 烃。在相同的条件下 ,甲烷的转化率和乙炔的选择性都随着微波输入功率的增加而增大 ,乙烷的选择性则降低。在最佳条件下 ,甲烷的转化率达到 77.5 % ,乙炔的选择性达到 74.1%。对等离子体中的电子密度和电子能量进行了诊断 ,根据实验结果 ,提出了可能的反应机理

Study on coupling reaction of methane dehydrogenation at the aid decomposition of hydrogen

The microwave plasma chemical reactions of CH_4 at the aid decomposition of H_2 were studied by using the microwave plasma technology. Hydrogen was a gas catalyst in the reactions, and it was useful for hydrogen to synthesis of C_2 hydrocarbons by dehydrogenation coupling reactions of methane. At the same conditions, the conversion of methane and selectivity of C_2H_2 increased with microwave input power increasing, and selectivity of C_2H_6 decreased. In the optimal operation, the conversion of methane was up to 77.5%, selectivity of C_2H_2 was 74.1%. Electron energy and density in the plasma of CH_4 and H_2 were diagnosed by a floating double electrostatic probes. According to result of experiments, mechanisms of methane dehydrogenation coupling reaction at the aid decomposition of hydrogen were proposed.