大气压DBD甲烷二氧化碳转化方法研究

Study on Methane and Carbon Dioxide Conversion Using DBD at Atmospheric Pressure

在不使用催化剂,吸收剂的环境友好条件下,利用大气压介质阻挡强电离放电加速电子及激励气体分子 方法,将CH4和CO2气体激发、电离和离解成CH3,CH2,CH,H,CO,O,OH等活性粒子,并在非平衡等离子体反 应器内重新组合,生成合成气、气态烃及含氧有机物醇、酸等有价值产物,甲烷的转化率高达60％以上,二氧 化碳或氮气的加入使甲烷的转化率有明显提高,甲烷与二氧化碳反应气的最佳体积比为3／1．当甲烷体积分数为 75％时,可得到H2／CO摩尔比为3的高质量的合成气,收集到的液体产物主要有醇、酸和水等．

CH4 and CO2 can be excited, ionized and dissociated into active particles such as CH3, CH2, CH, H, CO, O and OH et al. by the dielectric barrier strong ionization discharge at atmospheric pressure. These particles can recombine each other in the reactor to form valuable products including syngas, gaseous hydrocarbons and oxo organic compounds without catalyst and absorbent. the conversion rate of CH4 reached up to 60%, and it can be increased evidently in the presence of CO2 and N2. The optimum feed ratio of CH4/CO2 is 3/1. If CH4/CO2 is 75% by volume, the high quality syngas with n(H2)/w(CO)=3 can be obtained by the technique. Main components of liquid products are carbinol, ethanol, acetic acid and water.