介质阻挡放电等离子体分解CO_2

温室效应导致全球变暖已成为全球性的环境问题之一.采用放电等离子体法转化CO2,不仅可消纳温室气体,缓解全球变暖的巨大影响,还可制备化工原料CO和O2.充分利用了C1(含1个碳原子的化合物分子)资源,对高频同轴式介质阻挡放电等离子体分解纯CO2进行了研究.结果发现:在采用不锈钢光滑内电极,放电间隙为2.0mm,注入功率为180W,气体流量为170mL/min的条件下,CO2转化率可达18.2%,CO和O2产率分别为10.1%和4.7%;增大注入功率,减小气体流量、选择合适的放电间隙和内电极形式,均有利于提高CO2转化率,获得更多的CO和O2.

Decomposition of Carbon Dioxide by Dielectric Barrier Discharge Plasma

The greenhouse effect and induced global warming are both global environmental issues. Plasma decomposition of carbon dioxide can not only reduce the impact of global warming by consuming the greenhouse gas, but also obtain carbon monoxide and oxygen as by-products, which fully utilizes the carbon-1 resource. In this article, the decomposition of carbon dioxide using high-frequency coaxial dielectric barrier discharge plasma was investigated. The experimental results showed that the decomposition efficiency of carbon dioxide and the yields of carbon monoxide and oxygen could reach 18.2%, 10.1% and 4.7%, respectively, when the discharge gap was 2.0 mm, input power was 180 W, gas flow rate was 170 mL/min and the inner electrode was a smooth stainless steel tube. The results indicated that high input power and low gas flow rates with an appropriate discharge gap and inner electrode contributed to the improvement of the decomposition of carbon dioxide, and the production of carbon monoxide and oxygen.