微量气味成分的自由基簇射技术脱除

Elimination of Trace Odorous Contaminants by Corona Radical Shower in a Closed System

研究了密闭体系中微量气味污染物的脱除作用与机理。采用电晕放电自由基簇射技术,实现了人工环境下氧化性自由基的产生;以电子自旋共振技术(ESR)对气态羟基自由基实施了捕集和检测,验证了在羟基自由基的存在下NH3被氧化为N2。通过U-I获得反应能耗和污染物去除效率为:NH3脱除效率为90.6%时,能耗1.0 W。研究表明:自由基簇射技术产生的氧化性自由基可有效去除密闭生存环境中产生的NH3等微量有害气味成分,将在空间站等密闭生存系统内空气净化中有很好的应用前景。

The study was conducted to remove the trace odorous contaminants in a closed system. Oxidative radicals were generated by corona discharge radical shower in an artificial environment. The oxidants, hydroxyl radicals, were trapped and detected by electron spin resonance （ESR） technology. The existence of hydroxyl radicals in corona discharge was identified. The results showed that NH3 was oxidized to N2. By employing U-I curve, the energy consumption in the reactor with reaction product was characterized and the efficiency of contaminant elimination was also calculated ： energy consumption was 1.0 W when NH3 removal efficiency reached 90.6% , however without the generation of ozone. The results indicates that corona radical shower technology can efficiently remove NH3 and other trace pollutants emitted from a closed environment, which could serve as an alternative for air purification in the closed system such as the space station.