脉冲电晕环境中13X分子筛对NO分解作用的研究

在常温、常压下，利用脉冲电晕放电产生冷等离子体，使一氧化氮发生分解，直接生成氮气和氧气，用四极杆质谱仪在线测量反应过程中反应物和生成物的变化。在自行研制的实验台上，考察了13X分子筛在不同的脉冲电晕放电条件下，表现出来的不同特性及其对反应转化率的影响。在30 ℃～430 ℃、流量375 mL/min～1 333 mL/min，分析了该反应过程中13X分子筛对转化率的促进作用。在同一脉冲放电条件下，控制13X分子筛的温度为200 ℃，转化率从30 ℃时的1.2%上升到19.7%；转化率最高可以达到35.9%。并对反应过程中13X分子筛的吸附特性做了初步探讨。

Role of 13X in NO decomposition in pulsed corona plasma

The decomposition of NO was studied by using pulsed discharge corona plasma in nitrogen. The work focused on pulsed discharge corona plasma technique for NO decomposition and the effect of 13X pellets on the decomposition process. A quadrupole mass spectrometer was employed for online analysis of the reactants and products of NO plasma decomposition reaction. Experiments were conducted in a cylindrical corona reactor energized by repetitive high voltage pulses, which is a type of pin-plate reactor. All the experiments were operated under atmospheric pressure at temperature between 30oC~430oC. The gas flow rate was from 375 mL/min to 1333mL/min. When the reactor was filled with 13X pellets, the improvement of 13X on NO decomposition was studied and discussed. The effects of various parameters such as pulsed voltage magnitude, pulsed frequency, temperature of the 13X pellets, were discussed either. When the pulsed discharge condition is parallel and the temperature of 13X pellets is controlled at 200oC, the NO removal efficiency is 19.7%, much higher than 1.2% at 30oC. The highest removal efficiency can reach 35.9%.