催化剂粒径对DBD反应器性能影响的研究

Effect of Catalyst Particle Diameter on Performances of DBD Reactor

为研究DBD低温等离子体协同催化反应器中催化剂颗粒直径对放电功率和NOx脱除率影响规律,分别将五种不同颗粒直径的催化剂装入相同条件的反应器中,通过变压器改变交流电源输入电压,用功率表测定不同电压条件下的输入功率,用数字示波器测试放电电压以及Lissajous图像并计算放电功率,用气体在线检测装置测试反应器进出口浓度计算NOx脱除率。实验发现随催化剂颗粒直径增加放电电能和NOx脱除率先增大再减小,有最大峰值;随着输入电压增加催化剂颗粒直径对放电电能和NOx脱除率的影响进一步增大。在本实验研究中催化剂最佳颗粒直径在4mm左右,当输入电压为40 kV时,最大有效放电能量和NOx脱除效率分别为29.3W和76.67%。该结论可为DBD协同催化反应过程中选择适宜催化剂颗粒直径提供理论依据。

In order to study the effect of catalyst particle diameter on the discharge power and NOxremoval rate in the reactor of non - thermal plasma DBD with catalytic, five different catalyst particle diameters were filled into the same reactor conditions, respectively . Used the transformer to change the AC power input voltage , measured input power of different voltage by power meter, a digital oscilloscope was used to test discharge voltage and Lissajous image and calculate discharge power, gas online detection device to test the import and export content.ration of the reactor and calculated NOx removal rate. The experiment shows the discharge power and the NOx removal ratio increases and then decreases with the diameter increasing. The catalyst size has a maximum peak value. With the input voltage increasing the effect of particle diameter on the discharge power and the NOx removal ratio increase more. The results show the option diameter of catalyst is 4mm in this experiment, when the input Voltage is 40 kV, the maximum value of the discharge power and the NOx removal ratio is 29.3 W and 76.67%, respectively. The study can provide a theoretical basis for choosing the appropriate diameter of catalyst in the DBD assisted catalytic reactor.