反应器特征参数对介质阻挡放电去除NO的影响

Influence of discharge reactor design on the NO removal rate with dielectric barrier discharges

建立了一套高压电源系统,设计了同轴圆柱筒介质阻挡放电管反应器。研究了采用介质阻挡放电冷等离子体去除NO时,介质层厚度、介电常数、中心电极与介质层管尺寸对NO去除率的影响。结果表明:介质层厚度的增加将降低NO的去除率;采用介电常数较大的介质作为阻挡层材料,有助于提高NO的去除率;中心电极直径和介质层管内径变化对NO的去除率有显著的非单调的影响,对于中心电极直径和介质层管内径应存在最佳尺寸使得NO的去除率达到最高。

A high voltage power system and a coaxial cylinder-tube dielectric barrier discharge reactor were designed to study the influence of the discharge reactor design on the NO removal by the discharge of a non-thermal plasma. The investigated discharge reactor design parameters included the thickness and dielectric constant of the dielectric layer, the central electrode diameter, and the internal diameter of the dielectric barrier tube. The experimental results show that the NO removal rate decreases with increasing dielectric layer thickness but increases with increasing dielectric constant of the dielectric material. The size of the central electrode and the dielectric tube internal diameter also influence the NO removal rate. The central electrode diameter and the dielectric tube internal diameter should be optimized to maximize the NO removal rate.