By-products NOx control and performance improvement of a packed-bed nonthermal plasma reactor

NOx are main toxic by-products in the effluent gas when decomposing volatil e organic compounds in air by a packed-bed plasma reactor. Several types of materials such as 13X zeolite, BaTiO3 and Pd/Pt catalysts have been select ed to be packed in the reactor, and methane decomposition and NOx by-produc ts in discharged gases are investigated at different range of reaction temp erature and discharge energy density at atmospheric pressure. The ratios of methane decomposition percentage/NOx concentration are used to assess thes e packed bed materials and reaction conditions. The results show that using Pd/gamma-Al2O3 with lower percentage Pd as packed bed, and discharging wit h lower discharge density at higher reaction temperature can reduce NOx out put effectively and greatly improve performance of the reactor.