Plasma-catalytic Removal of Formaldehyde in Atmospheric Pressure Gas Streams
Formaldehyde is a major indoor air pollutant and it is able to cause serious health disorders in residents. Major conventional techniques in removing formaldehyde from gas streams include absorption, adsorption, catalytic and photo-catalytic oxidation processes. Low efficiency, high energy consumption and harmful byproducts are major problems in these methods. This work combined dielectric barrier discharge (DBD) plasmas with Ag/CeOz catalysts, and achieved lower energy consumption (-90 eV/molecule of HCHO), higher GHVS (16500 h-1), high oxidative conversion into CO2 (86％) and high removal efficiency (99％) to remove formaldehyde in gas streams at atmospheric pressure, when a feed gas mixture of 276 ppm HCHO, 21.0％ O2,1.0％ H2O in N2 was used. Experimental results indicate that the plasma-generated short-lived gas phase radicals, such as O, OH and HO2, play important roles in the catalytic redox circles of Ag/CeO2 to oxidize HCHO and CO to CO2.
Formaldehyde plasma Catalysis
DING Huixian ZHANG Zengfeng
Heilongjiang Institute of Science & Technology,Harbin 150027,PR China
国际会议
11th International Conference on Electrostatic Precipitation(第11届国际电除尘学术会议)
杭州
英文
665-669
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）