Formaldehyde removal from gas streams by means of NaNO2 dielectric barrier discharge plasma.
Destruction of formaldehyde by means of NaNO2 ferro-electric packed bed dielectric barrier discharge plasma in a coaxial cylindrical reactor was carried out at atmospheric pressure and room temperature. The difference among four kinds of NaNO2 ferro-electric reactors was compared in terms of specific energy density (SED), energy yield (EY), and HCHO decomposition. In addition, by-products during the decomposition of HCHO and destruction mechanism were also investigated. The removal efficiency of HCHO increased by means of NaNO2 DBD plasma significantly and enhanced with increasing SED distinctly. More amount of NaNO2 contributed to higher HCHO removal efficiency in the reactors. Reactor C had the highest HCHO removal efficiency among the reactors. As an important by-product, ozone concentration increased with higher SED. The possible main products in the outlet effluent were CO, CO(2) and H(2)O.
Liang
Wen-Jun
WJ
College of Environmental & Energy Engineering, Beijing University of Technology, No. 100 Ping Le Yuan, Chao Yang District, Beijing 100124, PR China. liangwenj1978@hotmail.com
Li
Jian
J
Li
Jing-Xin
JX
Zhu
Tao
T
Jin
Yu-Quan
YQ
D000393:Air Pollutants / Q000032:analysis / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry; D002384:Catalysis; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D004867:Equipment Design; D005557:Formaldehyde / Q000737:chemistry*; D005740:Gases; D007501:Iron / Q000737:chemistry; D009566:Nitrates / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry; D011312:Pressure; D013053:Spectrophotometry / Q000379:methods; D013696:Temperature; D014867:Water / Q000737:chemistry
D000393:Air Pollutants; D005740:Gases; D009566:Nitrates; D014867:Water; D002245:Carbon Dioxide; D005557:Formaldehyde; D010126:Ozone; C031618:sodium nitrate; D007501:Iron