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removal of nitric oxide from simulated flue gas using aqueous persulfate with activation of ferrous ethylenediaminetetraacetate in the rotating packed bed

引用

Frontiers of Chemical Science and Engineering 2023年第4期17卷 460-469页

作者： Da Guo Guisheng Qi Dong Chen Jiabao Niu Youzhi Liu Weizhou Jiao Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China School of Chemistry and Chemical Engineering North University of ChinaTaiyuan 030051China

Nitric oxide being a major gas pollutant has attracted much attention and various technologies have been developed to reduce NO emission to preserve the *** persulfate oxidation technology is a workable and effective choice for wet flue gas denitrification due to its high efficiency and green ***,NO absorption rate is limited and affected by mass transfer limitation of NO and aqueous persulfate in traditional *** this study,a rotating packed bed(RPB)was employed as a gas-liquid absorption device to elevate the no removal efficiency(η_(NO))by aqueous persulfate((NH_(4))_(2)S_(2)O_(8))activated by ferrous ethylenediaminetetraacetate(Fe^(^(2+))-EDTA).The experimental results regarding the NO absorption were obtained by investigating the effect of various operating parameters on the removal efficiency of NO in *** the concentration of(NH_(4))_(2)S_(2)O_(8) and liquid-gas ratio could promoted the oxidation and absorption of NO while theη_(NO) decreased with the increase of the gas flow and NO *** addition,improving the high gravity factor increased theη_(NO) and the total volumetric mass transfer coefficient(K_(G)α )which raise theη_(NO) up to more than 75%under the investigated *** observations proved that the RPB can enhance the gas-liquid mass transfer process in NO *** correlation formula between K_(G)α and the influencing factors was determined by regression calculation,which is used to guide the industrial scale-up application of the system in NO *** presence of O_(2) also had a negative effect on the NO removal process and through electron spin resonance spectrometer detection and product analysis,it was revealed that Fe^(2+)-EDTA activated(NH_(4))2S_(2)O_(8) to produce•SO_(4)^(-),•OH and•O_(2)^(-),played a leading role in the oxidation of NO,to produce NO_(3)^(-)as the final *** obtained results demonstrated a good applicable potential of RPB/PS/Fe^(2+)-EDTA in the

关键词： rotating packed bed Fe2+-EDTA sulfate radical hydroxyl radical no removal efficiency

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