Removal of NOx using Electron Beam Process with NaOH Spraying
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초록
Nitrogen oxides (NOx; NO and NO2) are major air pollutants and can cause harmful effects on the humanbody. Electron Beam Flue Gas Treatment (EBFGT) is a technology that generates electrons with an energyof 0.5e1 MeV using electron accelerators and effectively processes exhaust gases. In this study, NOx wasremoved using an electron beam accelerator with spraying additives (NaOH and NH4OH). NO and NO2were 100% and more than 94% removed, respectively, at an electron beam absorbed dose of 20 kGy andan additive concentration of 0.02 M (mol/L). In most cases, NOx was removed better with lower initialNOx concentrations and higher electron beam absorbed doses. As the irradiation strength (mA) of theelectron beam increases, the probability of electron impact on the material accordingly rises, which maylead to increase removal efficiency. The results of the present study show that the continuous electronbeam process using additives achieved more effective removal efficiency than either individual process(wet-scrubbing or EB irradiation only).
Abstract
Nitrogen oxides (NOx; NO and NO2) are major air pollutants and can cause harmful effects on the humanbody. Electron Beam Flue Gas Treatment (EBFGT) is a technology that generates electrons with an energyof 0.5e1 MeV using electron accelerators and effectively processes exhaust gases. In this study, NOx wasremoved using an electron beam accelerator with spraying additives (NaOH and NH4OH). NO and NO2were 100% and more than 94% removed, respectively, at an electron beam absorbed dose of 20 kGy andan additive concentration of 0.02 M (mol/L). In most cases, NOx was removed better with lower initialNOx concentrations and higher electron beam absorbed doses. As the irradiation strength (mA) of theelectron beam increases, the probability of electron impact on the material accordingly rises, which maylead to increase removal efficiency. The results of the present study show that the continuous electronbeam process using additives achieved more effective removal efficiency than either individual process(wet-scrubbing or EB irradiation only).
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