Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 397, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.122581
Keywords
NO and SO2 removal in waste flue gas; Ozone; Fertilizers; Ammonium nitrate; Ammonium sulfate
Categories
Funding
- National Strategic Project-Fine particle of the National Research Foundation of Korea(NRF) - Ministry of Science and ICT(MSIT)
- Ministry of Health and Welfare(MOHW) [2017M3D8A1092029]
- Ministry of Environment (ME)
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This study focused on the simultaneous removal of NO and SO2 from an industrial flue gas stream. To evaluate the removal efficiency of NO and SO2 using O-3 and NH3, the consumption of two reactants (O-3 and NH3) in line with the conversion of NO and SO2 was quantified experimentally. In addition, NO and SO2 were converted to valuable fertilizers, NH4NO3 and (NH4)(2)SO4. To identify a principle strategy to enhance the generation of fertilizer, Fourier transform infrared spectroscopy was used to examine the reaction mechanisms for the formation of NH4NO3 and (NH4)(2)SO4. Acceleration of SO2 oxidation could be achieved effectively by adding NO to a gas mixture of SO2, NH3, and O-3. The formation of HNO3 might be enhanced by the simultaneous feeding of NO and SO2. Particle generation was also 10 times higher for NH3/(NO + SO2) than for NH3/NO and for NH3/SO2, which is a prominent feature of this study. Moreover, the introduction of steam had a positive influence on particle generation. This method offers dual applications for NO and SO2 removal from a flue gas stream and direct fertilizer generation.
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