Simultaneous removal of SO2 and NO2 using a Mg-Al oxide slurry treatment

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11 Citations (Scopus)


SO2 and NO2 were simultaneously removed from a mixed gas using a Mg-Al oxide slurry treatment. Both adsorption to the oxide material itself and dissolution of the gases in the aqueous slurry contributed to the removal. A comparison was made between removal of the two gases separately and the simultaneous process. The removal of SO2 using both the simultaneous and individual process was similar; however, the removal of NO2 was lower for the simultaneous process. For the individual treatments, SO2 and NO2 were separately dissolved in the Mg-Al oxide slurry to produce SO32-, NO2-, and NO3-, which were subsequently removed by the Mg-Al oxide. However, when the simultaneous process was employed, the dissolved gases were seen to have a significant effect on each other. It was speculated that the production of NO2- was increased by the reduction of NO2 by SO32 On increasing the quantity of the Mg-Al oxide, or on raising the temperature of the system, the removal of SO2 increased, with a concurrent decrease in NO2 removal. The increase in removal of SO32- was speculated to hinder the conversion of NO2 to NO2-, therefore decreasing the removal of the nitrogen species. The results demonstrate that the Mg-Al oxide slurry was highly effective for simultaneously removing NO2 and SO2 from a mixed gas.

Original languageEnglish
Pages (from-to)2889-2893
Number of pages5
Issue number11
Publication statusPublished - 2013 Nov


  • Mg-Al oxide slurry
  • Simultaneous treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis


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