International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Simultaneous Removal of NO and SO2 from Simulated Flue gas using Fe (II) EDTA coupled with Catalytic Regeneration

Author Affiliations

  • 1 Department of Chemistry, A. I. J. H. M. College, Rohtak - 124001 (Haryana), INDIA
  • 2 Department of Chemistry, D. C. R. Univ. of Sci. and Technol., Sonipat: 131001 (Haryana), INDIA

Int. Res. J. Environment Sci., Volume 4, Issue (7), Pages 63-69, July,22 (2015)


Experiments were performed in a packed column to investigate the absorption of NO and SO into Fe (II) EDTA complex. The effect of various operating variables such as amount of activated carbon, pH, liquid flow rate, temperature, Ocontent, and sulfitebisulfiteon the absorption of NO and SO by Fe (II) EDTA solution was examined. Fe (II) EDTA was regenerated by catalytic reduction of Fe (III) EDTA by sulfiteionsin the presence of activated carbon. SO2 is almost 100% absorbed in the scrubbing solution during all the experiments. The rate of NO absorption increased with the amount of activated carbon. Absorption of NO increased with pH and reached to the maximum value at a pH of ~7.5 and decreased thereafter. The rate of NO absorption increased with the liquid flow rate and decreased with increasing O2 content. However, NO absorption decreased with theincreasing temperature in the absence of activated carbon and increased in the presence of activated carbon. Further, the rate of NO Absorption improved with the sulfitebisulfite concentration.


  1. Baveja K., Subba Rao D. and Sarkar M.K., Kinetics of absorption of nitric oxide in hydrogen peroxide solutions, J. Chem. Eng. Jpn.,12, 322-325 (1979)
  2. Littlejohn D. and Chang S., Removal of NO and SOfrom flue gas by per acid solution, J. Ind. Eng. Chem. Res., 29, 420-1424 (1990)
  3. Perlmutter H., Ao H. and Shaw H., Absorption of NO promoted by strong oxidizing agent: 1. organic tertiary hydro peroxides in n-hexadecane, J. Environ. Sci. Technol., 27128-133 (1993)
  4. Sada E., Kumazawa H., Kudo I. and Kondo T., Absorption of NO in aqueous mixed solutions of NaCIO2 and NaOH, Chem. Eng. Sci., 33, 315-318 (1978)
  5. Sada E., Kumazawa H., Kudo I. and Kondo T., Absorption of lean NOx in aqueous solutions of NaClOand NaOH, Ind. Eng. Chem. Proc. Des. Dev18, 275-278 (1979)
  6. Brogen C., Karlsson H.T. and Bjerle I., Absorption of NO in an aqueous solution of NaClO, J. Chem. Eng. Technol., 21, 61-70 (1998)
  7. Chu H., Chien T.W. and Twu B.W., The absorption kinetics of NO in NaClO2 /NaOH solutions, J. Hazard. Mater., B84, 241-252 (2001)
  8. Lee H.K., Deshwal B.R. and Yoo K.S., Simultaneous removal of SO and NO by sodium chlorite solution in wetted-wall column, Korean J. Chem. Eng., 22-2, 208-213 (2005)
  9. Brogen C., Karlsson H.T. and Bjerle I., Absorption of NO in an alkaline solution of KMnOJ. Chem. Eng. Technol., 20, 396-402 (1997)
  10. Chu H., Li S.Y. and Chien T.W., The absorption kinetics of NO from flue gas in a stirred tank reactor with KMnO/NaOH solutions, J. Environ. Sci. Health, A33, 801-827 (1998)
  11. Int. Res. J. Environment Sci.International Science Congress Association 6911.Jin D.S., Deshwal B.R., Park Y.S. and Lee H.K., Simultaneous removal of SO and NO by wet scrubbing using aqueous chlorine dioxide solution, J. Hazard. Mater., B135, 412-417 (2006)
  12. Deshwal B.R., Jin D.S., Lee S.H., Moon S.H., Jung J.H. and Lee H.K., Removal of NO from flue has by aqueous chlorine-dioxide scrubbing solution in a lab-scale bubbling reactor, J. Hazard. Mater., 150, 649-655 (2008)
  13. Warshaw A., Removal of nitrogen oxides from a gas stream, US Patent, 3565575, (1971)
  14. Kustin K., Taub I.A. and Weinstock E., A kinetic study of the formation of the ferrous-nitric oxide complex, Inog. Chem., 1079-1082 (1966)
  15. Teramoto M., Hiramine S., Shimada Y., Sugimoto Y. and Teranishi H., Absorption of dilute nitric monoxide in aqueous solutions of Fe(II)EDTA and mixed solutions of Fe(II)EDTA and NaSO, J. Chem. Eng. Jpn., 11, 450-457 (1978)
  16. Khan N.E. and Adewuyi Y.G., Absorption and oxidation of nitric oxide (NO) by aqueous solutions of sodium persulfate in a bubble column reactor, Ind. Eng. Chem. Res., 49-18, 8749-8760 (2010)
  17. Takeuchi H., Ando M. and Kizawa N., Absorption of nitrogen oxides in aqueous sodium sulfite and bisulfate solutions, Ind. Eng. Chem. Proc. Des. Dev., 16, 303-308 (1977)
  18. Guo R., Pan W., Zhang X., Ren J., Jin Q., Xu H. and Wu J., Removal of NO by using Fenton reagent solution in a lab-scale bubbling reactor, Fuel, 90-11, 3295-3298 (2011)
  19. Chang S.G., Littlejohn D. and Liu D. K., Use of Ferrous Chelates of SH-Containing Amino Acid and Peptides for the Removal of NO and SO from Flue Gas, Ind. Eng. Chem. Res., 27, 2156-2161 (1988)
  20. Pham E.K. and Chang S.G. Removal of NO from Flue Gases by Absorption to an Fe(II) Thiochelate Complex and Subsequent Reduction to Ammonia, Nature, 369, 139-141 (1994)
  21. Sada E. and Kumazawa H., Individual and Simultaneous Absorption of Dilute NO and SO in Aqueous Slurries of MgSO with Fe(II) EDTA, Ind. Eng. Chem. Pro. Des. Dev., 19, 377-382 (1980)
  22. Yih S.M. and Lii C.W., Simultaneous absorption of nitric oxide and sulphur dioxide in Fe (II) EDTA solutions in a packed absorber-stripper unit, J. Chem. Eng. 42, 145-152 (1989)
  23. Gambardella F., Winkelman J.G.M. and Heeres H.J., Experimental and modeling studies on the simultaneous absorption of NO and O in aqueous iron chelate solutions, Chem. Eng. Sci.61, 6880-6891 (2006)
  24. Wang L., Zhao W.R. and Wu Z.B.,Simultaneous absorption of NO and SO by Fe (II) EDTA combined with NaSO solution, J. Chem. Eng., 132, 227-232 (2007)
  25. Kurimura Y., Ochiai R. and Matsuura N., Oxygen Oxidation of Ferrous Ions Induced by Chelation, Bull. Chem. Soc. Jpn., 41, 2234-2239 (1968)
  26. Zang V. and Eldik R.V., Kinetics and mechanisms of the autoxidation of iron (II) induced through chelation by ethylenediaminetetraacetate and related ligands, Inorg. Chem., 29, 1705-1711 (1990)
  27. Wubs H.J. and Beenackers A.A.C.M., Kinetics of the oxidation of ferrous chelates of EDTA and HEDTA in aqueous solution, Ind. Eng. Chem. Res., 32, 2580-2594 (1993)
  28. Teramoto M. and Hiramimne S.I., Absorption of dilute nitric monoxide in aqueous solutions of Fe (II)-EDTA and mixed solution of Fe (II)-EDTA and NaSO, J. Chem. Eng., 11, 450-457 (1978)
  29. Wu Z.B., Wang L. and Zhao W.R., Kinetic study on regeneration of Fe (II) EDTA in the wet process of NO removal, J. Chem. Eng., 140, 130-135 (2008)
  30. Wang L., Zhao W. and Wu Z., Simultaneous absorption of NO and SO by Fe (II) EDTA combined with NaSOsolution, Chem. Eng. J., 132(1–3) 227–232 (2007)
  31. Huss A. and Eckert C.A., Solubility of sulphur dioxide in aqueous electrolyte solutions at higher ionic strengths - chloride and bromide containing systems, J. Phys. Chem., 81-24, 2268-2270 (1977)
  32. Dean J.A., Lange’s Handbook of Chemistry, 15th ed., McGraw-Hill, New York, (1999)