Novel Process for Simultaneous Removal of NOx and SO2 from Simulated Flue Gas by Using a Sustainable Ag(I)/Ag(II) Redox Mediator
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Novel Process for Simultaneous Removal of NOx and SO2 from
Simulated Flue Gas by Using a Sustainable Ag(I)/Ag(II) Redox
Mediator
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| Creator |
Raju, T.
Chung, S.J. Moon, I.S. |
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| Subject |
Electroorganic
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| Description |
The objective of this work is to develop a sustainable process
for simultaneous removal of waste gases such as NO, NO2,
and SO2 by an electrochemically generated Ag(I)/Ag(II) redox
mediator system. High removal efficiency was achieved for NO
and SO2 by the wet scrubbing method at room temperature
and atmospheric pressure. This removal is achieved through
oxidation and absorption by contacting the gaseous stream with
redox mediator ions that offer specific or selective solubility
for the solute gases to be recovered in a wet scrubber. The
process parameters such as gas velocity, liquid velocity, Ag(I)
concentration, and HNO3 concentration were investigated to
explore the possibility of complete removal of waste gases. The
Ag(I)/Ag(II)-based mediated electrochemical oxidation
process proved to be quite effective for simultaneous removal
of NO, NOx, and SO2 from the simulated flue gas mixtures
containing NO and SO2 over a wide concentration range of
100-400 ppm. Studies were carried out with individual
gas components for the mixture, and the effect of input NO
and input SO2 concentrations on the NOx and SO2 removal
efficiencies at 20 °C was examined. Complete oxidation of NO
to NO2 with 100% NO removal efficiency and 92% NOx
removal efficiency was achieved along with 100% SO2 removal
efficiency, highlighting a potentially far greater efficiency of
the Ag(I)/Ag(II)-based system in functionality and selectivity.
Active research work in this direction is anticipated in the near
future.
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| Publisher |
American Chemical Society
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| Date |
2008
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/112/1/044-2008.pdf
Raju, T. and Chung, S.J. and Moon, I.S. (2008) Novel Process for Simultaneous Removal of NOx and SO2 from Simulated Flue Gas by Using a Sustainable Ag(I)/Ag(II) Redox Mediator. Environ. Sci. Technol., 42 (19). pp. 7464-7469. |
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| Relation |
http://cecri.csircentral.net/112/
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