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Title: Integrated system for the treatment of oxides of nitrogen from flue gases

Abstract

A novel and effective system was developed for the complete treatment of NOx from flue gases. The system consisted of photocatalytic or ozone oxidation of NOx, followed by scrubbing and biological denitrification. Maximum photocatalytic oxidation of NOx was achieved while using powdered TiO{sub 2} at a catalytic loading rate of 10 g/h, relative humidity of 50%, and a space time of 10 s. The used catalyst was regenerated and reused. A total of 72% of oxidized NO was recovered as HNO{sub 3}/HNO{sub 2} in the regeneration process. Stoichiometrically, 10% excess ozone was able to affect 100% oxidation of NO to NO{sub 2}. Presence of SO{sub 2} adversely influenced the oxidation of NO by ozone. The scrubbing of NO was effective with distilled water. Heterotrophic denitrifiers were able to denitrify the leachate with an efficiency of 90%, using sewage (COD 450 mg/L) as electron donor. The new integrated treatment system seems to be a promising alternative for complete treatment of NOx from flue gases. 29 refs., 7 figs., 2 tabs.

Authors:
;  [1]
  1. Indian Institute of Technology, Madras (India). Department of Civil Engineering
Publication Date:
OSTI Identifier:
20712317
Resource Type:
Journal Article
Resource Relation:
Journal Name: Environmental Science and Technology; Journal Volume: 40; Journal Issue: 3; Other Information: ligy@iitm.ac.in
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 20 FOSSIL-FUELED POWER PLANTS; FLUE GAS; NITROGEN OXIDES; DENITRIFICATION; TITANIUM OXIDES; REGENERATION; CATALYSTS; OZONE; OXIDATION; SCRUBBING; CATALYSIS; PHOTOCHEMISTRY; BENCH-SCALE EXPERIMENTS; AIR POLLUTION CONTROL; KINETICS; LEACHATES; ABSORPTION; PHOTOCHEMICAL REACTIONS

Citation Formats

Sanjoy Barman, and Ligy Philip. Integrated system for the treatment of oxides of nitrogen from flue gases. United States: N. p., 2006. Web. doi:10.1021/es0515102.
Sanjoy Barman, & Ligy Philip. Integrated system for the treatment of oxides of nitrogen from flue gases. United States. doi:10.1021/es0515102.
Sanjoy Barman, and Ligy Philip. Wed . "Integrated system for the treatment of oxides of nitrogen from flue gases". United States. doi:10.1021/es0515102.
@article{osti_20712317,
title = {Integrated system for the treatment of oxides of nitrogen from flue gases},
author = {Sanjoy Barman and Ligy Philip},
abstractNote = {A novel and effective system was developed for the complete treatment of NOx from flue gases. The system consisted of photocatalytic or ozone oxidation of NOx, followed by scrubbing and biological denitrification. Maximum photocatalytic oxidation of NOx was achieved while using powdered TiO{sub 2} at a catalytic loading rate of 10 g/h, relative humidity of 50%, and a space time of 10 s. The used catalyst was regenerated and reused. A total of 72% of oxidized NO was recovered as HNO{sub 3}/HNO{sub 2} in the regeneration process. Stoichiometrically, 10% excess ozone was able to affect 100% oxidation of NO to NO{sub 2}. Presence of SO{sub 2} adversely influenced the oxidation of NO by ozone. The scrubbing of NO was effective with distilled water. Heterotrophic denitrifiers were able to denitrify the leachate with an efficiency of 90%, using sewage (COD 450 mg/L) as electron donor. The new integrated treatment system seems to be a promising alternative for complete treatment of NOx from flue gases. 29 refs., 7 figs., 2 tabs.},
doi = {10.1021/es0515102},
journal = {Environmental Science and Technology},
number = 3,
volume = 40,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2006},
month = {Wed Feb 01 00:00:00 EST 2006}
}