PMID: 16509354Mar 3, 2006Paper

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

Environmental Science & Technology
Sanjoy Barman, Ligy Philip

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 TiO2 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 HNO3/HNO2 in the regeneration process. Stoichiometrically, 10% excess ozone was able to affect 100% oxidation of NO to NO2. Presence of SO2 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.

References

Oct 25, 2002·Environmental Pollution·J S DaltonG C Allen
May 31, 2003·Environmental Science & Technology·Ligy Philip, Marc A Deshusses

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Citations

Feb 27, 2010·Environmental Technology·Yi ZhaoYana Feng
Jun 1, 2019·Chemical Society Reviews·Masoud Jahandar LashakiAbdelhamid Sayari
Sep 8, 2020·Environmental Science and Pollution Research International·Nan LiuJi-Hong Zhao
Jan 13, 2021·Environmental Science & Technology·Li-Kun WangBing-Jie Ni
Jun 29, 2010·The Science of the Total Environment·Kinga SkalskaStanislaw Ledakowicz

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