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Gas-phase advanced oxidation as an integrated air pollution control technique

1 Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
2 Infuser ApS, Ole Maaløes vej 5, DK-2200 Copenhagen N, Denmark
3 Rīga Stradiņš University, 16 Dzirciema Street, Rīga, LV-1007, Latvia
4 Airlabs, Ole Maaløes vej 3, DK-2200 Copenhagen N, Denmark

Special Issue: Advanced Technologies for Air Pollution Control

Gas-phase advanced oxidation (GPAO) is an emerging air cleaning technology based on the natural self-cleaning processes that occur in the Earth’s atmosphere. The technology uses ozone, UV-C lamps and water vapor to generate gas-phase hydroxyl radicals that initiate oxidation of a wide range of pollutants. In this study four types of GPAO systems are presented: a laboratory scale prototype, a shipping container prototype, a modular prototype, and commercial scale GPAO installations. The GPAO systems treat volatile organic compounds, reduced sulfur compounds, amines, ozone, nitrogen oxides, particles and odor. While the method covers a wide range of pollutants, effective treatment becomes difficult when temperature is outside the range of 0 to 80 °C, for anoxic gas streams and for pollution loads exceeding ca. 1000 ppm. Air residence time in the system and the rate of reaction of a given pollutant with hydroxyl radicals determine the removal efficiency of GPAO. For gas phase compounds and odors including VOCs (e.g. C6H6 and C3H8) and reduced sulfur compounds (e.g. H2S and CH3SH), removal efficiencies exceed 80%. The method is energy efficient relative to many established technologies and is applicable to pollutants emitted from diverse sources including food processing, foundries, water treatment, biofuel generation, and petrochemical industries.
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Copyright Info: © 2016, Matthew S. Johnson, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0))

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