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DETOX-H2S –
System for Eliminating Airborne Toxic and Corrosive Compounds Generated in
Sewage Treatment Plants |
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Participants:
Contact:
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Figure 4.16
Conversion of H2S as a function of relative humidity, using glass rings and
two polymers, PET and CA, as TiO2 catalyst supports. |
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Funding:
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CAM funded
project, cost shared: 700 k€
Duration:
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Objectives:
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Develop a
photocatalytic treatment system activated by sunlight or UVA lamps that
operates under real process conditions
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develop an
adsorption treatment system that allows retention or treatment of the
gas flows under normal process conditions
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based on the
results of both systems, develop a new coupled photocatalysis-adsorption
system that enhances the activity of each single system. A drastic
reduction in the volume of the compounds used at present to control
these emissions is expected, thus creating a safer environment for plant
workers as well as for the surrounding area.
Achievements in 2006:
A comprehensive
bibliographic study of photocatalysis and adsorption processes related to
gaseous sulfur compounds was performed. Several supports, catalyst
preparation methods and adsorbents for H2S elimination were selected and
characterized. The efficiency of different materials for H2S removal was
evaluated at laboratory scale. SO2 was detected as a by-product of the
photocatalytic treatment. Photocatalyst deactivation by accumulation of
sulfate and the possibility of regeneration with water was studied.
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Background:
A new system is
being developed for the treatment of dangerous toxic substances, such as
H2S, mercaptans, etc., which cause malodorous sewage plant air emissions
that make these installations socially unacceptable. |
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Publications:
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Sánchez B.,
Coronado J.M., Candal R., Portela R., Teje-dor I., Anderson M.A.,
Tompkins D., Lee T. (2006) Prepara-tion of TiO2 Coatings on PET
Monoliths for the Photoca-talytic Elimination of Trichloroethylene in
the Gas Phase, Appl. Catal. B. 66 (3-4), 295-301.
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