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Controlling formaldehyde emissions with boiler ash.

Jennifer Cowan·Malyuba Abu-Daabes·Sujit Banerjee
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Abstract

Fluidized wood ash reduces formaldehyde in air from about 20 to <1 ppmv. Methanol is removed to a much lower extent. The efficiency of formaldehyde reduction increases with increasing moisture content of the ash. Sorption of formaldehyde to ash can be substantially accounted for by partitioning to the water contained in the ash followed by rate-controlling binding to the ash solids. Adsorption occurs at temperatures of up to 165 degrees C; oxidation predominates thereafter. It is proposed that formaldehyde could be stripped from an air stream in a fluidized bed containing ash, which could then be returned to a boiler to incinerate the formaldehyde.

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AdsorptionAir PollutionFixativesFormaldehydeIncinerationOxidation-ReductionTemperatureWoodJournal ArticleResearch Support, U.S. Gov't, Non-P.H.S.

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Jennifer Cowan, Malyuba Abu-Daabes, Sujit Banerjee. 2005-07-01. Controlling formaldehyde emissions with boiler ash.. https://doi.org/10.1021/es0505402

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