Flue gas desulfurization process utilizing hydrogen peroxide

Details Flue gas desulfurization process utilizing hydrogen peroxide Flue gas desulfurization process utilizing hydrogen peroxide

2011-08-16

2011-08-16

Greene, Jason M (Department: 1776)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

C095S235000, C423S539000

Reexamination Certificate

active

07998446

ABSTRACT:
A flue gas desulfurization process in which a SO2-containing flue gas stream is contacted with a recirculating stream of an aqueous medium containing concentrated sulfuric acid and hydrogen peroxide, to yield a desulfurized flue gas stream and to produce additional sulfuric acid in the aqueous medium. A portion of the recirculating aqueous sulfuric acid stream is diverted for recovery of the additional sulfuric acid as gypsum in a neutralization step, and the process parameters are adjusted so that the heat of reaction generated during the neutralization step is sufficient to evaporate the free water that is present and yield a gypsum product that is substantially dry.

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