Abstract
SULPHUR and nitrogen oxides emitted by the combustion of fossil fuels in power plants have an important role in acid-rain production1. Most of the flue-gas desulphurization scrubbers installed to date involve wet limestone processes, which are efficient in SO2 control but are incapable of removing nitric oxide. Here we report a new and efficient method for the combined removal of SO2and NOX from flue gas, using aqueous emulsions containing yellow phosphorus and an alkali. The products comprise sulphate, nitrate and phosphate salts which can be used as fertilizer materials. The process described here may also be applied to stationary sources other than power plants, such as smelters, nitric acid plants and municipal incinerators for NOX control.
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Chang, S., Liu, D. Removal of nitrogen and sulphur oxides from waste gas using a phosphorus/alkali emulsion. Nature 343, 151–153 (1990). https://doi.org/10.1038/343151a0
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DOI: https://doi.org/10.1038/343151a0
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