Simultaneous removal of SO{sub 2}, NOx, and Hg from coal flue gas using a NaClO{sub 2}-enhanced wet scrubber
- US EPA, Research Triangle Park, NC (United States). Office for Research & Development
A bench-scale study was conducted on the simultaneous removal Of SO{sub 2}, NOx, and mercury (both Hg{sup 0} and Hg{sup 2+}) from a simulated coal flue gas using a wet calcium carbonate scrubber. The multipollutant capacity of the scrubber was enhanced with the addition of the oxidizing salt, sodium chlorite. The results showed a maximum scrubbing of 100% for SO{sub 2} and Hg species and near complete NO oxidation with about 60% scrubbing of the resulting NOx species. The chlorite additive was less effective as an oxidant in the absence of SO{sub 2} and NO in the flue gas. Oxidation of NO and mercury were only about 50% and 80%, respectively, in the case of no SO{sub 2} in the simulated flue gas. The mercury oxidation was similarly affected by the absence of NO in the flue gas.
- OSTI ID:
- 21095809
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 47, Issue 16; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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