Sulfur dioxide oxidation activated carbon performances

In these studies, the nitrogen was introduced in the already activated carbons. Another way to prepare such active carbons is to start from coals enriched in nitrogen before the step of pyrolysis or activation [36,37], Two coals were selected a Polish subbituminous coal, preoxidized with performic acid, and a Russian lignite. Ammonia and its derivatives (ammonium carbonate, hydrazine, hydroxylamine, and urea) were applied as N-reagents [36,37], The N-rich-acti-vated carbons showed good oxidative removal activity for traces of hydrogen sulfide and for its oxidized by-products (elemental sulfur and sulfur dioxide) [36],... 

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