Activation of flue gas nitrogen oxides by transition metal complexes

Conference · Thu Jan 01 04:00:00 EST 1987 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5999658

Miller, M E; Finseth, D H; Pennline, H W

Sulfur and nitrogen oxides are major flue gas pollutants released by coal-fired electric power plants. In the atmosphere these oxides are converted to sulfuric and nitric acids, which contribute to the acid rain problem. Most of the nitrogen oxides (90%-95%) present in coal-derived flue gas exist as the relatively inert and water-insoluble nitric oxide (NO), thus presenting a difficult removal problem. A practical strategy for nitrogen oxides removal might utilize a solid support that has been impregnated with an active transition metal complex. Some supported transition metals are expected to remove NO/sub x/ by sorption, with regeneration of the sorbent being a necessary property. Others catalyze NO oxidation to the more soluble NO/sub 2/ and N/sub 2/O/sub 5/, which has been demonstrated for certain transition metal species. These activated nitrogen oxides can be more efficiently removed along with SO/sub 2/ in conventional scrubbing or spray-drying processes, in which an aqueous slurry of sorbent, such as hydrated lime, is injected into the hot flue gas. We present here preliminary studies intended to establish basic homogeneous chemistry of transition metal complexes with nitrogen oxides. The transition metals considered in this work are volatile carbonyl complexes. This work is the first step in the development of supported metal species for enhanced nitrogen oxides removal.

• Research Organization: Department of Energy, Pittsburgh, PA (USA)
• OSTI ID: 5999658
• Report Number(s): CONF-8708275-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 32:4
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
CARBONYLS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
DATA
EXPERIMENTAL DATA
FLUE GAS
GASEOUS WASTES
INFORMATION
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REMOVAL
TRANSITION ELEMENT COMPLEXES
WASTES