Nitric oxide abatement with ferrous chelates
Ferrous chelates are known to enhance the absorption of nitric oxide by forming ferrous nitrosyl chelates in aqueous solutions. The ferrous nitrosyl chelate then reacts with dissolved SO/sub 2/ to produce various nitrogen/sulfur compounds and regenerates the chelate. However, oxygen present in the flue gas converts most of the Fe(II) to the inactive Fe(III) state, which results in prohibitive chelate losses. A series of bench scale runs have been made to corroborate the effectiveness of ferrous chelates for NO/sub x/ absorption and to determine the feasibility of using an electrolytic cell for ferric chelate reduction. The electrolytic cell maintains the majority of the iron in the Fe(II) state, which results in significantly lower chelate losses by reducing the required iron concentration. The electrolytic process is described. Laboratory results confirming the effect of ferrous concentration, packing height, solution temperature, and sulfur salts concentration on nitric oxide absorption are also presented.
- OSTI ID:
- 5331868
- Report Number(s):
- CONF-870822-
- Country of Publication:
- United States
- Language:
- English
Similar Records
A metal chelate process for removal of nitric oxide from flue gas
Method for removing nitric oxide from industrial gases
Related Subjects
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
ABSORPTION
AIR POLLUTION ABATEMENT
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
CONTROL
DISPERSIONS
ELECTROCHEMISTRY
ELECTROLYSIS
ENVIRONMENT
EQUIPMENT
IRON COMPOUNDS
LYSIS
MIXTURES
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SOLUTIONS
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS