Electrochemical abatement of pollutants NO sub x and SO sub x in a solid-oxide electrolyte reactor
The present research program is a basic study of the electrocatalysis of the electrochemical decomposition of gaseous pollutant species NOx and SOx. The effective removal of these species is a worthy goal for utilizing coal combustion systems in order to minimize the impact of acid rain and photochemical smog. These electrochemical devices show great promise: they have no moving parts, they are quiet, and the relevant materials can tolerate the harsh conditions of exhaust systems. The heart of these devices are the solid electrolytes which already are applied in similar environments for exhaust sensors and for fuel cells. In contrast to the exhaust sensor which operates a solid electrolyte electrochemical cell in an open circuit sensor mode and the fuel cell which is a galvanic cell, the abatement cell is a electrolytic cell, with a DC power source used to reduce NOx and SOx to elemental nitrogen and sulfur, respectively at the cathode. The critical practical issues for this application are the extent of reaction of the pollutant gases, the capital costs of the systems, the lifetime cost of the system, and the operation costs. This basic study addresses the last issue, the power requirements for the operation of these cells. The authors have carried out fundamental studies of the electrolytic conductivity and electrochemical kinetics for these abatement reactions. They have investigated two electrolytes, yttria stabilized zirconia (YSZ) and erbia stabilized bismuth oxide (ESB). Individual sections have been indexed separately for inclusion on the data base.
- Research Organization:
- Stanford Univ., CA (USA). Electrocatalysis Lab.
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG22-88PC88914
- OSTI ID:
- 5925433
- Report Number(s):
- DOE/PC/88914-T2; ON: DE91007967
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electrochemical abatement of pollutants NO sub x and SO sub x in combustion exhaust gases employing a solid-oxide electrolyte
Electrochemical abatement of gaseous pollutants NO/sub x/ and SO/sub x/ in coal-combustion exhaust gases employing a solid-oxide electrolyte: Progress report No. 5, October 1--December 31, 1987
Related Subjects
ELECTROCHEMICAL CELLS
PERFORMANCE
NITROGEN OXIDES
REDUCTION
SULFUR OXIDES
AIR POLLUTION ABATEMENT
BISMUTH OXIDES
CHEMICAL REACTION KINETICS
COAL
COMBUSTORS
ELECTRIC CONDUCTIVITY
ERBIUM OXIDES
FUEL CONSUMPTION
GAS FLOW
LEADING ABSTRACT
OPERATING COST
POLLUTION CONTROL EQUIPMENT
PROGRESS REPORT
SOLID ELECTROLYTES
TEST FACILITIES
YTTRIUM OXIDES
ZIRCONIUM OXIDES
ABSTRACTS
BISMUTH COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COST
DOCUMENT TYPES
ELECTRICAL PROPERTIES
ELECTROLYTES
ENERGY CONSUMPTION
ENERGY SOURCES
EQUIPMENT
ERBIUM COMPOUNDS
FLUID FLOW
FOSSIL FUELS
FUELS
KINETICS
MATERIALS
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION ABATEMENT
RARE EARTH COMPOUNDS
REACTION KINETICS
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
010800* - Coal
Lignite
& Peat- Waste Management