A system and method for treating exhaust gas are provided. The system has a source of combustion exhaust, a first fluid passageway and a second fluid passageway. The first fluid passageway directs combustion exhaust from the source into the atmosphere. The second fluid passageway directs combustion exhaust from the source back into the source. The system also has at least one sulfur-oxide-removing device. The sulfur-oxide-removing device is disposed within at least one of the first or second fluid passageways.
U.S. GOVERNMENT RIGHTS
 This invention was made with government support under the terms of Contract Number DE-AC06-76-RL01830 (CRADA number PNNL/211) awarded by the U.S. Department of Energy. The government may have certain rights in this invention.