The Cooperative Research Network (CRN) and eight generation and transmission cooperatives are partnering with ClearChem LLC on a demonstration of new technology to reduce SO2 emissions at the Stanton coal plant owned by Great River Energy.
This test is the third in a series of demonstrations spearheaded by the National Rural Electric Cooperative Association’s (NRECA) Cooperative Research Network and funded by a group of cooperatives seeking cost-effective environmental control technologies that will enable them to retrofit existing coal-fired plants to meet new federal air standards, said NRECA in an Aug 22 statement.
This demonstration will test the effectiveness of ClearChem’s Furnace Sorbent Injection (FSI) of micronized limestone. Environmental Energy Services, licensed applicator of the ClearChem FSI system, is also participating in the demonstration.
Since 1990, cooperatives have reduced both SO2 and NOx emissions by 65% nationwide. New air quality standards, including interstate emission reduction initiatives and regional haze requirements, are driving further reductions.
CRN is testing combinations of emerging and commercial technologies to find methods that can meet new standards affecting a range of coal-combustion emissions, including SOx, NO2, mercury and acid gases. The demonstration is occurring at Great River Energy’s Stanton plant near Bismarck, N.D.
Stanton is located on a 250-acre site on the Missouri River. The plant has one turbine generator rated at 188 MW. A second supplemental boiler was added in 1982. Stanton uses approximately 850,000 tons of coal each year.
CRN has successfully conducted demonstrations of other technologies at San Miguel Electric Cooperative’s San Miguel plant in Texas and Arizona Electric Power Cooperative’s Apache plant in Arizona.
Coal is an important fuel for the nation’s electric co-ops, NRECA pointed out. In 2012 coal accounted for roughly 70% of co-op power generation.
NRECA is the national service organization that represents the nation’s more than 900 private, not-for-profit, consumer-owned electric cooperatives, which provide service to 42 million people in 47 states.