NOx

In a report released this week, M.J. Bradley & Associates found that in 2013 power plant SO2 emissions were 80% lower and NOx emissions were down 74% compared to releases in 1990—the year Congress passed major amendments to the Clean Air Act. The report, Benchmarking Air Emissions of the 100 Largest Electric Power Producers in […]

Several Arizona and New Mexico–based utilities will be required to install pollution controls at the coal-fired Four Corners Power Plant to curb sulfur dioxide (SO2) and nitrogen oxide (NOx) under a settlement reached with the Environmental Protection Agency and the Justice Department. The settlement involves the Arizona Public Service Co. (APS), the operator and primary […]

Selective catalytic reduction (SCR) systems installed in steam generators for NOx reduction are ordinarily designed for full boiler load conditions, when SCR inlet temperatures normally exceed unit-specific

In an effort to reduce air pollution from the Navajo Generating Station (NGS)—a coal-fired power plant located near Page, Ariz.—the Environmental Protection Agency (EPA) finalized a rule on July 28 that will result in the permanent shutdown of one of NGS’s three units. The EPA had issued an initial proposal in February 2013 but invited […]

According to a report released on May 28, NOX and SO2 emissions in 2012 were 74% and 79% lower, respectively, than they were in 1990 when Congress passed major amendments to the Clean Air Act. Although power plant CO2 emissions have actually increased 13% from 1990 levels, the trend has been down in recent years, […]