SO2

Selective catalytic reduction (SCR) is an important emissions control technology utilized at many coal, biomass, waste-to-energy, and gas-fired power plants. Many items must be considered when designing SCR

Sulfur oxides (SO x ) have several harmful effects both to the environment, and to human and animal health. Much of the SO x in the atmosphere comes from the burning of fossil fuels by power plants and other

The Environmental Protection Agency (EPA) has moved to redesignate four new areas of Missouri, Nebraska, Ohio, and Texas as being in attainment of air quality standards for sulfur dioxide (SO2).  The proposed actions issued over the past week provide a potential reprieve for several coal power plants, which would have needed costly pollution controls to […]

SANDY HOOK, Conn.–(BUSINESS WIRE)–Environmental Energy Services, Inc. (EES), a privately held clean energy company utilizing innovative chemistry for energy efficiency, air pollution control, and water treatment for utility and industrial power plants announced today, that it has acquired the exclusive intellectual property rights and all associated assets for Amended-Silicate Technology from Novinda Holdings, Inc. The […]

Power plant SO2 and NOx emissions have decreased 92% and 84%, respectively, since Congress passed major amendments to the Clean Air Act in 1990. Meanwhile, mercury air emissions from power plants have decreased 90% since 2000, as federal limits on mercury and other hazardous air pollutants from coal-fired power plants went into effect in 2015. […]

The Environmental Protection Agency (EPA) will refrain from amending the National Ambient Air Quality Standards (NAAQS) for sulfur dioxide (SO2), retaining a 2010 rule, which it said adequately protects public health.  The agency on Feb. 25 said in a notice that a periodically required review of the primary—or health-based—rule concluded no revision was necessary. The […]

For many years, air pollution control (APC) rules and regulations have governed the design and economics of the world’s power generation fleet. These rules have had a tremendous impact, improving air quality

Residents of Texas living downwind of coal-fired power plants would be far better off today if regulators had focused on cutting particle-forming SO2 emissions rather than concentrating so keenly on ozone-causing emissions, according to a recent study conducted by researchers at Rice University in Houston, Texas. The head of the study, environmental engineer Daniel Cohan, […]

Coal-fired power plants can significantly improve wet limestone scrubbing with advanced process control. One optimization system implemented at a Japanese facility utilized enhanced regulatory control

The world’s power sector last year emitted a third of global sulfur dioxide (SO2) emissions, 14% of nitrogen oxides (NOx), and 5% of total particulate emissions (PM2.5), but those emission values have fallen drastically over the last decade even though coal power generation has seen a surge, the International Energy Agency (IEA) said in a […]

India and 73 other countries submitted their carbon emission reduction targets for 2025 and 2030—or Intended Nationally Determined Contributions (INDCs)—ahead of the deadline last week, with just two months remaining until talks to confront climate change are due to begin in Paris.  The United Nations (UN) has so far received 120 separate pledges covering 147 […]

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 […]

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, […]