Understanding Selective Catalytic Reduction Systems and SCR Design Considerations

Credit to Author: Aaron Larson| Date: Wed, 01 Nov 2023 10:04:37 +0000

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

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Why Sulfur Oxides Are Bad and How Flue Gas Desulfurization Technology Works

Credit to Author: Aaron Larson| Date: Tue, 01 Nov 2022 04:12:00 +0000

emissions-carbon-dioxide

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

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Power Plant Emissions Down Substantially in U.S. Since 1990

Credit to Author: Aaron Larson| Date: Wed, 19 Jun 2019 23:21:45 +0000

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. […]

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EPA to Retain Primary NAAQS for Sulfur Dioxide

Credit to Author: Sonal Patel| Date: Thu, 28 Feb 2019 14:32:15 +0000

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 […]

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Particulate Matter Should Be Focus of Air Emissions Regulations

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, […]

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