NOx

The U.S. Supreme Court in a 5–4 vote blocked enforcement of the Environmental Protection Agency’s (EPA’s) final “Good Neighbor Plan,” a rule intended to significantly cut smog-forming nitrogen oxide (NOx) pollution from power plants and other industrial facilities in 23 states. In the meantime, the applicants, which include the states of Ohio, Indiana, and West […]

The U.S. Environmental Protection Agency (EPA) has denied an industry petition seeking to delist stationary combustion turbines from the agency’s list of hazardous air pollutants (HAP) major source categories regulated under section 112 of the Clean Air Act (CAA). The agency’s final action on April 11 responds to an August 2019 petition filed by several […]

U.S. coal power plant emissions in 2023 showed dramatic reductions in air pollutants, owing mainly to coal plant closures. According to the U.S. Environmental Protection Agency (EPA), compared to 2022, sulfur dioxide emissions fell by 24%, nitrogen oxides (NOx) by 15%, carbon dioxide by 7%, and mercury by 17%. Over the years, coal plants have […]

GE Vernova will collaborate with Japanese integrated heavy industry group IHI Corp. to develop a retrofittable 100% ammonia-capable gas turbine combustion system that would be compatible with GE’s 6F.03, 7F, and 9F models, targeting a potential commercially available product by 2030. The companies on Jan. 24 signed a joint development agreement (JDA) that formally launched […]

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

Marking a significant inroad to establish a South Korean foothold in the world’s gas turbine technology market, heavy industrial company Doosan Enerbility this summer began commercial operation of its first

As the quest to develop a net-zero carbon emissions electricity grid marches on, global entities like the International Energy Agency (IEA) increasingly point to a big role for carbon capture, utilization, and storage (CCUS). The IEA goes so far as to say reaching net-zero will be nearly impossible without CCUS. Proposed governmental greenhouse gas emissions […]

The Environmental Protection Agency (EPA) on March 15 issued the final “Good Neighbor Plan,” its latest iteration of the Cross-State Air Pollution Rule (CSAPR) that could require coal, oil, or gas steam power plants in 22 states to reduce their nitrogen oxide (NOx) emissions levels by 50% by 2027 compared to the 2021 ozone season. […]

GE Gas Power announced on Dec. 6 that it has deployed an “innovative technical solution” on four TM2500 aeroderivative gas turbines at the California Department of Water Resources’ (DWR’s) sites in Yuba City and Roseville, California (Figure 1). The solution reportedly reduced nitrogen oxide (NOx) and carbon monoxide (CO) emissions by more than 90%, surpassing […]

A group of researchers found that “Adopting electric end-use technologies instead of fossil-fueled alternatives, known as electrification, is an important economy-wide decarbonization strategy that also reduces criteria pollutant emissions and improves air quality.” Findings from the study conducted by nine researchers—four from EPRI, four from Ramboll, and one from the Oak Ridge National Laboratory—were published […]