NOx

The U.S. Supreme Court has curbed the Environmental Protection Agency’s (EPA’s) options for limiting emissions of greenhouse gases (GHG) from power plants, an important environmental decision that could impact the federal government’s authority to enforce other regulations. The court in a 6-3 vote, with conservatives in the majority, on June 30 said the EPA does […]

A sweeping new proposed rule published in the Federal Register by the Environmental Protection Agency (EPA) on April 6 establishes new nitrogen oxide (NOx) emissions budgets that will require fossil fuel–fired power plants in 25 states to participate in an allowance-based ozone season trading program starting in 2023. The proposal, which builds on the agency’s […]

Selective catalytic reduction (SCR) projects often focus on the final NOx emissions levels achieved, but a successful project is about much more than that. Facility owners must consider the complete scope associated with an SCR installation, from supply chain issues and ultra-low NOx emissions levels to customization requirements associated with a given application’s pressure drop […]

The U.S. Environmental Protection Agency (EPA) has issued an update and finalized a pollution rule that will require reductions in ozone emissions from power plants in 12 states this year. The update to the Cross-State Air Pollution Rule (CSAPR), issued March 15, is designed to curb emissions of nitrogen oxide (NOx)—primarily from coal-fired power plants—ahead […]

Aligning with a target set by European industry association EUTurbines, Siemens Gas and Power in January 2019 rolled out an ambitious roadmap to ramp up the hydrogen capability in all its gas turbine models to

Citing new technical information gleaned from a more modern modeling analysis, the Environmental Protection Agency (EPA) has proposed to withdraw a federal implementation plan (FIP) to control regional haze from four PacifiCorp coal-fired units in Utah and allow the state to revert to conditions set out in a 2015-submitted state implementation plan (SIP). The agency’s […]

Italian turbine maker Ansaldo Energia and carbon capture specialist Equinor are collaborating on the validation of a 100% hydrogen gas turbine combustor. Under an agreement announced on Oct. 24, Equinor (formerly Statoil) will co-fund tests that could show Ansaldo’s GT36 H-class gas turbine combustor can be operated purely with hydrogen. “The purpose of this collaboration […]

Power plant operators are always looking for ways to boost performance. A combustion optimizer designed to improve efficiency and lower emissions could help. It supports more flexible operation of boilers by

Vistra Energy will shutter four coal-fired power plants—a total 2 GW—as required by Illinois’ recently revised Multi-Pollutant Standard (MPS) rule, but CEO Curtis Morgan noted the move was “inevitable” due to the changing regulatory environment and unfavorable economic conditions in the MISO market.  The company on Aug. 21 said it will close the 54-year-old 915-MW […]

New guidance issued by the Environmental Protection Agency (EPA) on Aug. 20 to help states prepare for the second implementation period of the federal regional haze program puts emphasis on “discretion and flexibilities” they can use to comply with long-standing mandates to protect visibility in federal areas.   While it is not binding, the EPA’s […]