Optimal NO x removal by a selective catalytic reduction (SCR) system requires the inlet gas temperature to remain within a prescribed range. How does a baseload unit meet NO x permit limits when it’s ...

In a brief filed in November in its ongoing litigation with the U.S. Environmental Protection Agency, truck and engine maker Navistar argued that EPA violated federal law not only by allowing its ...

For nearly five years, two selective catalytic reduction (SCR) systems have operated almost around the clock at Dynegy Midwest Generation’s Baldwin Energy Complex in Baldwin, Ill. The SCR systems ...

Aiming to Meet the IMO's Tier III NOx Emission Controls Nippon Yusen Kabushiki Kaisha, Oshima Shipbuilding Co. Ltd., Mitsubishi Heavy Industries Ltd., Akasaka Diesels Limited, and Sakai Chemical ...

When it comes to reducing the nitrogen oxide (NOx) emissions of diesel-burning commercial vehicles, selective catalytic reduction (SCR) is firmly in place as today’s technology. And these systems are ...

The phrase “high efficiency” has been used to describe emerging SCR systems for NOx emission control. This term can be interpreted in a number of ways, with an obvious one being high removal ...

•Ammonia Inj.: The total mass flow rate of ammonia injected into the SCR. This is a function of the NOx concentration in the flue gas and the ammonia stoichiometric performance input value. •Steam for ...

The U.S. Environmental Protection Agency (EPA) and the California Air Resources Board (CARB) have presented preliminary proposals aimed at the alleged compliance loopholes found in current 2010 liquid ...

The U.S. Environmental Protection Agency (EPA) "has been diverted from its environmental mission and somehow talked into an environmentally hostile action," according to court papers filed by Navistar ...

Emission regulations for combustion systems have been in place for more than half a century and in the 1990’s, the Clean Air Act put a spotlight on emissions specifically from industrial boilers.

“The installation and operation of SCR is estimated to increase the electricity bill for the average Arizona Public Service residential customer by about 70 cents per week,” the EPA said. Though it ...