Why is NOx such a major concern in the U.S. and elsewhere? NOx consists of roughly 90% to 95% NO and perhaps 5% to 10% NO 2. Those associated with fossil fuel fired boilers and other furnaces are from ...

Conventional fossil fired boilers across the globe are being subjected to ever more stringent emissions limitations, despite the majority of those installations having been built during an era when ...

Nitrogen Oxides (NOx) emissions are regulated not only because they are highly reactive gases, but also due to the fact they react with VOC and Sunlight to form ground level ozone and smog. The ...

A twist on an old technique, flue gas recirculation, helps prevent slagging in the upper furnace and convective pass, according to pilot testing recently completed by APTECH CST and the Southern ...

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 ...

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.

As US federal and state environmental agencies move to further tighten standards established by the 1990 Clean Air Act Amendments on allowable emissions of nitrogen oxide (NOx) from fired-heater and ...