Selective catalytic reduction (SCR) systems employing a urea-water solution inject a measured dose of aqueous urea into exhaust gases, where thermal decomposition and hydrolysis generate ammonia. This ...

Pollutants emitted from combustion sources have been regulated by local and federal governments since the early 1960s. Specific rules vary by state and air district, but they generally apply to ...

YANMAR Marine International has introduced its innovative Selective Catalytic Reduction (SCR) system, designed to significantly cut NOx emissions from commercial vessels with engines exceeding 130 kW ...

Recent changes to the SCR Guidelines have altered how NOx measurement accuracy is assessed for catalyst monitoring. The former ±5% accuracy requirement has been replaced by a more flexible but less ...

Diesel exhaust fluid is used in selective catalytic reduction technology to convert nitrogen oxides (NOx) into nitrogen and water, helping meet EPA emissions standards. Cummins and Paccar announced ...

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.

Today’s workboat operators must navigate increasingly stringent IMO and EPA environmental and emissions regulations in and around ports and rivers. As the drama unfolds, selective catalytic reduction ...

Ask a group of diesel truck owners whether a modern Power Stroke can last 1 million miles, and you’ll probably start an argument. Older diesels were simpler, without diesel particulate filters, ...