Hot exhaust gases flow out of the engine and into the SCR system where aqueous urea (known as Diesel Exhaust Fluid, or DEF) is sprayed onto a special catalyst. The DEF sets off a chemical reaction in the exhaust on a special catalyst that converts nitrogen oxides into nitrogen, water, and tiny amounts of carbon dioxide (CO2), natural components ...

As exhaust and reductant pass over the SCR catalyst, chemical reactions occur that reduce NOx emissions. SCR systems can reduce NOx emissions by 75 to 90%, Hydrocarbon (HC) emissions by up to 80%, and PM emissions by 20 to 30%. SCR has been successfully used to reduce emissions from stationary industrial processes for over half a century.

Diesel engines have dramatically evolved since their invention nearly 150 years ago. Today’s advanced diesel technology is a three-part system that includes engines with optimized components, controls, design, and combustion strategies; ultra-low sulfur diesel fuels and/or low-carbon renewable biodiesel fuels as well as state-of-the-art emissions control technology that …

2024年9月19日 · Dual dosing SCR systems bring the SCR closer to the engine to take advantage of the available heat, using a known technology with flexibility in packaging and potential for passive regeneration. Resources: Watch the webinar on YouTube. View the slides ###

2025年1月8日 · From the great plains to the Northeast, Mother Nature ushers in this January of a new year with a storm bringing record low temperatures and heavy snow and ice impacting more than 60 million people across 30 states. Schools closed. Power outages. Crashes on the interstate. Stranded motorists. Thousands of cancelled airline flights. Stay at home pleas from …

2024年11月11日 · “Internal combustion engines, those powered by gasoline, diesel, natural gas and propane, really are key to our current economy, and we see them...

Internal combustion engines and the fuels that they use were the topic of Alan Adler's recent interview with ETF's Executive Director Allen Schaeffer.

2025年1月10日 · "With a new administration and thousands of new policymakers in Washington, D.C., and the states, we’ll have to talk about the benefits and...

2024年11月5日 · Fuel Prices and Continued Progress on Greenhouse Gas Emissions at Stake WASHINGTON (November 5, 2024) — In proceedings before California...

Seven days ago, the build up to the 2024 election and speculation about the outcome gripped the nation. What a difference a week makes. Following a landslide election victory of the popular and electoral college votes, Republican President-elect Donald J. Trump this week has already announced several appointees to his cabinet in his incoming Administration, including Lee …