GE Introduces Emissions Reduction System without SCR

The new technology promises better fuel efficiency for the V250 engine

GE Marine says it has developed new technology for reducing emissions that eliminates the need for after-treatment systems using the chemical compound urea.

The technology "paves the way" for EPA Tier 3, Tier 4i, and IMO Tier III emission compliance, it said.

The system, which GE Marine plans to start selling in mid-2013 for its L250 and V250 marine diesel engines, also increases fuel efficiency.

"GE has been working for eight years to reach this breakthrough in diesel engine technology to help businesses worldwide comply with EPA and IMO emission standards," said John Manison, general manager of GE Marine.

"This new technology allows the marine industry to meet the upcoming emission compliance requirements and reduce both capital and operating expenditures.

"In addition, our engineering efforts have further reduced the already class-leading fuel consumption of the L250 engines."

Emissions treatments using Selective Catalytic Reduction systems (SCRs) require the use of a diesel exhaust fluid such as urea, which must be stored onboard, to reduce nitrogen oxides (NOx).

GE's new solution is based on advancements in the engines, improving the fuel efficiency of the L250 engines by as much as 5 percent and also imporving their torque characteristics and load response rate.

L250 engines rated at less than 2,000 kW will meet EPA Tier 3 emission levels, while the 8L250 and 12/16V250 engines rated at more than 2,000 kW will meet EPA standard path Tier 4i (interim) requirements next year.

New and impending emissions regulations have prompted much activity around emissions technology, including SCR systems and emissions monitoring tools.