Farm Tractors Use SCR to Meet Tier IV Regulations: How does it work?

September 17, 2010 at 9:55 AMRing Power

This blog post is a continuation of how Challenger farm tractors are meeting the Environmental Protection Agency's new Tier IV interim regulation for offroad machinery, which begins January 1, 2011. Growers are in need of a balanced solution, investment versus operating costs. Challenger's brand of Selective Catalytic Reduction (SCR), called e3, proposes to help meet these challenges with higher fuel savings and fewer particulate matter, all without a loss of power, and in some instances more power.

So what exactly is SCR? And how does it work?how does scr work?

Selective Catalytic Reduction, or SCR, was first introduced in the 1970’s to power plants burning fossil fuels to reduce their nitrogen oxides (NOx) outputs. This technology continued to grow through the 1980’s and is now commonplace. SCR is a multi-stage chemical reaction that efficiently reduces the amount of Nox. The system is simple, consisting of a tank to hold the diesel exhaust fluid (DEF), a metering mechanism, an injector, and the SCR catalyst. The metering device communicates with the engine ECU to determine how much DEF to inject. The DEF is inject into the hot diesel exhaust stream after it leaves the turbo charger. The fluid evaporates, freeing ammonia (NH3), and the ammonia reacts with the Nox to form a new molecule. That compound then passes through the SCR catalyst to be broken down into water, H2O and nitrogen (N2).

► Selective Catalytic Reduction
    – Chemical process used in industry and on-road markets

    – Drastic reduction of NOx

► SCR uses:
    – Combination of hardware, software & diesel exhaust fluid (DEF) - Urea

► After-treatment
    – Benefits customers

Follow our next posting: reviewing the properties of Deisel Exhaust Fluid. Please do not hesitate to contact our agrticultural division with any questions regarding Challeneger's e3.

Ring Power' Agricultural Division sells and leases new and used Challenger Agricultural and Farm Tractors throughout Florida and the Southeast, with service and repair facilities located in Perry, Tallahassee, Lake City, Gainesville, Jacksonville, Ocala, St. Augustine and Tampa. Ring Power also supplies a range of farm implements and attachments from Sunflower disc harrows, field cultivars and grain drills, SprayCoupe sprayers, RoGator ag sprayers, TerraGator, Diamond Boom Mowers, and Land Pride grooming mowers.

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What is e3 and how will it reduce your farm tractor's emissions?

August 30, 2010 at 9:01 AMRing Power

The e3 system is AGCO's brand for selective catalytic reduction or SCR. AGCO introduced e3 before the 2011 Tier 4 regulation, because there was a market demand for powerful and fuel-efficient agricultural tractors. The exhaust gas recirculation or EGR optione3 emissions reduction will remain until 2011, at which time it will no longer be in compliance, and production will end.

Energy: Since e3 equipped engines deal with the regulated pollutants after the exhaust gas has left the engine, these engines create more power. This is after-treatment.

Economy: When e3 was introduced, AGCO and Challenger Tractor advertised up to 15% savings versus competitive (tier 3, EGR) engines. In fact, testing was completed at the Nebraska Test Lab and the results (made public in December of 2009) showed that e3-equipped tractors save up to 17% over comparable tractors.

Ecology: In current Tier 3 products, e3 reduces particulate matter by up to 70% and brings the NOx emissions to near Tier 4 interim levels.

e3 is AGCO's brand of SCR or Selective Catalyitic Reduction

Energy: After-Treatment for Exhaust Emissions

Economy: Up to 17% Fuel Savings

Ecology: 70% Fewer Particulate Matter

Watch this blog as Ring Power's agricultural division continues to discuss Tier IV emissions and Challenger's e3 initiative. Next posting we will reveal details on how SCR works.

Ring Power sells and leases new and used Challenger Agricultural and Farm Tractors throughout Florida and the Southeast, with service and repair facilities located in Perry, Tallahassee, Lake City, Gainesville, Jacksonville, Ocala, St. Augustine and Tampa. Ring Power also supplies a range of farm implements and attachments like Sunflower disc harrows, field cultivars and grain drills, SprayCoupe sprayers, RoGator ag sprayers, TerraGator, Diamond Boom Mowers, and Land Pride grooming mowers.