DETROIT, April 11 /PRNewswire/ -- Recognizing the upward trend of growth
in clean diesel technology, Emitec Inc. helps lower the environmental impact
of diesel engines with its latest range of substrate technology for both OE
and retrofit applications.  The company delivers innovations such as its new
particulate filter and structured turbulent foil substrate solutions that
aggressively remove impurities and produce cleaner tail pipe emissions.

    Particulate Matter (PM) Filter Catalyst
    Developed by Emitec, the PM filter catalyst has the potential to reduce
particulate matter up to 80 percent in many applications including trucks, and
is particularly effective in capturing even the finest particles.  The PM
filter catalyst works on the principle of a partial flow filter, diverting a
portion of the exhaust gas as it travels down each channel of the substrate
through a stainless-steel sintered, fleece fiber material.  PM from the
exhaust gas is then deposited in the fleece material for oxidation through a
combination of heat and nitrogen dioxide (NO2).
    In addition, the Emitec PM Filter Catalyst is maintenance free.  Due to
its open construction design, it cannot become clogged or blocked like
traditional wall-flow particle filters and therefore does not require periodic
ash cleaning.  This is a major advantage from the end customer through to the
OEM in terms of total reliability and cost.
    The first OE application of the PM Filter Catalyst on MAN's new D20 engine
was announced jointly at the 2004 IAA Commercial Vehicles Show in Hannover,
Germany.  The first OE application in a diesel passenger car followed in the
beginning of 2005.  Available retrofit applications include diesel passenger
cars supplied by major OEMs and trucks through Twin-Tec in Germany.

    Structured Foil Substrates
    Emitec's new turbulent METALIT(R) substrates constructed from structured
foils provide the quantum leap in exhaust gas aftertreatment needed to meet
future performance and cost requirements.
    -- The Perforated (PE) Design METALIT(R) is made of perforated foil and
provides for the possibility of mixing and radial flow within the substrate
itself.
    -- The Longitudinal Structure (LS) METALIT(R) with a patented "counter-
corrugation" enhances the effectiveness of a 200-cpsi substrate to perform
like a 400-cpsi substrate.
    -- The Mixer (MX) substrate, constructed of foil that re-directs the
exhaust gas from one channel to another channel, greatly improves the
performance of selective catalytic reduction (SCR) systems and reduces the
packaging and length needed between the urea injector and the front face of
the hydrolysis catalyst.
    All three structured foil substrates take advantage of "turbulent flow"
characteristics to enhance performance features like backpressure, efficiency
and exhaust gas mixing for optimized catalyst performance.

    Nitrogen Oxide (NOx) Absorber and Sensor Catalyst
    The NOx Absorber is responsible for the storage of nitrogen oxides prior
to converting them by adding hydrocarbons during a regeneration phase.
Structured METALIT(R) with LS- and PE-Design permit radial flow and uniform
concentration of NOx in the absorber, allowing volume to be reduced.
Integrating the NOx sensor into the substrate itself allows for reduced
packaging and direct regeneration control.

    Pre-Turbo Catalyst(TM)
    The Pre-Turbo Catalyst(TM) is fitted very close to the engine before the
turbocharger.  There, it uses the higher exhaust gas temperatures for
effective reduction of pollutants.  Adapted coatings are used to cope with the
increased maximum temperatures of the exhaust gas close to the combustion
chamber.  The sturdy Pre-Turbo Catalyst features a small metal substrate,
thick walls and larger cells, and is mounted close to the engine, which avoids
the heat absorbing issues caused by the turbocharger.  The robust design
provides high durability and high flow, protecting engine efficiency and
performance, while significantly reducing hydrocarbon (HC) and carbon monoxide
(CO) emissions.

    Exhaust Gas Recirculation (EGR) Catalyst
    The EGR catalyst is integrated into the EGR line to protect the heat
exchanger from harmful deposits and contamination.  The catalyst was developed
in anticipation of the potential increase in EGR rates for 2007 through 2010.

    SCR-System Mixer
    The Emitec Mixer is located in the SCR system as a hydrolysis catalyst and
ensures even distribution and conversion of the urea, which is dissolved in
water.  The mixing device incorporates structured foil technology to mix the
exhaust gas in diesel engines with the SCR reductant.  The mixer was designed
to offer effective mixing in minimum space requirements by incorporating
structured corrugated foil with blades to direct the flow of exhaust gas
through a perforated, flat foil layer.  These patented design features
maximize the mixing of the reductant and exhaust gas, allowing for the urea
injector to be placed in an optimum position in the exhaust system.  The
Emitec Mixer is now in mass production for HC-SCR systems produced by a
leading retrofit supplier.

    SCR-Catalyst System
    The SCR-Catalyst System, comprised of the pre-oxidation catalyst, urea
hydrolysis catalyst and the actual SCR-Reduction Catalyst, uses ammonia to
directly reduce NOx.  With this technology, potential NOx reduction rates
range from 70 to 90 percent.  Using a structured METALIT(R) with LS- and PE-
Design, both of which create a turbulence effect, the catalyst volume can be
dramatically reduced compared to straight-channel, flow-through catalysts.
This dramatic reduction in volume enhances packaging while reducing both
weight and cost.

    About Emitec
    Emitec GmbH is the leading designer and manufacturer of metallic
substrates and diesel particulate filters for exhaust aftertreatment and
evaporative emissions.  Founded in 1986, Emitec is headquartered in Lohmar,
Germany and currently holds more than 1,400 international patents.  The
company's North American operations, Emitec Inc., are headquartered in Auburn
Hills, Mich.  Manufacturing facilities are located in Fountain Inn, S.C. as
well as Lohmar and Eisenach, Germany.  Research and development centers are
located in Lohmar and Eisenach, Germany.
    For more information, visit Emitec at the 2005 SAE World Congress and
Exposition in Booth 250 in Wayne Hall.

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