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SCR catalytic converter/silencer combination

The new silencer SCR combination (KeSS)

The “KeSS” research project (Compact and Efficient Exhaust Gas Aftertreatment for minimizing Nitrogen Oxides and Noise Emissions) aims at developing a compact exhaust system. Till date, separate systems have been used, which take up a lot of space and add weight. Neither of these separate systems is new in principle; silencers in particular have been built and used since the introduction of internal combustion engines. Exhaust gas aftertreatment systems based on SCR technology have also been widely used.

As a result of the project, the silencer and SCR catalytic converter components can now be combined into a single unit, thus eliminating essential interface components and creating a very compact unit.

Compared to conventional systems, Nießing’s silencer-SCR unit is characterized by the following attributes:

  • Compact design
  • Thus, a lighter structure design
  • All this with maximum noise reduction
  • KeSS stands for a compact and efficient silencer/SCR combination

A wide range of customized solutions


Exhaust silencers

Operators of power plants are required to comply with relevant environmental regulations, for example noise levels. Nießing treats the exhaust system - from the outlet of the power generator (boiler, engine, ...) to the chimney orifice - as a complex unit during acoustic testing.


Plant construction / steel chimney construction

Nießing always literally outgrows itself when it comes to plant construction: Be it supply or exhaust air towers, steel chimney construction or turnkey exhaust air/flue gas systems - Nießing carries out the engineering, planning, construction, commissioning, monitoring and maintenance of industrial chimney systems that direct both supply and exhaust air in the right direction.


Internationally agile

Nießing operates worldwide and has numerous established reference projects at numerous international locations.