Urea-based solutions for reducing nitrogen oxides IMPAG Schweiz

Contact person

Marco Shibli

Business Unit Director / Member of the Mgmt. Board

IMPAG AG

+41 43 499 25 83 E-mail LinkedIn

The reduction of nitrogen oxides in the presence of urea has two meanings: reducing the amount of harmful nitrogenous compounds and, in chemical terms, the action of urea as a reducing agent. We often hear both of these meanings in the context of wood burning power stations and motor vehicles.

Wood burning power stations

Waste wood is an increasingly popular energy source for industrial and private wood burning power stations. By burning wastes consisting of wood, a renewable raw material, power stations contribute to a more environmentally friendly form of alternative energy.

To clean the flue gas from wood burning power stations, liquid urea is sprayed in through jets. This can reduce nitrogen oxides by up to 80%.

Our product range:

As a 40% or 45% solution, in bulk or IBC
As a solid in Big Bags or 25 kg PE Block Bags

Motor vehicles

Known by the name AdBlue®, urea in the form of a 32.5% solution is used for nitrogen oxide reduction in motor vehicles. Given tighter regulations, new diesel cars and trucks now come with an AdBlue® system straight from the factory. Older cars are currently being retrofitted. AdBlue® is dosed into the exhaust system upstream from the SCR catalytic converter. The conversion of nitrogen oxide into water and nitrogen reduces the amount of harmful NOx in the exhaust gas by 90%, thus reducing the burden on the environment.

We have tailored solutions available for your motor vehicles and fleets.

Our product range:

In bulk

Chemical reduction at a glance
NH₂CONH₂ + H₂O	➔	2 NH₃ + CO₂
Thermolysis and hydrolysis of urea to release ammonia
4 NO + 4 NH₃ + O₂	➔	4 N₂ + 6 H₂O
Selective catalytic reduction (SCR) at temperatures above 250 °C

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