ACCTNovel NOx emission reduction system

The challenge

On average, the rate of mortality across the UK is
approximately 4.3% higher as a result of exposure to NO2.

DEFRA, 2015

Pressure on vehicle manufacturers is mounting as legislation reducing engine emissions imposes ever lower targets alongside stringent penalties for compliance failure.

New nitrogen oxides (NOx) reduction targets for on-highway and heavy-duty diesel vehicles are now so low they are almost impossible to meet. Therefore, almost all new diesel vehicles are being fitted with a Selective Catalytic Reduction (SCR) system to treat NOx emissions.

This system uses AdBlue™ to provide the ammonia required to reduce harmful NOx into harmless nitrogen and water.

However, AdBlue™ only functions well at high temperatures, typically exceeding 250ºC. Therefore, the SCR does not necessarily operate at all engine conditions, for example, during short stop-start commutes, particularly in urban areas.

What’s more, use of AdBlue™ at lower temperatures can result in severe exhaust blockages and subsequent engine damage.

Researchers at Loughborough University have developed a novel AdBlueTM conversion technology that greatly extends the temperature range at which SCR systems can operate – enhancing NOx reduction.