Reducing harmful diesel emissions

Our industry-first technology has the potential to significantly cut nitrogen oxide emissions in diesel engines.

In 2015 the Government estimated that exposure to nitrogen oxide (NOx) and particulate matter emissions from diesel engines lead to around 52,000 additional deaths in the UK. NOx emissions are also the primary cause of smog in major cities around the world and a growing public health concern.

This has led to growing pressure on vehicle manufacturers to reduce engine emissions, with new European NOx reduction targets for on-highway and heavy-duty diesel vehicles now so low they are almost impossible to meet.

The problem

Currently almost all new diesel vehicles are fitted with a Selective Catalytic Reduction (SCR) system to try and remove NOx produced by combustion. This system uses AdBlue™ to safely provide the ammonia required to reduce NOx into harmless nitrogen and water.

The drawback is that AdBlue™ only functions well at high exhaust temperatures, typically in excess of 250ºC. Therefore, the SCR does not necessarily operate at all engine conditions, for example, during short, stop-start commutes, particularly in urban areas or on construction sites.

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

Our solution

Our industry-first Ammonia Creation and Conversion Technology (ACCT) effectively increases the capacity of existing on engine after treatment systems.

It is an AdBlue™ conversion technology that uses waste energy to modify AdBlue™ to work effectively at lower exhaust temperatures. By greatly extending the temperature range at which SCR systems can operate our new technology significantly enhances existing NOx reduction systems.

ACCT is the only technology of its kind in the world and we are working with industrial partners to ensure its full impact on society is realised.

Meet the Game Changers

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Graham Hargrave

Professor of Optical Diagnostics

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Jonathan Wilson

Research Associate