The Carbon Trust
Liverpool John Moores University, in partnership with XpertRule Software and Longma Clean Energy Ltd, has began a 2 year project funded by The Carbon Trust to develop a multi-purpose exhaust emissions reduction system for transport and stationary applications.
Most internal combustion engines are fitted with catalytic converters in the exhaust system to reduce the levels of pollutants being emitted to the atmosphere. The technology being developed in this project aims to reduce all the key pollutants (e.g. oxides of nitrogen (NOx), carbon monoxide (CO), particulate matter (PM) and hydrocarbons), but also give an expected CO2 saving of 10% compared with catalytic converters used in diesel applications.
Professor Al-Shamma’a, Director of Built Environment and Sustainable Technologies and Lead Researcher on this project, indicated that non-thermal discharges (NTD) in exhaust gas have been studied as a means of reducing NOx and PM emissions in diesel exhaust, NOx and cold start hydrocarbons in lean gasoline exhaust. Although NTPs can be produced in a number of ways, this project will develop a high efficiency technology to create the discharges. In the system, NOx is broken down to nitrogen and oxygen, and CO, PM and hydrocarbons are burnt off, which helps to reduce free oxygen.
Liverpool John Moores University will be leading the way in designing and constructing a laboratory-scale unit, which will be tested on a small diesel test cell and diesel car. This will be used to develop measurement and control systems, and provide data under controlled conditions.
XpertRule Software Ltd will develop instrumentation and intelligent control software for the laboratory-scale unit. It will also develop optimised automation systems to ensure the technology becomes a robust solution to stringent emissions limits and, therefore, gains market acceptance.
This work will lead to a scaled-up unit being constructed and tested on a 170 kW diesel-powered combined heating and power (CHP) unit at Longma Clean Energy Ltd.
The exhaust unit, instrumentation and control systems will be developed to ensure robust and energy efficient emissions control across the entire operating range of the car engine and CHP unit. The project aims to reduce emissions to a level that is sufficient to meet the future EURO VI standard and not just the EURO V standard.
It has been estimated that this technology could reduce CO2 emissions by over 600,000 tonnes by 2020 and over 24,000,000 tonnes by 2050.