Reducing Emissions with SWR and Eminox

In 2019, Porterbrook began working with South Western Railway (SWR) and Eminox, the exhaust manufacturer, to trial ground-breaking, emissions-reducing technology which could be rolled out to hundreds of diesel trains across the UK’s rail network. The project’s green credentials are emphasised by its commitment to sustainability, innovation and the responsible use of energy and resources.

Eminox retrofit technology helps reduce diesel particulate matter from the rail network, delivering environmental benefits to communities served by the railways. The partnership aims to reduce diesel emissions by fitting a catalyst that could reduce NOx (nitrous oxide) emissions by over 80% and CO (carbon monoxide) and hydrocarbons by over 90% from current levels. The project could help achieve SWR’s target of a 56% reduction in traction carbon emissions by 2023/24.

Porterbrook’s investment in the Eminox technology is supported by the Department for Transport through InnovateUK’s first-of-a-kind funding – FoaK2. The funding enables the trial fitment of Eminox SCRT® technology to an SWR Class 159 diesel multiple unit. Once the trial is completed, the innovation is likely to be deployed across a number of existing fleets.

State-of-the-art telemetry will be fitted to the trial Class 159 to provide real-time diagnostics and performance data. This first on-rail application incorporates solving rail-specific challenges, such as overcoming high exhaust temperature duty cycles, drawing on proven technologies from other sectors.

The project is part of the government’s drive towards a cleaner, greener economy by cutting emissions and removing diesel-only trains from the network by 2040.

Mary Grant, CEO of Porterbrook, said: “Porterbrook believes by partnering with Eminox, we can accelerate the delivery of cleaner and more environmentally friendly trains to Britain’s railways.”