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South Western Railway to trial emission-busting innovation

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A first-of-its-kind emissions control device is to be fitted to a South Western Railway locomotive in a bid to cut harmful emissions from diesel trains. 

It is claimed the device could reduce its hydrocarbon and nitrogen output by 90% as part of an initial trial.  

The Selective Catalytic Reduction & Continuously Regenerating Trap (SCRT), developed by Emionx, functions in a similar fashion to catalytic converters used in cars. Using platinum catalysts and various filters, the device can reduce nitrogen oxide emissions by over 80%, particulate matter by over 90%, and cut carbon monoxide and hydrocarbons by over 90%.  

A South Western Railway Class 159 diesel train is to be retrofitted with an SCRT, as well as advanced monitoring technology to analyse its emissions and performance. 

The SCRT is already in use on other types of heavy vehicles, including London buses, but this trial is the first time the technology has been adapted for rail use. 

The partnership between Eminox, train-leasing company Porterbrook and South Western Railway is being supported by the Department for Transport, delivered through InnovateUK’s First of a Kind funding. 

Eminox retrofit sales director Carlos Vicente said: “Eminox technology will help reduce diesel particulate matter from the rail network and deliver environmental benefits to the communities the railway serves. This is part of the government’s drive for a cleaner, greener economy by cutting emissions and removing diesel-only trains from the network by 2040.” 

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