DB Cargo and DB Cargo UK test green fuel to replace diesel in locomotives

DB Cargo and DB Cargo UK test green fuel to replace diesel in locomotives

RailFreight.com — 2023-03-21

Land transportation

DB Cargo and its British subsidiary, DB Cargo UK, have carried out load bank tests to operate a Class 60 Locomotive fuelled with Hydrotreated Vegetable Oil (HVO) fuel instead of diesel. HVO can in fact be used as a replacement fuel for diesel without the need for new or different components.

In other words, locomotives currently running on diesel may start running on HVO, speeding up the process of reducing CO2 emissions in the rail sector. HVO causes around 90% fewer greenhouse gas emissions. The tests were carried out at the Traction Maintenance Depot (TMD) in Toton, in central England.

HVO is a fuel very similar to diesel. The main advantage is that it can be produced by processing renewable waste lipids such as vegetable oil, tallow, and used cooking oil. Burning 1,000 litres of HVO will produce 195kg of CO2, whereas 1,000 litres of diesel will produce around 2,700 kg of CO2.

A comparative test to assess HVO potential

The tests consisted of a comparison of emissions made with a Class 60 Locomotive running on traditional diesel and then on HVO. The locomotive was therefore filled up with red diesel and connected to the Toton TMD Load Bank facility to test its performance. “To accurately monitor exhaust gas emissions at each power position from Idle to Full Load, a purpose-built exhaust extension tube was fitted to the locomotive to calm the exhaust gases”, DB Cargo UK specified.

After the first tests with diesel were run, the locomotive was drained and refuelled with HVO. As DB Cargo UK stated, the purpose of these tests is to assess the potential of HVO as an alternative duel. In both instances, the emissions of nitrogen oxide, carbon monoxide, carbon dioxide, hydrocarbons, and particle mass were measured twice in a standardised measuring cycle at three load points.

Not the first example of HVO locomotives

Introducing alternative fuels is one of the main challenges in the rail industry. DB Cargo UK is not the first company to explore the possibility of implementing HVO as a fuel for locomotives. At the beginning of March, the German port of Bremerhaven started running its shunting locomotives solely on HVO. DB Cargo is involved in this project with Eisenbahnen und Verkehrsbetriebe Elbe-Weser, and FLEX Bahndienstleistungen, which together use 15 locomotives in the port.