World’s most difficult retrofit? 92 RCVs in Westminster to become Euro VI & ULEZ ready


The City of Westminster and operator Veolia have ordered a retrofit of 92 Refuse Collection Vehicles (RCV) for the upcoming Ultra-low Emission Zone in London. As the first ever Euro VI RCV fleet retrofit, the combination of Amminex, a Faurecia company, and Eminox technology has removed the blocking point for upgrading this vehicle type.

92 Refuse Collection Vehicles in the City of Westminster will soon become near-zero polluting vehicles. The City of Westminster and its operator Veolia have chosen Eminox and partner Amminex, a Faurecia company, to upgrade a fleet of RCVs thus allowing them to operate within London’s forthcoming Ultra-low Emission Zone.

READ MORE Revolutionary technology helps improve London air quality

The retrofit order marks the first time a fleet of RCVs will be upgraded to Euro VI equivalent levels, and the Eminox/Amminex combo is so far the only solution having been approved by the official Clean Vehicle Retrofit Accreditation Scheme (CVRAS)  for retrofitting RCVs. Cllr Tim Mitchell, Cabinet Member for Environment and City Management, said: “Poor air quality is a major concern for our residents – that’s why we’re using new technology to tackle the problem in a world first.

Most challenging retrofit conditions
According to the CVRAS web page, RCVs are “One of the most challenging vehicle types in terms of emissions performance […]. This is because their slow speed stop-start operation pushes exhaust after-treatment systems to the limit.”

The combination of using ASDS™ solid ammonia technology from Amminex and SCR catalyst technology from Eminox has opened the door to addressing the emissions problem even at very low exhaust temperatures on the challenging RCV drive cycle.

“The two first demonstration vehicles have been on the road for over a month. Our data from the online NOxTracker™ tool shows an average NOx reduction of more than 94 percent under extremely difficult driving conditions. This could very well be the most challenging retrofit conditions ever, and we are proud to see the ASDS system delivering this excellent performance,” said Fabien Milanesi, General Manager of Amminex.

The homologation criteria in London are very ambitious, and the test vehicles have proven the Eminox-Amminex partnership to be a competitive solution. Many cities across Europe are struggling to improve air quality, and the homologation data from London are proof that there are no technical arguments for slacking the RCV emission requirements.

“If we can do it here, we can do it anywhere. People living in other cities than London have a right to clean air, too” said Fabien Milanesi.

Screenshots from the NOxTracker, showing Live DeNOx performance data of the two demo vehicles.  Even though the slow driving means very low exhaust temperatures, the DeNOx performance is still exceptionally good.

Retrofit: The fast and cost-efficient road to better air quality
Upgrading the garbage trucks instead of replacing them with new and cleaner ones bears several advantages. From a financial perspective, it makes sense to be able to upgrade around 25 vehicles for the same price as buying a new one.

”Retrofitting the RCVs with ASDS is a fast and cost-efficient way to improve the air quality for the citizens in Westminster.Our use of gaseous ammonia safely stored in our ASDS™ system has removed the blocking point for retrofitting this very demanding vehicle type. The City of Westminster and Veolia have shown the way for better air quality not only in London, but for all major cities dealing with air pollution issues,” Fabien Milanesi continues.

About ASDS™
The main invention behind the Ammonia Storage and Delivery System, ASDS, is the ability to safely store reactive ammonia gas in solid state by binding it to a salt called AdAmmine™. When heated, AdAmmine releases the gas, which is then accurately dosed to the exhaust and SCR catalyst, thereby converting toxic NOx to harmless nitrogen and water. Compared to conventional liquid-based solutions, the use of gaseous ammonia is a quantum leap in reducing NOx emissions where they hurt the most: During slow, urban driving in densely populated areas.







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