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AdBlue - Frequently Asked Questions
FREQUENTLY ASKED QUESTIONS Q What is AdBlue? A AdBlue is the reagent to be used in Selective Catalytic Reduction (SCR) systems on diesel engined heavy commercial vehicles. Q What is AdBlue for? A In combination with the SCR system AdBlue will reduce the level of emissions from these engines, specifically the harmful Nitrous Oxides (NOx). Q What is SCR? A SCR is a catalyst installed in the exhaust system of the truck, bus or coach Q What is AdBlue made of? A AdBlue is a high purity, 32.5% strength urea solution. Q Does it need to meet any Quality Standards? A Yes, it needs to meet the DIN70070 quality standard (soon to be converted to an ISO standard). Q Why does AdBlue have to be so pure and meet the DIN standard? A Product which doesn't have this quality assurance could carry contaminants which will seriously damage the catalyst on your vehicle and breach the conditions of your warranty. Q Is it hazardous? A AdBlue is non-hazardous. Q What has changed to make AdBlue necessary? A European legislation states that from October 2006 commercial vehicles are only allowed to emit a certain limit of noxious fumes and this legislation is to be called Euro IV. Q What is the new emission limit? A To meet Euro IV legislation the amount of NOx emitted from the truck, bus or coach exhaust cannot be above 2g/kwhr (2 grammes per kilo watt hour). Q Where will AdBlue be used? A AdBlue is to be used on trucks and buses which are Euro IV compliant by being fitted with SCR technology. Q How will AdBlue be carried on the vehicle? A AdBlue is stored in its own tank on the vehicle. This is replenished in a similar way to refuelling. Q How does the AdBlue mix with the fuel?
A It is a common misconception that AdBlue is a fuel additive, however the new technology does not involve dosage into the fuel stream. AdBlue has its own separate tank and acts as a reagent to reduce NOx in an 'exhaust gas after-treatment system', attached to the vehicle's engine. The AdBlue is sprayed into the exhaust gas flow where it is subsequently hydrogenated before the catalytic convertor effects the breakdown nitrogen oxide (NOx) into Nitrogen (N2) and water (H2O). Therefore, it never comes into contact with the fuel line.
Q How much AdBlue will be required? A The rate of AdBlue useage is approximately 5% by volume to the rate of diesel consumption, therefore you will use about 5 litres of AdBlue to every 100 litres of diesel. Q When and how is Adblue available? A AdBlue is available now. You can refill your vehicle with AdBlue from storage on your own site which we can supply as follows:
Q Who is the manufacturer of AdBlue? A AdBlue is manufactured by a number of companies. Yara is Europe’s largest producer of AdBlue offering security of supply through its network of production plants which serve the UK. Q What involvement has Yara had with the research and development of Adblue? A AdBlue has been researched and developed by Yara over the past ten years. Yara was involved with a number of oil companies and heavy truck manufacturers as they worked towards the introduction of AdBlue. With AdBlue now established as the way forward, this working group is now striving to ensure the correct infrastructure is in place throughout Europe (Press Release: Sept 04) including the UK. Q Who distributes AdBlue in the UK? A Yara has established a European agreement for distribution of AdBlue in conjunction with Brenntag. Under the brand name Air1TM we will provide a complete package of delivery, storage and technical service in support of AdBlue sales. The unique European co-operation between the largest producer, Yara and the largest distributor, Brenntag ensures your delivery, anywhere at all times. Q How much will AdBlue cost? A The price per litre will depend upon the delivery method and quantity, but will be less than the cost of diesel. However, because AdBlue means lower emissions, engines can be tuned to offer better fuel consumption and therefore lower vehicle running costs are expected. Q Will SCR vehicles be available before the Euro IV introduction? A While Euro IV is to be fully implemented in October 2006, any newly designed commercial vehicle engines developed by the manufacturer after October 2005 must meet Euro IV (this is called type approval). European manufacturers will be offering SCR vehicles requiring AdBlue from early 2005. Therefore, commercial vehicle operators wishing to take advantage of the lower running costs that this technology offers can do so earlier. Q Can SCR be retro-fitted to existing fleets? A There are a number of technology providers who do offer this possibility. This can be of particular benefit to the bus sector who need to achieve emission limits set by local authority policy.
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