Development of a New Aqueous Urea Solution Storage System Using Cathodic Protection

In order to reduce CO2 emissions of diesel engines in the EU the so called Euronorm 4 was introduced by the European Commission. By injecting AdBlueŽ, the official generic name for a 32 % ureum mixture, in the exhaust pipe of diesel engines, NOx emissions can be transformed into nitrogen and water. AdBlueŽ is stored nowadays in above ground heated FRP tanks or in SS 316 underground tanks. Recently, research made clear that the use of internally coated carbon steel tanks together with an impressed current cathodic protection (ICCP) system is a far better economic and technical solution. Unless different side-effects of AdBlueŽ storage the first try-outs of the system seemed very promising for the fuel retail industry.