What is AUS 40?
Aqueous urea
solution AUS 40 reduces nitrogen oxide emission from vessel or diesel engine
exhaust system. The solution is injected to diesel engine exhaust system before
selective reduction catalyst, consequently due to the solution reaction with
nitrogen oxide gasses emissions are converted to water vapour and nitrogen.
The quality
requirement must be compiled with ISO 18611- Marine NOx Reduction Agent AUS 40:
Parameters
|
Values
|
Unit
|
Urea Content
|
39.0 – 41.0
|
% (m/m)
|
Density at 20 oC
|
1105 – 1177
|
kg/m3
|
Refractive Index at 20
|
1.3947 – 1.3982
|
|
Alkalinity as NH3
|
< 0.5
|
% (m/m)
|
Biuret
|
< 0.8
|
mg/kg
|
Aldehydes
|
< 100
|
mg/kg
|
Insoluble Matter
|
< 50
|
mg/kg
|
Phosphate(PO4)
|
< 1.0
|
mg/kg
|
Calcium
|
< 1.0
|
mg/kg
|
Iron
|
< 1.0
|
mg/kg
|
Magnesium
|
< 1.0
|
mg/kg
|
Sodium
|
< 1.0
|
mg/kg
|
Potassium
|
< 1.0
|
mg/kg
|