The introduction of Selective Catalytic Reduction (SCR) catalysts has become established as an efficient and cost-effective technique to reduce the content of nitrogen oxides (NOx) in the exhaust gases of diesel-powered vehicles. In this form of exhaust aftertreatment, the reagent AdBlue is injected into the catalytic converter®, which converts toxic nitrogen oxides into nitrogen and water vapor. The brand name AdBlue® stands for a synthetically produced 32.5 percent solution of highly pure urea in demineralized water.
The urea or urea solution has a significantly higher purity than technical urea and must be carried in the vehicle in its own tank. AdBlue is released while driving® pumped from this tank via a special pump to the catalytic converter where it is fed into the exhaust gas flow.
LiquiSonic® sound velocity measurement in urea
Application
Urea is a synthetic product from the raw material natural gas. Urea is produced industrially from ammonia and carbon dioxide (urea synthesis). At high pressure, the intermediate product ammonium carbamate is formed, which is then endothermically converted into urea at low pressure.
AdBlue® is produced in large plants as a blending product from urea. The high-purity, synthetic urea is converted into 32.5 percent AdBlue using demineralized water®solution prepared. Transport takes place in insulated road tankers or plastic tank pallets (IBC).
As part of quality monitoring, the urea content in the end product AdBlue is determined inline® absolutely necessary. This is the maintenance-free LiquiSonic® Process measurement technology ideally suited.
In addition, the risk of unwanted product crystallization is minimized.
Installation
The LiquiSonic® Diving sensors can be easily installed at the outlet of the decomposer or mixer. The robust sensor design with no moving parts ensures long system service life.
The LiquiSonic® Controllers 30 can be connected to up to 4 sensors. This makes it possible to monitor several measuring points at the same time. With the help of the LiquiSonic® Lab Systems Point measurements of samples in the laboratory can also be carried out in a matter of seconds.
Typical measuring range:
Concentration range: 0 to 100 m%
Temperature range: -10 to 140°C
Customer benefit
Highly precise concentration monitoring of the synthesized urea or AdBlue® is essential for quality control. LiquiSonic® determines the urea concentration inline, so that you can react immediately to malfunctions and deviations.
LiquiSonic® optimizes synthesis and blending:
- Production increase: at least 0.1%
More LiquiSonic® Advantages at a glance:
- precise determination of the mixing ratio
- Maintaining consistent product quality
- complete documentation
- Integrated temperature measurement and warning limits signal undershoots and overshoots
- Avoidance of crystallization
Amortisation: < 6 Monate
AdBlue® is produced in large plants as a blending product from urea. Highly precise concentration monitoring of the synthesized urea or AdBlue® is essential for quality control. LiquiSonic® determines the urea concentration inline, so that you can react immediately to malfunctions and deviations.
