Sensors for process optimization of CO2 scrubbers

MDEA, DEA, K2CO3, NaOH
high resistance
Maintenance-free & cost-saving
Measurement accuracy ± 0.05%
Maximizing efficiency through optimal amine concentration
The separation of carbon dioxide plays a crucial role in the fight against climate change and in reducing greenhouse gas emissions. Scrubbers are of critical importance in the process of CO2absorption. A key component in a scrubber is the scrubbing liquid, the monitoring of which is critically important. By continuously measuring the scrubbing liquid, the performance for CO2absorption can be maintained in the ideal range.
This optimizes the use of process fluids and minimizes operating costs. In this way, we combine environmental responsibility with economic efficiency. LiquiSonic® provides precise analysis and monitoring of the scrubbing liquid by means of ultrasonic measurements with an accuracy of up to ± 0.05%.
The robust plug-and-play sensor design ensures a long system service life and reduces time-consuming lab measurements. Furthermore, the measuring system extends the service life of your process plant by reducing corrosion that can occur due to overdosing.
Cost reduction through process optimization
For the effective operation of a carbon capture system, precise determination of the amine concentration is essential. Overconcentration can lead to unnecessary regeneration of incompletely loaded amine, which drives up energy costs. On the other hand, an amine concentration that is too low can result in the CO2 not being completely removed from the system. As a result, the CO2 cannot be completely stored and is released into the environment.
To address these challenges, the LiquiSonic® measuring system is already being used on a broad scale. It can continuously determine the concentration of the absorption liquid with an accuracy of up to ± 0.05%. Through the use of LiquiSonic® efficient separation of CO2 is ensured, which at the same time helps minimize the costs of energy, chemicals, and laboratory work. The LiquiSonic® measuring system therefore plays an essential role by ensuring and optimizing the efficiency and sustainability of the carbon capture process.
Contact process
The contact process (WSA) was originally developed to remove sulfur components from exhaust gases of various industrial manufacturing processes. In contrast to the double contact process, the water vapor remains in the resulting SO2. Thanks to a special vanadium-containing catalyst, the gas has no negative effects on the catalytic oxidation of SO2 to SO3 in the converter.
Finally, in the contact process, the sulfur trioxide enters the condenser, where water vapor condenses and SO3 into H2SO4 is converted. A concentration of 98 wt% is typical here. To measure the concentration directly in the line, installation of the LiquiSonic®sensors at the end of the condenser and the dilution unit is required.

Energy cost savings
> €40,000/year
Lab cost savings
> €20,000/year
Increased plant safety
Increased process performance
Process optimization through combined measurements
When considering multicomponent systems, such as in the context of Benfield process scrubbers, the precise determination of the concentration of the scrubbing solution and the salt content is an essential aspect for efficient and cost-optimized process control in the removal of CO2.
In this regard, the LiquiSonic® measuring system offers a precise and continuous solution. It enables accurate monitoring of the aforementioned process parameters, which allows a significant reduction in material and energy costs while simultaneously minimizing lab costs. In addition, precise real-time monitoring increases process safety and thus reduces the risk of production downtime.
In addition, the LiquiSonic® measuring system stands out for its robustness and durability. Even under demanding operating conditions, it reliably delivers precise measured values and is capable of detecting and documenting process fluctuations in real time.












