Inline quality monitoring of diesel exhaust fluid (AdBlue) by using the 3ω method
| Autor: | Hans-Fridtjof Pernau, Martin Jägle, Ralf E. Bernhardsgrütter, Christoph Hepp, Jürgen Wöllenstein, Katrin Schmitt |
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| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Materials science Diesel exhaust business.industry Flow (psychology) Selective catalytic reduction 02 engineering and technology Diesel combustion 021001 nanoscience & nanotechnology Signal 020901 industrial engineering & automation Combustion process Quality monitoring Electrical and Electronic Engineering 0210 nano-technology Process engineering business Diesel exhaust fluid Instrumentation |
| Zdroj: | Journal of Sensors and Sensor Systems. 10:5-12 |
| ISSN: | 2194-878X |
| Popis: | Because diesel combustion processes produce harmful detrimental nitrous oxides, the selective catalytic reduction, an after-treatment method using diesel exhaust fluid (AdBlue) to reduce these emissions, is an important part in the cycle of the combustion process. Therefore, it is crucial to continuously monitor the quality of the diesel exhaust fluid to secure the ideal selective catalytic reduction. This article presents a platinum thin-film sensor using the 3ω method which is able to characterize the diesel exhaust fluid. By means of the 3ω method, information about the concentration of urea in water can be extracted. In this investigation, a digital lock-in amplification technique is used to execute the measurements. The results show that this sensor can determine the urea content within 1 % by weight. Moreover, besides the analysis of the 3ω signal, the 1ω signal is analyzed in depth to receive additional information about the temperature. Because the same structure can measure multiple parameters, such as concentration, temperature, and flow, the sensor might be a good alternative to the state-of-the-art diesel exhaust fluid sensor. |
| Databáze: | OpenAIRE |
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