Photoacoustic gas detector for the monitoring of sulfur dioxide content in ship emissions

Konferenz: Sensoren und Messsysteme - 19. ITG/GMA-Fachtagung
26.06.2018 - 27.06.2018 in Nürnberg, Deutschland

Tagungsband: ITG-Fb. 281: Sensoren und Messsysteme

Seiten: 3Sprache: EnglischTyp: PDF

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El-Safoury, M.; Weber, C.; Schmitt, K.; Pernau, H.-F. (Fraunhofer-Institute for Physical Measurement Techniques - IPM, 79110 Freiburg, Germany)
Willing, B. (RÜEGER SA, 1023 Crissier, Switzerland)
Woellenstein, J. (Fraunhofer-Institute for Physical Measurement Techniques -IPM, 79110 Freiburg, Germany & IMTEK, University of Freiburg, 79110 Freiburg, Germany)

Ship emissions heavily pollute marine ecosystems and are extremely detrimental to the health of humans in harbour areas. From 2020 on, the International Maritime Organization (IMO) is imposing tighter limits on global sulphur emissions. Although shipping companies can continue using heavy fuel oils, they are then obligated by international maritime law to install gas scrubbers for the purification of the exhaust gas. In addition, special exhaust gas measuring technology must be installed subsequent to the gas scrubber to detect the actually emitted SO2. We present the development of a low-cost, resonant photoacoustic (PA) gas detector for the monitoring of SO2 in marine vessels. A UV LED at 285 nm is used as light source in combination with a microphone as acoustic detector. In first experiments, we used acetone gas as a substitution for the harmful SO2 for sensor characterization. The results of the experiments show that SO2 concentrations between 0 and 111 ppm should be detectable with 2 ppm accuracy.