Detection of Greenhouse Gas Precursors from Diesel Engines Using Electrochemical and Photoacoustic Sensors
| Autor: | Guilherme Lima, Laisa Brasil, Layse Campos, Helion Vargas, Maria Priscila Pessanha de Castro, Geórgia Peixoto Bechara Mothé, Marcelo Silva Sthel, Aline Rocha |
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| Rok vydání: | 2010 |
| Předmět: |
diesel engines
electrochemical sensors photoacoustic sensors Air pollution lcsh:Chemical technology medicine.disease_cause Biochemistry Article Analytical Chemistry Photoacoustic Techniques Diesel fuel Air Pollution Ozone layer Electrochemistry medicine Sulfur Dioxide lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation NOx Vehicle Emissions Pollutant Carbon Monoxide Biodiesel Chemistry Environmental engineering Atomic and Molecular Physics and Optics Greenhouse gas Environmental chemistry Nitrogen Oxides Acid rain Gasoline Environmental Monitoring |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 10, Iss 11, Pp 9726-9741 (2010) Sensors; Volume 10; Issue 11; Pages: 9726-9741 |
| ISSN: | 1424-8220 |
| Popis: | Atmospheric pollution is one of the worst threats to modern society. The consequences derived from different forms of atmospheric pollution vary from the local to the global scale, with deep impacts on climate, environment and human health. Several gaseous pollutants, even when present in trace concentrations, play a fundamental role in important processes that occur in atmosphere. Phenomena such as global warming, photochemical smog formation, acid rain and the depletion of the stratospheric ozone layer are strongly related to the increased concentration of certain gaseous species in the atmosphere. The transport sector significantly produces atmospheric pollution, mainly when diesel oil is used as fuel. Therefore, new methodologies based on selective and sensitive gas detection schemes must be developed in order to detect and monitor pollutant gases from this source. In this work, CO(2) Laser Photoacoustic Spectroscopy was used to evaluate ethylene emissions and electrochemical analyzers were used to evaluate the emissions of CO, NO(x) and SO(2) from the exhaust of diesel powered vehicles (rural diesel with 5% of biodiesel, in this paper called only diesel) at different engine rotation speeds. Concentrations in the range 6 to 45 ppmV for ethylene, 109 to 1,231 ppmV for carbon monoxide, 75 to 868 ppmV for nitrogen oxides and 3 to 354 ppmV for sulfur dioxide were obtained. The results indicate that the detection techniques used were sufficiently selective and sensitive to detect the gaseous species mentioned above in the ppmV range. |
| Databáze: | OpenAIRE |
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