Implementation of CH4 (methane) Raman lidar detection system from anthropic sources
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2019
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ENERGY TRANSITION RESEARCH AND INNOVATION
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Fugitive emissions, defined as unintended or irregular leaks of gases and vapors, are an important
source of air pollution that is difficult to monitor and control. Within industrial facilities such as oil and
gas processing plants, fugitive methane emissions can be a significant source of greenhouse gas
emissions. In Brazil, as in other countries, there are specific regions with high concentration of
industrial activities, and showing high population density. These sites, including megacities like São
Paulo, are growing in size and economic activity. At the same time, there is a remarkable growth in
concerns about the environmental issues associated with these activities. In a constantly changing
world, with increasing concentrations of greenhouse gases (GHGs), among them methane (CH4) and
volatile organic compounds (VOC), mitigation of atmospheric emission these gases to contain global
warming, is of key concern, gas data suggest that fugitive emissions accounted for more than 5% of
global greenhouse gas emissions over the past 5 years. Optical remote sensing techniques as lidar can
attend the need for real time and trustable information on fugitive emissions. These techniques are
non-intrusive, of relative simple construction, thus demanding less maintenance, and are able to
provide data from distant locations with a high spatial resolution, typically up to 20 km from the
measuring local, and 3 to 4 m long segments. Besides, information on different pollutants can be
obtained simultaneously by adequate optical arrangements and data treatment methods. The
technique can supply adequate information at lower costs and less effort than other techniques. The
Cavity Ringdown Laser Spectroscopy (CRDS) technique was adopted because it is widely used in the
detection of gas samples that absorb light at specific wavelengths and also for their ability to detect
mole fractions up to the parts per trillion level. The correlation of the data between the techniques of
real-time detection becomes interesting, since practical operations, fast and with a high level of
sensitivity and precision are made. The mixing ratio of CH4 can be observed within the planetary
boundary layer. The measured methane profiles correlate with the acquisitions made with the CRDS,
however, an additional contribution of control data in which the Raman lines detect with high
sensitivity.
Como referenciar
LANDULFO, EDUARDO; MACEDO, FERNANDA M.; CORREA, THAIS; ARAUJO, ELAINE; ANDRADE, IZABEL; ARLEQUES, ANTONIO G.; MIRANDA, JULIANA T. de M.; SILVA, JONATAN da; GUARDANI, ROBERTO. Implementation of CH4 (methane) Raman lidar detection system from anthropic sources. In: ENERGY TRANSITION RESEARCH AND INNOVATION, October 1-2, 2019, São Paulo, SP. Abstract... São Paulo: Research Centre for Gas Innovation, 2019. Disponível em: http://repositorio.ipen.br/handle/123456789/30862. Acesso em: 18 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.