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Quantum-cascade laser photoacoustic detection of methane emitted from natural gas powered engines

: Rocha, Mila V.; Sthel, Marcelo Silva; Silva, Marcelo Gomes; Paiva, Luisa Brito; Pinheiro, F.W.; Miklós, András; Vargas, Helion


Applied Physics. B 106 (2012), No.3, pp.701-706
ISSN: 0340-3793
ISSN: 0721-7269
ISSN: 0946-2171
ISSN: 1432-0649
Journal Article
Fraunhofer IBP ()

In this work we present a laser photoacoustic arrangement for the detection of the important greenhouse gas methane. A quantum-cascade laser and a differential photoacoustic cell were employed. A detection limit of 45 ppbv in nitrogen was achieved as well as a great selectivity. The same methodology was also tested in the detection of methane issued from natural gas powered vehicles (VNG) in Brazil, which demonstrates the excellent potential of this arrangement for greenhouse gas detection emitted from real sources.