Quantification of Ethanol Concentration in Gasoline Using Cuprous Oxide Coated Long Period Fiber Gratings

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Monteiro Silva, F (Autor) FCUP; Santos, JL (Autor) FCUP; de Almeida, JMMM (Autor) FCUP; Coelho, L (Autor) FCUP

Revista

Título: IEEE Sensors Journal

Vol. 18

Páginas: 1493-1500

ISSN: 1530-437X

Editora: IEEE

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 9 Citações

Outras Informações

ID Authenticus: P-00N-9ZT

DOI: 10.1109/jsen.2017.2782566

Abstract (EN): It is reported a new optical sensing system, based on long period fiber gratings (LPFGs) coated with cuprous oxide (Cu2O), for the quantification of ethanol concentration in ethanol-gasoline mixtures. The detection principle is based on the spectral features dependence of the Cu2O coated LPFGs on the refractive index of the surrounding medium. The chemical constitution of the ethanol-gasoline samples was obtained by gas chromatography mass spectrometry (GC) and GC thermal conductivity detection. Two different modes of operation are presented, wavelength shift and optical power shift mode of operation, with good linear relations between ethanol concentration and the corresponding spectral features of the LPFGs, R-2 = 0.999 and 0.996, respectively. In the range of ethanol concentration up to 30% v/v, the sensitivities were 0.76 +/- 0.01 nm/% v/v and 0.125 +/- 0.003 dB/% v/v with resolutions of 0.21% v/v and 0.73% v/v and limits of detection of 1.63% v/v and 2.10% v/v, for the for the same operation modes, respectively.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8