Petroleum hydrocarbon detection with long period gratings

Falate, Rosane; Kamikawachi, Ricardo Canute; Fabris, José Luí­s; Müller, Márcia; Kalinowski, Hypolito José; Ferri, Francesco; Czelusniak, L.K.

doi:10.1109/imoc.2003.1242702

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…For the fuel analyses the fibre with the LPG was inserted into a glass cell, through two side openings. Two additional openings (in the top and bottom of the glass cell) were employed to insert and to drain the samples [17]. Details on the glass cell are shown in figure 1.…”

Section: Methodsmentioning

confidence: 99%

Application of a long-period fibre grating-based transducer in the fuel industry

Possetti

Côcco

Yamamoto

et al. 2009

Meas. Sci. Technol.

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This work shows prospects of long-period fibre grating applications as transducers for fuel conformity analysis. The proposed long-period grating transducer was employed to assess the gasoline conformity in commercial gas stations. Grating responses were used to train and validate a radial base function topology of an artificial neural network. The obtained results show that fibre optic sensors supervised by artificial neural networks can integrate systems for smart sensing with high applicability in the petrochemical field. The radial base function had reached a correct classification probability of approximately 94%. The device applicability in the analysis of hydrated ethanol fuel was also investigated by measuring the concentration of ethanol in ethanolwater mixtures. The results showed that the developed transducer can be used to infer the ethanol-water concentration with a resolution of up to 0.23%.

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Section: Methodsmentioning

confidence: 99%

Application of a long-period fibre grating-based transducer in the fuel industry

Possetti

Côcco

Yamamoto

et al. 2009

Meas. Sci. Technol.

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“…Grating spectra are recorded using an optical spectrum analyser (Anritsu MS9710B, wavelength stability of ±5 pm) set to a resolution in the range between 0.07 nm and 0.1 nm, and a LED (MRV Communications, central wavelength of 1547.1 nm and half bandwidth of 54.8 nm). The fibre with the device is inserted into a glass cell with a total volume of 100 mL and four openings, two of them used to insert the fibre optic and the other two used to load and unload the samples [15]. With the grating positioned in the cell, fibre bending and/or undesired strain interferences in the sensor response are avoided by attaching one of the fibre tips to a support and by guiding the other one (with the 30 g mass fixed on it) through a pulley.…”

Section: Methodsmentioning

confidence: 99%

Salinity measurement in water environment with a long period grating based interferometer

Possetti

Kamikawachi

Prevedello

et al. 2009

Meas. Sci. Technol.

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In this work, a comparative study of the behaviour of an in-fibre Mach-Zehnder interferometer for salinity measurement in a water solution is presented. The fibre transducer is composed of two nearly identical long period gratings forming an inseries 7.38 cm long device written in the same fibre optic. Two inorganic and one organic salts (NaCl, KCl, NaCOOH) were characterized within the concentration range from 0 to 150 g L −1. For the long period grating interferometer, the average obtained sensitivities were −6.61, −5.58 and −3.83 pm/(g L −1) for the above salts, respectively, or equivalently −40.8, −46.5 and −39.1 nm RIU −1. Salinity measured by means of fibre refractometry is compared with measurements obtained using an Abbe refractometer as well as via electrical conductivity. For the long period grating refractometer, the best resolutions attained were 1.30, 1.54 and 2.03 g of salt per litre for NaCl, KCl and NaCOOH, respectively, about two times better than the resolutions obtained by the Abbe refractometer. An average thermal sensitivity of 53 pm °C −1 was measured for the grating transducer immersed in water, indicating the need for the thermal correction of the sensor. Resolutions for the same ionic constituent in different salts are also analysed.

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“…Possible causes for inland oil spills include pipeline leaks, road-tanker accidents, insufficient bonding, aircraft accidents, wars, and conflicts. It is therefore essential to develop methodologies to detect petroleum in soil [7][8][9][10][11][12][13][14] and water bodies [15][16][17][18] to assess damage and develop solutions for places contaminated by petroleum spills [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Artificial Intelligence Assisted Mid-Infrared Laser Spectroscopy In Situ Detection of Petroleum in Soils

et al. 2020

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A simple, remote-sensed method of detection of traces of petroleum in soil combining artificial intelligence (AI) with mid-infrared (MIR) laser spectroscopy is presented. A portable MIR quantum cascade laser (QCL) was used as an excitation source, making the technique amenable to field applications. The MIR spectral region is more informative and useful than the near IR region for the detection of pollutants in soil. Remote sensing, coupled with a support vector machine (SVM) algorithm, was used to accurately identify the presence/absence of traces of petroleum in soil mixtures. Chemometrics tools such as principal component analysis (PCA), partial least square-discriminant analysis (PLS-DA), and SVM demonstrated the effectiveness of rapidly differentiating between different soil types and detecting the presence of petroleum traces in different soil matrices such as sea sand, red soil, and brown soil. Comparisons between results of PLS-DA and SVM were based on sensitivity, selectivity, and areas under receiver-operator curves (ROC). An innovative statistical analysis method of calculating limits of detection (LOD) and limits of decision (LD) from fits of the probability of detection was developed. Results for QCL/PLS-DA models achieved LOD and LD of 0.2% and 0.01% for petroleum/soil, respectively. The superior performance of QCL/SVM models improved these values to 0.04% and 0.003%, respectively, providing better identification probability of soils contaminated with petroleum.

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Petroleum hydrocarbon detection with long period gratings

Cited by 7 publications

References 6 publications

Application of a long-period fibre grating-based transducer in the fuel industry

Application of a long-period fibre grating-based transducer in the fuel industry

Salinity measurement in water environment with a long period grating based interferometer

Artificial Intelligence Assisted Mid-Infrared Laser Spectroscopy In Situ Detection of Petroleum in Soils

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