Surface Plasmon Resonance for Crude Oil Characterization

Ooms, Matthew D.; Fadaei, Hossein; Sinton, David

doi:10.1021/acs.energyfuels.5b00340

Cited by 13 publications

(8 citation statements)

References 32 publications

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“…Assuming an average refractive index between 400 and 900 nm, these SPR wavelengths correspond to effective refractive indices of 1.511, 1.503, and 1.525 for crude oils 1, 2, and 3. The refractive indices are linearly correlated to the stock tank crude oil densities of 28.5°API, 33.5°API, and 21.1°API, similar to the work by Ooms et al Density (g/cm 3 ) plotted versus refractive index yields a correlation of: …”

Section: Resultssupporting

confidence: 79%

“…A more detailed investigation into the error could improve the sensitivity by an order of magnitude, toward 10 −4 −10 −5 RIU as is reported elsewhere. 49,50 Stepped Titration. To assess whether or not the SPR approach could measure asphaltene deposition onset, a titration of crude oil 1 was performed while the optical spectra and SPR peak wavelength were recorded.…”

Section: Energy and Fuelsmentioning

confidence: 99%

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Measuring Asphaltene Deposition Onset from Crude Oils Using Surface Plasmon Resonance

et al. 2017

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We present a surface plasmon resonance (SPR) sensor for crude oils that can be used to directly measure asphaltene deposition onset. Surface plasmon resonance describes a condition in which light incident onto a highly conductive metallic film couples into resonant charge oscillations of the metal. The SPR condition is highly sensitive to slight perturbations in the dielectric environment in the immediate vicinity of the thin-film, less than 1 μm away at visible frequencies. Here, we show that shifts in the peak surface plasmon resonant wavelength can be used to measure the onset of deposition of asphaltenes from a titration experiment. Initially, the SPR peak wavelength of the neat crude oil is measured. Next, the gradual addition of n-heptane dilutes the crude oil and produces a lower SPR peak wavelength, which results from the lower refractive index of the mixture. When the amount of added n-heptane approaches the deposition onset point, asphaltenes precipitate and are deposited onto the thin-film surface. We then observe that the SPR peak wavelength increases as the deposit is formed on the sensing surface. The asphaltenes continue to deposit on the surface until a deposit thicker than the SPR field penetration depth is reached. Even though the crude oil has been substantially diluted in n-heptane, the final SPR peak wavelength exceeds that of the native crude oil due to the dense asphaltene deposit on the surface. Three crude oils were evaluated with the SPR approach for measuring asphaltene deposition onset.

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Section: Resultssupporting

confidence: 79%

Section: Energy and Fuelsmentioning

confidence: 99%

Measuring Asphaltene Deposition Onset from Crude Oils Using Surface Plasmon Resonance

et al. 2017

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“…There are two mechanisms that can lead to the generation of plasmas in the process of laser irradiation on the sample, which includes direct ionization of the medium by multiphoton absorption and cascade ionization. ,, The laser irradiated the sample, and plasma was generated. The use of bias voltage produces the LIV signal.…”

Section: Resultsmentioning

confidence: 99%

“…Electrons release energy by collision to generate charged species. A cascade of ionization and various processes of recombination give rise to the growth of the plasma. − Upon laser irradiation of the surface of the sample, plasma was generated in the oil. Under the effect of the external electric field, the separation of positive and negative charges led to the generation of voltage.…”

Section: Introductionmentioning

confidence: 99%

Laser-Induced Voltage Application for Identification of Crude Oils

et al. 2019

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In this work, laser-induced voltage (LIV) was used to assess three various crude oils using a 248 nm ultraviolet laser. Under the same bias voltage, the peak of LIV (V p) increased with the increase in the overall laser energy irradiating the surface of the sample. The increase in the bias voltage contributed to the improvement of V p at the same laser energy. On the basis of our results, samples with more oxygen content generated more charge, which led to the higher V p. Our research indicates that LIV is a suitable approach for the identification of various crude oils.

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“…The positive outcome was that this device can be used for screening a diesel oil, but only for pass or fail due its inability to differentiate between samples with 5-15% kerosene. Additionally, the complexity of the problem can be realized based on the fact that the refractive index of diesel oil and kerosene depends on the origin of the crude oil [18], which can be a source of complexity in screening fake diesel oils by refractive index reading.…”

Section: Methodsmentioning

confidence: 99%

A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene

Kanyathare

Kuivalainen

Räty

et al. 2018

J. Eur. Opt. Soc.-Rapid Publ.

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Background: Liquid fuel adulteration has several far-reaching impacts such as environmental pollution. A widespread practice is typically the adulteration of diesel oil by kerosene. The relatively cheap price of kerosene is probably the most important reason for its usage in illegal adulteration. Herein, we demonstrate the use of a prototype optical sensor for efficient tracking of adulterated diesel oil. Methods: In this study, a prototype of an optical sensor for screening of fake diesel oil is proposed. The device exploits the phenomenon of laser light reflection from a fuel film over a roughened glass plate. The sensing mechanism of the devise is based on the refractive index mismatch between the glass and the fuel sample, and the wetting property of the fuel film over the roughened surface. For the sake of comparison, the refractive index for each of the fuel samples was measured at room temperature with the aid of an automatic temperature controlled Abbe table refractometer. The sensitivity of this prototype optical sensor was tested using training sets of diesel oil samples adulterated with low concentrations of kerosene. Results: Originally, a commercial handheld glossmeter, with a new innovation of a removable sensor head for liquid inspection is presented as a prototype sensor for the screening of possible adulteration of diesel oils with kerosene. The significant difference in the signal readings obtained from carefully prepared training sets of adulterated diesel oil composed of low percentages (5-15%) of kerosene has proven the high sensitivity of the developed sensor. Conclusions: The ability to detect low concentrations of kerosene in diesel using the newly developed hand-held prototype sensor proves its high sensitivity compared to a high-accuracy Abbe refractometer. We envisage that this proposed sensor could, in the future, be made accessible to the authorities as a mobile fake fuel measurement unit.

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Surface Plasmon Resonance for Crude Oil Characterization

Cited by 13 publications

References 32 publications

Measuring Asphaltene Deposition Onset from Crude Oils Using Surface Plasmon Resonance

Measuring Asphaltene Deposition Onset from Crude Oils Using Surface Plasmon Resonance

Laser-Induced Voltage Application for Identification of Crude Oils

A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene

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