Optical property of biodiesel and its base stock in terahertz region

Distinguishing Gasoline Engine Oils of Different Viscosities Using Terahertz Time-Domain Spectroscopy

“…Many applications of THz spectroscopy have been identified [20][21], including petroleum products. Prior research using THz-time-domain spectroscopy (THz-TDS) to distinguish among petroleum and related products includes: three grades of gasoline [22], gasoline and diesel fuel [23], ethanol and gasoline mixtures [24], diesel fuel grades [25], diesel fuel solidifying point [26], biodiesel and base stocks [27], gasoline and diesel fuel [28] inflammable liquids [29], lubricating grease [30], polyglycol oils with water [31], mineral oil with additives [32], six grades of lubricating oil [33], oil base stock and additive [34], and vegetable oils [35][36]. These prior studies demonstrated potential for distinguishing petroleum products, but none evaluated the potential for distinguishing among similar gasoline engine oils of different grades/viscosities.…”

Using Terahertz Time-Domain Spectroscopy to Discriminate among Water Contamination Levels in Diesel Engine Oil

“…THz-TDS has been used to differentiate among fuelrelated products, including grades of gasoline (Al-Douseri et al, 2006), gasoline and ethanol mixtures (Arik et al, 2014b), gasoline and diesel fuel (Arik et al, 2014a;Jin et al, 2008), diesel fuel grades (Zhao et al, 2012c), diesel fuel solidifying point (Zhao et al, 2012a), and biodiesel and base stocks (Zhao et al, 2012b). Lubricating oil characterization with THz-TDS includes polyglycol oils with water (Gorenflo et al, 2006), mineral oil with additives (Naftaly et al, 2005), six grades of lubricating oil (Tian et al, 2009), oil base stock and additive (Tian et al, 2012), and vegetable oils (Hu et al, 2005;Li, 2010).…”

Spoof Plasmon Surfaces: A Novel Platform for THz Sensing

“…Hence using as our sensor readout response, the FOM values for nitrogen, gasoline, liquid paraffin and glycerin are 49, 15, 25, and 7, respectively (see Table ). This is much higher than previously reported values and makes our sensing approach very promising for application in areas where the fluids generally present low absorption losses, such as the petroleum industry . The high FOM values here are made possible by the narrow spectral features in the spectra.…”