scholarly journals Effects of Neutralization, Decoloration, and Deodorization on Polycyclic Aromatic Hydrocarbons during Laboratory-Scale Oil Refining Process

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Yuxiang Ma ◽  
Longkai Shi ◽  
Yulan Liu ◽  
Qiyu Lu
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Refining Process ◽  
Laboratory Scale ◽  
Oil Refining ◽  
Security Risk ◽  
Experimental Conditions ◽  
Polycyclic Aromatic ◽  
Deodorized Oils

The influence of technological operations during oil refining process on polycyclic aromatic hydrocarbons (PAHs) in neutralized, bleached, and deodorized oils was investigated on the basis of laboratory-scale study. Under the best experimental conditions, benzo[a]pyrene decreased by 85.1%, 99.7%, and 40.8% in neutralized, bleached, and deodorized oils, respectively. Total of 16 analytes decreased by 55.7%, 87.5%, and 47.7%, respectively. Bleaching with activated charcoal was the most efficient procedure to reduce PAHs in crude oil. Neutralization had a modest influence on sixteen analytes; however, deodorization was only responsible for a slight decrease in the light PAHs and heavy PAHs contents. Data obtained in this study suggest that the use of activated carbon during oil refining process is highly recommended; moreover, these results provide a useful guidance for oil refining plant to reduce security risk and ensure the quality of the vegetable oil products.

Radical cation formation during the adsorption of polycyclic aromatic hydrocarbons on platinum oxide

1973 ◽  
Vol 26 (1) ◽  
pp. 221 ◽  
Author(s):  
JL Garnett ◽  
KJ Nicol ◽  
A Rainis
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Radical Cation ◽  
Aromatic Hydrocarbons ◽  
Hyperfine Splitting ◽  
Radical Cations ◽  
Platinum Oxide ◽  
Adsorbed Species ◽  
Experimental Conditions ◽  
Polycyclic Aromatic

Experimental conditions are reported for resolving the hyperfine splitting of e.p.r. spectra obtained from the interaction of polycyclic aromatic hydrocarbons with platinum oxide. By contrast with earlier interpretations where only a singlet was obtained even with perylene, the present results indicate that the adsorbed species are radical cations.

Study dearomatization of diesel fuel under the infulence of magnetic field by IR spectroscopy

2021 ◽  
pp. 2150122
Author(s):  
B. G. Abdulov ◽  
A. A. Hasanov
Keyword(s):  
Magnetic Field ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Sulfuric Acid ◽  
Ir Spectroscopy ◽  
Aromatic Hydrocarbons ◽  
Diesel Fraction ◽  
Oil Refining ◽  
Purification Process ◽  
Before And After ◽  
Polycyclic Aromatic

The purification process of polycyclic aromatic hydrocarbons was carried out by extraction of diesel fraction from the primary oil refining using the effect of magnetic field. A mixture of N-methylpyrrolidone with sulfuric acid was used as an extractant. The content of aromatic hydrocarbons in the diesel fraction decreased by 39.8% under normal conditions and by 50.8% under the influence of magnetic field after extraction. The samples were investigated by infrared (IR) spectroscopy method before and after extraction. Vibartional modes corresponding to different atomic bonds have been observed. Deodorization of diesel was determined by interpreting obtained modes.

scholarly journals Extractive purification of hydro-treated gas oil with N-methylpyrrolidone

2017 ◽  
Vol 82 (1) ◽  
pp. 107-116
Author(s):  
Kahina Bedda ◽  
Boudjema Hamada ◽  
Nikolay Kuzichkin ◽  
Kirill Semikin
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Nitrogen Content ◽  
Aromatic Hydrocarbons ◽  
Diesel Fuel ◽  
Liquid Extraction ◽  
Gas Oil ◽  
Experimental Conditions ◽  
Clean Diesel ◽  
Liquid Liquid Extraction ◽  
Polycyclic Aromatic

The purification of a hydrotreated gas oil by liquid-liquid extraction with N-methylpyrrolidone as solvent has been studied. The results showed that this method, under appropriate experimental conditions, has reduced sulphur content of the gas oil from 174 ppm to 28 ppm, nitrogen content has decreased from 58 ppm to 15 ppm, aromatics content has diminished from 27.1 % to 13.8 % and the polycyclic aromatic hydrocarbons were totally extracted. The refined gas oil obtained can be used to produce clean diesel fuel for the environment.

scholarly journals Study of Photoionization of Solids—Resonance Ionization

1985 ◽  
Vol 5 (5) ◽  
pp. 297-307 ◽  
Author(s):  
F. Verdun ◽  
J. F. Muller ◽  
G. Krier
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Multiphoton Ionization ◽  
Tunable Laser ◽  
Resonance Ionization ◽  
Experimental Conditions ◽  
Ionization Mechanisms ◽  
Polycyclic Aromatic ◽  
Solid Compounds ◽  
Derivatives Of

Multiphoton ionization (MPI) mechanism in the solid state being still controversial we coupled a tunable laser to the LAMMA 500 microprobe to reinvestigate, using different UV irradiations, the ionization of some organic and organometallic solid compounds. Two polycyclic aromatic hydrocarbons (PAH) anthracene and pyrene and metallic derivatives of copper and cadmium were tested. Preliminary results are consistent with thermal desorption of neutral molecules as the first step followed by photoionization in the vapor phase.Thus the ionization mechanisms described for gases or vapors, and in particular some REMPI or RIS processes appear to apply to our experimental conditions.

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