Separation of thiophene, or benzothiophene from model fuel using glycols. Liquid–liquid phase equilibria and oxidative desulfurization study

Marek Królikowski , Aleksandra Lipińska

Abstract

In this work the possibility of use glycols in extractive desulfurization will be discussed based on liquid–liquid phase equilibria (LLE) measurements for {glycol (1) + aromatic sulfur compound (2) + heptane (3)} ternary systems at T = 308.15 K and at pressure p = 0.1 MPa. Based on the experimental data, the performance of three glycols: diethylene glycol, triethylene glycol and polyethylene glycol (PEG 200) in the extraction of thiophene, or benzothiophene from heptane were determined. The selectivity, , and solute distribution ratio, derived from the experimental equilibrium data, were calculated and used to determine the efficiency of the tested glycols as a solvent for the extraction of sulfur compounds from model fuels. The NRTL equation was successfully used to correlate the experimental tie-lines and calculate the phase composition error in mole fraction in the ternary systems. The average root mean square deviation (RMSD) of the phase composition was less than 0.017. Additionally, the extractive desulfurization (EDS) of model fuels has been studied using diethylene glycol, triethylene glycol, polyethylene glycols (PEG 200), [BMIM][BF4] and eutectic mixtures of ([BMMOR][Br with diethylene glycol, or triethylene glycol). The oxidative extractions (ODS) were performed using different oxidative agents: the mixture of hydrogen peroxide with acetic acid, or formic acid, or benzoic acid, or iron (III) chloride and vanadium (V) oxide as well as the mixture of oxygen with N-hydroxyphthalimide (NHPI). Many parameters including the type of extractant and oxidizing agents, extraction time and temperature, as well as the ratio of the volume of model fuel to the volume of the extractant and number of extraction cycles on the extraction efficiency, were considered and discussed.
Author Marek Królikowski (FC / DPC)
Marek Królikowski,,
- Department Of Physical Chemistry
, Aleksandra Lipińska (FC / DPC)
Aleksandra Lipińska,,
- Department Of Physical Chemistry
Journal seriesFluid Phase Equilibria, ISSN 0378-3812, (A 30 pkt)
Issue year2019
Vol482
Pages11-23
Publication size in sheets0.6
Keywords in EnglishTernary systemDesulfurizationLLE dataExtractionGlycolOxidizing agent
ASJC Classification1606 Physical and Theoretical Chemistry; 3100 General Physics and Astronomy; 1500 General Chemical Engineering
DOIDOI:10.1016/j.fluid.2018.10.017
URL https://www.sciencedirect.com/science/article/pii/S0378381218304394
Languageen angielski
File
1-s2.0-S0378381218304394-main.pdf 2.07 MB
Score (nominal)30
ScoreMinisterial score = 30.0, 30-04-2019, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 11-03-2019, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.033; WoS Impact Factor: 2017 = 2.197 (2) - 2017=2.214 (5)
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