Separation of thiophene from heptane with ionic liquids

Urszula Domańska-Żelazna , Elena Vadimovna Lukoshko , Marek Królikowski


Ionic liquids (ILs) are well known novel green solvents, which can be used for removing sulfur compounds from gasoline and diesel oils. Ternary (liquid + liquid) equilibrium data are presented for mixtures of {ionic liquid (1) + thiophene (2) + heptane (3)} at T = 298.15 K and ambient pressure to analyze the performance of the ionic liquid (IL) in the extraction of thiophene from the alkanes. Three pyrrolidinium-based ionic liquids have been studied: 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate, ([BMPYR][FAP]), 1-butyl-1-methylpyrrolidinium tetracyanoborate, [BMPYR][TCB] and 1-butyl-1-methylpyrrolidinium tricyanomethanide, [BMPYR][TCM]. The results are discussed in terms of the selectivity and distribution ratio of separation of related systems. The immiscibility in the binary liquid systems of (thiophene + heptane) with all used ILs was observed. The [TCM]− anion in comparison with [TCB]− and [FAP]− anions shows much higher selectivity and slightly lower distribution ratio for extraction of thiophene. The non-random two liquid NRTL model was used successfully to correlate the experimental tie-lines and to calculate the phase composition error in mole fraction in the ternary systems. The average root mean square deviation (RMSD) of the phase composition was 0.047. The densities of [BMPYR][TCM] in temperature range from (298.15 to 348.15) K were measured. The data presented here show that the [BMPYR][TCM] ionic liquid can be used as an alternative solvent for the separation of thiophene from the hydrocarbon stream using solvent liquid–liquid extraction at ambient conditions.
Author Urszula Domańska-Żelazna (FC / DPC)
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
, Elena Vadimovna Lukoshko (FC / DPC)
Elena Vadimovna Lukoshko,,
- Department Of Physical Chemistry
, Marek Królikowski (FC / DPC)
Marek Królikowski,,
- Department Of Physical Chemistry
Journal seriesJournal of Chemical Thermodynamics, ISSN 0021-9614
Issue year2013
Publication size in sheets0.5
Keywords in EnglishIonic liquids, 1-Butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate, 1-Butyl-1-methylpyrrolidinium tetracyanoborate, 1-Butyl-1-methylpyrrolidinium tricyanomethanide, Ternary (liquid–liquid) phase diagrams, Selectivity, Distribution ratio, Correlation
ASJC Classification1606 Physical and Theoretical Chemistry; 2500 General Materials Science; 3107 Atomic and Molecular Physics, and Optics
Languageen angielski
4-s2.0-S0021961413000621-main.pdf 457.44 KB
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 30.0, 01-02-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 01-02-2020, ArticleFromJournal
Publication indicators Scopus Citations = 75; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.234; WoS Impact Factor: 2013 = 2.423 (2) - 2013=2.399 (5)
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