Feasibility of phosphonium-based ionic liquids as solvents for extractive desulfurization of liquid fuels

Omar U. Ahmed; Farouq S. Mjalli; Ashish M. Gujarathi; Talal Al-Wahaibi; Yahya Al-Wahaibi; Inas M. AlNashef

doi:10.1016/j.fluid.2015.05.015

Feasibility of phosphonium-based ionic liquids as solvents for extractive desulfurization of liquid fuels

Omar U. Ahmed, Farouq S. Mjalli, Ashish M. Gujarathi, Talal Al-Wahaibi, Yahya Al-Wahaibi, Inas M. AlNashef

Chemical and Petroleum Engineering

Sultane Qaboos University

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Binary solid-liquid equilibria for phosphonium based ionic liquids with dibenzothiophene (DBT) were measured within the temperature range of 303.15-353.15K. The influence of temperature and ionic liquid structure on solubility of dibenzothiophene is presented. The solubility of DBT in all tested ionic liquids increased with temperature and as high as 52.93wt% DBT in solution was obtained at 353.15K. At this temperature, the solubility of DBT in ILs based on the trihexyl(tetradecyl)phosphonium cation depends on the anion of the IL. This dependency was found to be in the order; Cl^->Br^-≈N(CN)₂^->[NTf₂]^-> bis(2,4,4-trimethylpentyl)phosphinate. The experimental solubility data was satisfactorily correlated using NRTL thermodynamic model. Finally, more than 99% (DBT) and 96% (thiophene) sulfur removal were achieved after 4th and 5th extraction stages respectively using the triisobutyl(methyl) phosphonium tosylate ionic liquid under mild operating conditions.

Original language	British English
Pages (from-to)	102-109
Number of pages	8
Journal	Fluid Phase Equilibria
Volume	401
DOIs	https://doi.org/10.1016/j.fluid.2015.05.015
State	Published - 5 Sep 2015

Keywords

Dibenzothiophene
Ionic liquids
NRTL
Phosphonium
Solubility
Thiophene

Access to Document

10.1016/j.fluid.2015.05.015

Cite this

@article{629643b6be2b42ce96e3c452c9004495,

title = "Feasibility of phosphonium-based ionic liquids as solvents for extractive desulfurization of liquid fuels",

abstract = "Binary solid-liquid equilibria for phosphonium based ionic liquids with dibenzothiophene (DBT) were measured within the temperature range of 303.15-353.15K. The influence of temperature and ionic liquid structure on solubility of dibenzothiophene is presented. The solubility of DBT in all tested ionic liquids increased with temperature and as high as 52.93wt% DBT in solution was obtained at 353.15K. At this temperature, the solubility of DBT in ILs based on the trihexyl(tetradecyl)phosphonium cation depends on the anion of the IL. This dependency was found to be in the order; Cl->Br-≈N(CN)2->[NTf2]-> bis(2,4,4-trimethylpentyl)phosphinate. The experimental solubility data was satisfactorily correlated using NRTL thermodynamic model. Finally, more than 99% (DBT) and 96% (thiophene) sulfur removal were achieved after 4th and 5th extraction stages respectively using the triisobutyl(methyl) phosphonium tosylate ionic liquid under mild operating conditions.",

keywords = "Dibenzothiophene, Ionic liquids, NRTL, Phosphonium, Solubility, Thiophene",

author = "Ahmed, {Omar U.} and Mjalli, {Farouq S.} and Gujarathi, {Ashish M.} and Talal Al-Wahaibi and Yahya Al-Wahaibi and AlNashef, {Inas M.}",

note = "Funding Information: The authors appreciate the financial support of The Research Council and Sultan Qaboos University, Muscat Oman , under the project RC/ENG/PCED/12/02. Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2015",

month = sep,

day = "5",

doi = "10.1016/j.fluid.2015.05.015",

language = "British English",

volume = "401",

pages = "102--109",

journal = "Fluid Phase Equilibria",

issn = "0378-3812",

publisher = "Elsevier",

}

TY - JOUR

T1 - Feasibility of phosphonium-based ionic liquids as solvents for extractive desulfurization of liquid fuels

AU - Ahmed, Omar U.

AU - Mjalli, Farouq S.

AU - Gujarathi, Ashish M.

AU - Al-Wahaibi, Talal

AU - Al-Wahaibi, Yahya

AU - AlNashef, Inas M.

N1 - Funding Information: The authors appreciate the financial support of The Research Council and Sultan Qaboos University, Muscat Oman , under the project RC/ENG/PCED/12/02. Publisher Copyright: © 2015 Elsevier B.V.

PY - 2015/9/5

Y1 - 2015/9/5

N2 - Binary solid-liquid equilibria for phosphonium based ionic liquids with dibenzothiophene (DBT) were measured within the temperature range of 303.15-353.15K. The influence of temperature and ionic liquid structure on solubility of dibenzothiophene is presented. The solubility of DBT in all tested ionic liquids increased with temperature and as high as 52.93wt% DBT in solution was obtained at 353.15K. At this temperature, the solubility of DBT in ILs based on the trihexyl(tetradecyl)phosphonium cation depends on the anion of the IL. This dependency was found to be in the order; Cl->Br-≈N(CN)2->[NTf2]-> bis(2,4,4-trimethylpentyl)phosphinate. The experimental solubility data was satisfactorily correlated using NRTL thermodynamic model. Finally, more than 99% (DBT) and 96% (thiophene) sulfur removal were achieved after 4th and 5th extraction stages respectively using the triisobutyl(methyl) phosphonium tosylate ionic liquid under mild operating conditions.

AB - Binary solid-liquid equilibria for phosphonium based ionic liquids with dibenzothiophene (DBT) were measured within the temperature range of 303.15-353.15K. The influence of temperature and ionic liquid structure on solubility of dibenzothiophene is presented. The solubility of DBT in all tested ionic liquids increased with temperature and as high as 52.93wt% DBT in solution was obtained at 353.15K. At this temperature, the solubility of DBT in ILs based on the trihexyl(tetradecyl)phosphonium cation depends on the anion of the IL. This dependency was found to be in the order; Cl->Br-≈N(CN)2->[NTf2]-> bis(2,4,4-trimethylpentyl)phosphinate. The experimental solubility data was satisfactorily correlated using NRTL thermodynamic model. Finally, more than 99% (DBT) and 96% (thiophene) sulfur removal were achieved after 4th and 5th extraction stages respectively using the triisobutyl(methyl) phosphonium tosylate ionic liquid under mild operating conditions.

KW - Dibenzothiophene

KW - Ionic liquids

KW - NRTL

KW - Phosphonium

KW - Solubility

KW - Thiophene

UR - http://www.scopus.com/inward/record.url?scp=84929627068&partnerID=8YFLogxK

U2 - 10.1016/j.fluid.2015.05.015

DO - 10.1016/j.fluid.2015.05.015

M3 - Article

AN - SCOPUS:84929627068

SN - 0378-3812

VL - 401

SP - 102

EP - 109

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

ER -

Feasibility of phosphonium-based ionic liquids as solvents for extractive desulfurization of liquid fuels

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this