dc.contributor.author | Butt, Hussain Shakeel | |
dc.contributor.author | Chellappan, Lethesh Kallidanthiyil | |
dc.contributor.author | Fiksdahl, Anne | |
dc.date.accessioned | 2021-02-12T12:37:26Z | |
dc.date.available | 2021-02-12T12:37:26Z | |
dc.date.created | 2021-01-06T11:56:19Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 1383-5866 | |
dc.identifier.uri | https://hdl.handle.net/11250/2727769 | |
dc.description.abstract | A series of 36 dual functionalized N-(poly)ethylen glycol N-allyl-/N-benzyl imidazolium and benzimidazolium ILs were synthesized for extractive desulfurization studies (EDS). The novel ILs were readily prepared from imidazole by a three-step dialkylation and anion exchange procedure and characterised (1H, 13C, 19F NMR; IR; HRMS positive/negative mode). The desulfurization studies were performed on a model oil with dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) in n-dodecane. The N-allyl benzimidazolium based ILs exhibited higher extraction efficiency than corresponding imidazolium-based ILs (69 vs 59% DBT; 52 vs 29% 4,6-DMDBT). The EDS efficiency of the prepared ILs varied with the N-ethylen glycol chains length and by N-allyl or N-benzyl substitution on the imidazolium ILs. The results indicated that desulfurization efficiency is mainly affected by variation of the IL cation, as the IL anions (NTf2; N(CN)2-, SCN-, BF4-) only had minor impact on the extraction capacity of sulfur compounds.
1H NMR studies of IL-DBT solutions illustrated different EDS mechanisms, and specific interactions could explain the higher desulfurization capacity of dual functionalized benzimidazolium than the corresponding imidazolium ILs. 1H NMR confirmed that stronger π-π interactions between the planar aromatic electron system of benzimidazolium ILs and aromatic dibenzothiophenes play a major role for the high EDS extraction efficiency. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Fuel oil desulfurization with dual functionalized imidazolium based ionic liquids | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.volume | 248 | en_US |
dc.source.journal | Separation and Purification Technology | en_US |
dc.identifier.doi | 10.1016/j.seppur.2020.116959 | |
dc.identifier.cristin | 1866221 | |
dc.description.localcode | © 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/). | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |