Details

Autor(en) / Beteiligte

• Zhao, Xiuxiu
• Zhu, Guoqiang
• Jiao, Lingying
• Yu, Fengli
• Xie, Congxia

Titel

Formation and Extractive Desulfurization Mechanisms of Aromatic Acid Based Deep Eutectic Solvents: An Experimental and Theoretical Study

Ist Teil von

• Chemistry : a European journal, 2018-08, Vol.24 (43), p.11021-11032

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2018

Quelle

Wiley Online Library

Beschreibungen/Notizen

• The formation and extractive desulfurization (EDS) mechanisms of aromatic acid based deep eutectic solvents (DESs) were studied experimentally and through quantum chemistry calculations. Hydrogen bonding and van der Waals forces were investigated as the driving forces for the formation of aromatic acid based DESs by means of 1H NMR and FTIR spectroscopy, and DFT calculations. The driving forces of EDS were also studied. The results showed that van der Waals forces and other weak interactions were the main diving forces for EDS, and the structures of the aromatic acid based DESs did not change after EDS. The interaction energy between the aromatic acid based DESs and thiophene (TH), benzothiophene (BT), and dibenzothiophene (DBT) were calculated by DFT to understand the EDS order: TH<BT<DBT. Moreover, the optimal EDS conditions were studied. The amount of BT (500 ppm) was reduced to below 10 ppm under the optimal conditions of using triethylamine/o‐hydroxybenzoic acid ([TEA]/[OHBA]). The desulfurization efficiency of [TEA]/[OHBA] was stable after ten cycles, and the mechanical loss of [TEA]/[OHBA] could be ignored. The forces that bind: The formation and extractive desulfurization mechanisms of aromatic acid based deep eutectic solvents (DESs; see figure) have been studied through experimental and theoretical methods. Hydrogen bonding and van der Waals forces have been investigated as the driving forces for the formation of these DESs