Extractive desulfurisation of gasoline with tetrabutyl ammonium chloride-based deep eutectic solvents

ABSTRACT

In this study, three tetrabutyl ammonium chloride (TBAC)-based deep eutectic solvents (DESs) were synthesised and used for desulfurising model and real gasolines. Extraction efficiencies of different DESs followed the order of TBAC/ethylene glycol > TBAC/glycerol > TBAC/malonic acid. After five extraction cycles, the extraction efficiencies of TBAC/ethylene glycol, TBAC/glycerol and TBAC/malonic acid reached 99.5, 99.3 and 99.2%, respectively. Additionally, the structures of original and recycled DESs were analysed and the results showed that DESs maintained their original structures after regeneration. Finally, the desulfurisation performance of DESs for real gasoline was also investigated. This work will provide new green extractants for gasoline desulfurisation.

KEYWORDS:

• Extractive desulfurisation
• gasoline
• deep eutectic solvent
• tetrabutyl ammonium chloride

Funding

This work was financially supported by the National Natural Science Foundation of China (No. 21377083).

Additional information

Funding

This work was financially supported by the National Natural Science Foundation of China (No. 21377083).