Abstract
Deep eutectic solvent (DES) tetraethyl ammonium bromide-malonic acid (TEAB-Mal) was synthesized and its structure was characterized with FTIR spectroscopy. The denitrogenation performance of the solvent was investigated using model diesel fuel containing quinoline or indole. Experiment results showed that the removal efficiencies of quinoline and indole were 97.7 and 90.1% at temperature of 30 °C, 1:7 (w/w) DES: oil, extraction time of 30 min, respectively. In addition, the quinoline and indole removal efficiencies can still reach 86.4 and 78.9% after four recycles of the DES, respectively.
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