Trifluoromethanesulfonic acid-based DESs as extractants and catalysts for removal of DBT from model oil. Issue 21 (23rd February 2017)

• Record Type: Journal Article
• Authors: Mao, Chunfeng; Zhao, Rongxiang; Li, Xiuping; Gao, Xiaohan
• Is Part Of: RSC advances. Volume 7:Issue 21(2017)
• Page Start: 12805
• Page End: 12811
• Publication Date: 2017-02-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra28448e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The ChCl·1.5CF3 O3 S DESs is synthesized by stirring at the room temperature. The high efficient desulfurizative system using ChCl·1.5CF3 O3 S DESs as extractant and catalyst, H2 O2 as oxidant with small amount of H2 O2 (an O/S molar ratio of 6) and the low temperature (40 °C). Abstract : A series of deep eutectic solvents (DESs) of ChCl/ X CF3 SO3 H ( X from 1.0 to 2.0) were synthesized by stirring a mixture of choline chloride (ChCl) and trifluoromethanesulfonic acid (CF3 SO3 H) at room temperature. The DESs were characterized by Fourier transform infrared (FT-IR) and 1 H nuclear magnetic resonance ( 1 H NMR). The oxidative desulfurization of model oil was investigated using ChCl/1.5CF3 SO3 H as a catalyst and extraction agent, and H2 O2 as the oxidant. Some reaction parameters such as type of DES, molar ratio of CF3 SO3 H and ChCl in DESs, H2 O2 dose, reaction temperature, DES dose and type of sulfur compound were investigated. Under the optimum conditions, the removal rate of dibenzothiophene (DBT) and 4, 6-dimethyldibenzothiophene (4, 6-DMDBT) can reach up to 98.65% and 96.8%, respectively. After five recycling runs, the removal rate of DBT can still reach 97.16%.