title: Oxidative desulfurization of model diesel via dual activation by a protic ionic liquid.
abstract: A novel and green carboxylate-anion-based protic ionic liquid (PIL), [Hnmp]HCOO, was prepared through a simple and atom economic neutralization reaction between N-methyl-2-pyrrolidonium (NMP) and formic acids. Both FT-IR spectra and (1)H NMR confirmed its simple salt structure. [Hnmp]HCOO exhibited so high catalytic activity that the dibenzothiophene (DBT) removal reached 99% at 50°C in 3h under conditions of VPIL/Vmodel oil=1:10 and H2O2/DBT (O/S, molar ratio)=5. The catalytic oxidation reactivity of S-compounds was found to be in the order of DBT>4,6-dimethyldibenzothiophene (4,6-DMDBT)>benzothiophene (BT). The investigation on mechanism showed that oxidative desulfurization was realized through dual activation of PIL. Moreover, [Hnmp]HCOO can be recycled for five times with an unnoticeable decrease in desulfurization activity.
authors: Green Chemistry Centre, College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, China. Electronic address: hylv@ytu.edu.cn.
authors: Hongying
authors: H
authors: Lü
authors: Green Chemistry Centre, College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, China.
authors: Shunan
authors: S
authors: Wang
authors: Green Chemistry Centre, College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, China.
authors: Changliang
authors: C
authors: Deng
authors: Green Chemistry Centre, College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, China.
authors: Wanzhong
authors: W
authors: Ren
authors: Green Chemistry Centre, College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, China.
authors: Baocun
authors: B
authors: Guo
mesh_terms: D002384:Catalysis; D005561:Formates / Q000737:chemistry; D005742:Gasoline / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry; D010084:Oxidation-Reduction; D011522:Protons; D013455:Sulfur / Q000737:chemistry* / Q000302:isolation & purification; D013696:Temperature; D013876:Thiophenes / Q000737:chemistry
chemical_list: D005561:Formates; D005742:Gasoline; D011522:Protons; D013876:Thiophenes; C030544:formic acid; D013455:Sulfur; D006861:Hydrogen Peroxide; C016366:dibenzothiophene
keywords: DBT; Diesel; Oxidative desulfurization; Protic ionic liquid