Synthesis and Characterization of Methylsulfonium Salt in Diesel Fraction Using Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
10.3724/SP.J.1096.2010.00413
- VernacularTitle:直馏柴油中硫化物甲基锍盐合成及电喷雾-高分辨质谱分析
- Author:
Na PAN
;
Quan SHI
;
Chunming XU
;
Peng LIU
;
Yahe ZHANG
;
Junhui HE
;
Suoqi ZHAO
- Publication Type:Journal Article
- Keywords:
Diesel;
Sulfur compounds;
Methylsulfonium;
Electrospray ionization;
Fourier transform-ion cyclotron resonance;
Mass spectrometry
- From:
Chinese Journal of Analytical Chemistry
2010;38(3):413-416
- CountryChina
- Language:Chinese
-
Abstract:
Sulfur compounds in the diesel were selectively derived into methylsulfonium salts by reacting with iodomethane in the presence of silver tetrafluoroborate, and characterized by positive-ion electrospray ionization (ESI) fourier transform ion cyclotron resonance (FT-ICR MS). The conversion ratios and react selectivities of the methylation for various sulfur compounds were investigated by gas chromatograph coupled with pulse flame photometric detector (GC-PFPD). Result shows that the sulfur compounds in the diesel can react with iodomethane easily at room temperature, the most of sulfur compound derived into methylsulfonium salts;the homologue of benzothiophene get the higher conversion ratio and react selectivity than the homologue of dibenzothiophene (DBT). It is found that primarily sterically hindered alkylated DBT, for example, 4- or 4-, 6- DBT, is recalcitrant to be methylated. Other than benzothiophenes and dibenzothiophenes, one- and two-ring sulfides, as well as other sulfur compounds with a double bond equivalent (DBE) value ranged from 1 to 12 are identified in the diesel.
