کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5136041 | 1493456 | 2016 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Silver bonded to silica gel applied to the separation of polycyclic aromatic sulfur heterocycles in heavy gas oil Silver bonded to silica gel applied to the separation of polycyclic aromatic sulfur heterocycles in heavy gas oil](/preview/png/5136041.png)
- Ag-MPSG material was characterized and used in LEC to separate PASH of HGO.
- Ag-MPSG is a promising phase to replace Pd-MPSG due to its performance and lower cost.
- Fractionation of HGO with Ag-MPSG followed by GCÂ ÃÂ GC/MS resulted in 168 OSC identified.
- The use of Ag-MPSG resulted in the identification of some OSC not yet reported in HGO.
Silica gel containing silver ions was prepared and characterized. Silica was organofunctionalized with 3-mercaptopropyl group by using grafting reaction followed by silver ions adsorption (silver covalently bonded to mercaptopropyl silca gel, Ag-MPSG). The organofunctionalization and silver coordination were observed by transmission infrared spectroscopy and elemental analyses (CHN and EDS). The textural characteristics were studied by N2 adsorption-desorption isotherms. Additionally, optical properties were studied by diffuse reflectance spectroscopy. The Ag-MPSG material was employed as stationary phase for the first time for fractionation of a heavy gas oil sample resulting in a fraction that is richer in polycyclic aromatic sulfur heterocycles (PASH). The fractions were analyzed by comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometric detector and Ag-MPSG material provided similar fractionation performance when compared to conventional material [palladium covalently bonded to mercaptopropyl silca gel, Pd(II)-MPSG] usually employed for the same purpose and as the cost of silver is less than the one of palladium, the cost of the fractionation phase was reduced.
Journal: Journal of Chromatography A - Volume 1470, 28 October 2016, Pages 104-110