Citation:
WANG Xiao-jing, LIU Chao, DONG Yue, LI Fa-tang, ZHAO Jun, LI Yu-pei. Modification of activated carbon with tetrafluoroboric acid and its performance in adsorption desulfurization of dibenzothiophene[J]. Journal of Fuel Chemistry and Technology,
;2015, 43(5): 607-613.
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The activated carbon adsorbent was modified with tetrafluoroboric acid (HBF4) by impregnation and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and N2 physisorption. The performance of modified activated carbon in adsorption desulfurization of dibenzothiophene (DBT) in model diesel fuel was investigated and the influences of HBF4 concentration, calcination temperature and the initial DBT concentration on the sulfur removal efficiency were considered. The results show that the adsorbent modified with 0.5% HBF4 solution and calcined at 140 ℃ performs best in DBT desulfurization; when the adsorbent/oil ratio is 1:100, the HBF4-modified adsorbent exhibits an adsorption capacity of 352 mg/g, which is 72.5% higher than that of the unmodified activated carbon.
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