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- W4313856661 abstract "Fabrication of adsorbent can play an important role in the adsorption desulfurization technology as a most promising deeply desulfurization technology. Ag2O/CeO2/SiO2 aerogel composites were synthesized, where the easy oxidation of Ce3+ into Ce4+ was realized by adding hydrogen peroxide, and were utilized to remove thiophenics from model fuels and aromatics. Compared with Ag2O/SiO2 and CeO2/SiO2, the adsorption uptake and solvent washing regeneration performance of Ag2O/CeO2/SiO2 for thiophene was obviously enhanced, and the adsorption selectivity for thiophene in the presence of aromatics was relatively close to CeO2/SiO2, attributed to that Ag2O/CeO2/SiO2 adsorbed thiophenics via the π-Ag+ complexation and S-Ce bonding, where the latter was main interaction. However, there was no synergistic interaction between Ag and Ce species acted as adsorption sites in the Ag2O/CeO2/SiO2, which could be supported by that the chemical state of Ag and Ce in Ag2O/CeO2/SiO2 was consistent with corresponding one in Ag2O/SiO2 and CeO2/SiO2, respectively. Among Ag2O/CeO2/SiO2 aerogel composites with different molar ratios of Si/Ce, Ag2O/CeO2/SiO2-50 performed the best, its adsorption uptake for thiophene, benzothiophene and dibenzothiophene from model fuels arrived at 20.4, 21.8 and 27.2 mg-S/gads, respectively. Langmuir and Freundlich adsorption isotherm models, the pseudo-second-order kinetic model could well describe the adsorption of thiophenics over Ag2O/CeO2/SiO2-50." @default.
- W4313856661 created "2023-01-10" @default.
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- W4313856661 date "2023-03-01" @default.
- W4313856661 modified "2023-10-16" @default.
- W4313856661 title "Enhanced performance of adsorptive removal of thiophenic compounds from model fuels and aromatics over Ag and Ce doped SiO2 aerogel composites" @default.
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- W4313856661 doi "https://doi.org/10.1016/j.cherd.2023.01.007" @default.
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