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Physical Chemistry Research، جلد ۹، شماره ۴، صفحات ۶۳۷-۶۴۹
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عنوان انگلیسی Modified Mesoporous HMS Supported V/W for Oxidative Desulfurization of Dibenzothiophene
چکیده انگلیسی مقاله Two V/W-HMS (hexagonal mesoporous silica) nanostructures were synthesized with various vanadium and tungsten loadings. And their catalytic activities were investigated in oxidative desulphurization of dibenzothiophene (DBT) in model diesel fuel. The catalysts were characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and N_2 physical adsorption-desorption (BET/BJH) techniques. The best V/W-HMS catalyst exhibited high catalytic activity, capable of converting more than 95% of DBT in the model diesel fuel under the optimum reaction condition (0.05 gr 1:4 of catalyst, T=60°C, t=2h). After doping of vanadium with tungsten, it was found that bandgap of the catalyst was reduced and its catalytic performance was improved effectively. The catalytic activity remained unchanged even after 6 recycling processes. The reaction kinetics, mechanism, and bandgap energy of the catalysts were also investigated.
کلیدواژه‌های انگلیسی مقاله Catalyst,Hexagonal mesoporous silica,Vanadium,Tungsten,DBT
نویسندگان مقاله Neda Jamali |
Department of Chemistry, Amirkabir University of Technology, 15875-4413, Tehran, Iran

Nima Ramezani |
Department of Chemistry, Amirkabir University of Technology, 15875-4413, Tehran, Iran

Mohammad Hassan Mousazadeh |
Department of Chemistry, Amirkabir University of Technology, 15875-4413, Tehran, Iran

نشانی اینترنتی https://www.physchemres.org/article_134161_ea2640679b8c47f28f3c16e20edb834c.pdf
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