کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6630932 | 1424938 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
H2O2-assisted hydrothermal synthesis of TiO2-SiO2 and its enhanced photocatalytic-adsorptive desulfurization performance for model fuel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Photocatalytic-adsorptive desulfurization of model fuel by the H2O2-assisted synthesized TiO2-SiO2 (TiO2-SiO2-H) was investigated using air as the oxidant under UV irradiation. TiO2-SiO2-H was synthesized hydrothermally in the presence of H2O2 and characterized by scanning electron microscopy (SEM), N2 adsorption, X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and photoluminescence spectrum (PL). Compared to TiO2-SiO2 synthesized in the absence of H2O2, Ti0.25SiOy-H showed greatly enhanced photocatalytic-adsorptive desulfurization performance due to its increased surface area, greatly increased UV absorption and decreased recombination of photogenerated hole/electron pairs. The Ti/Si molar ratio was optimized to 0.3 with the sulfur removal of 100% after reaction for 1â¯h at the fuel-to-Ti0.3SiOy-H weight ratio of 20, and the sulfur content could still be reduced to be <1â¯ppmw when the fuel-to-Ti0.3SiOy-H weight ratio was increased to 80. Moreover, TiO2-SiO2-H based photocatalytic-adsorptive process bears high selectivity for removing organosulfur in the toluene-containing fuel. The sulfur removal for model fuel containing 25â¯wt% toluene could reach 98.4% after reaction for 5â¯h. The photocatalytic-adsorptive selectivity of Ti0.3SiOy-H for organosulfur compounds in model diesel fuels followed the order of dibenzothiopheneâ¯>â¯4,6-dimethyldibenzothiopheneâ¯>â¯benzothiophene. The desulfurization performance of TiO2-SiO2-H was basically stable after four consecutive desulfurization-regeneration cycles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 226, 15 August 2018, Pages 527-535
Journal: Fuel - Volume 226, 15 August 2018, Pages 527-535
نویسندگان
Xin Li, Yilin Xu, Chen Zhang, Hong Wang, Yongji Song, Wei Zhang, Cuiqing Li,