Abstract

In the present study, different metals included Ni and Cu were separately loaded on the mixed matrix of Al₂O₃-TiO₂ to be used in catalytic-oxidative-adsorptive desulfurization of liquid hydrocarbon model fuel. The prepared catalysts were characterized by X-ray diffraction (XRD), N₂ adsorption–desorption and field emission scanning electron microscopy (FE-SEM). The effects of different important parameters on catalytic-adsorptive desulfurization in the presence of hydrogen peroxide including sulfur/catalyst ratio (mg g⁻¹) in the range of 4–12, oxidant/sulfur molar ratio (mol mol⁻¹) of 4–10, temperature in the range of 30 °C–70 °C, and reaction time of 30–90 min. for the model fuel of n-decane with 800 ppm dibenzothiophene were investigated. Response surface methodology was used to design of experiments and explore the synergistic effects of investigated parameters. The results showed that Ni/Al₂O₃-TiO₂ has higher sulfur removal efficiency than Cu/Al₂O₃-TiO₂. Maximum efficiency (83.9%) was achieved when Ni/Al₂O₃-TiO₂ was used at the conditions included sulfur to catalyst ratio = 4 mg g⁻¹, oxidant to sulfur molar ratio = 10 mol mol⁻¹, temperature = 70 °C, and the reaction time = 90 min. It was found that the efficiency of desulfurization for catalysts was increased with decreasing of the sulfur to catalyst ratio and increased when oxidant to sulfur molar ratio, temperature and reaction time increased.

Graphic abstract

中文翻译：

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催化氧化吸附法强化液态烃燃料脱硫工艺

摘要

在本研究中，将包括Ni和Cu在内的不同金属分别负载在Al ₂ O ₃ -TiO ₂的混合基质上，以用于液态烃模型燃料的催化氧化-吸附脱硫。通过X射线衍射（XRD），N ₂吸附-脱附和场发射扫描电子显微镜（FE-SEM）对制备的催化剂进行了表征。在过氧化氢存在下，不同重要参数对催化吸附脱硫的影响，其中硫/催化剂比（mg g ^-1）在4-12范围内，氧化剂/硫摩尔比（mol mol ^-1））的温度范围为4-10，温度范围为30°C-70°C，反应时间为30-90分钟。对正癸烷与800 ppm二苯并噻吩的模型燃料的合成进行了研究。响应面方法用于设计实验并探索所研究参数的协同效应。结果表明，Ni / Al ₂ O ₃ -TiO _2的脱硫效率高于Cu / Al ₂ O ₃ -TiO ₂。当在以下条件下使用Ni / Al ₂ O ₃ -TiO ₂时，达到最大效率（83.9％）：硫与催化剂的比例= 4 mg g ^-1，氧化剂与硫的摩尔比= 10 mol mol ^-1，温度＝ 70℃，反应时间＝ 90分钟。发现随着硫/催化剂比的降低，催化剂的脱硫效率增加，而当氧化剂/硫的摩尔比，温度和反应时间增加时，催化剂的脱硫效率增加。

图形摘要