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Oxidative desulfurization of model oil and oil cuts with MoO 3 /SBA-15: experimental design and optimization by Box–Behnken method
Reaction Kinetics, Mechanisms and Catalysis ( IF 1.8 ) Pub Date : 2020-09-17 , DOI: 10.1007/s11144-020-01852-2
Fatemeh Bibak , Gholamreza Moradi

Using wet impregnation method, MoO3 particles were loaded on hierarchical silica support, SBA-15, and applied for oxidative desulfurization (ODS) process from a model oil containing dibenzothiophene (DBT). The experiments were carried out by the use of H2O2 and acetonitrile as oxidant and extractant. The MoO3/SBA-15 catalyst was characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX), field emission scanning electron microscope (FE-SEM) and Brunauer–Emmett–Teller (BET) analyses. At first, the effect of molybdenum loading was examined. Then, the effect of operating parameters on ODS including temperature, catalyst dosage, the molar ratio of H2O2/DBT and reaction time were investigated using Box–Behnken experimental design. The complete efficiency, ~ 100% S removal, was achieved by 0.004 g mL1 catalyst at 55 ºC within 49 min reaction time and H2O2/DBT = 9. At the optimized operating conditions, real oil cuts of gasoline and gas oil were tested and the S removal efficiency of 69.73% and 49% was achieved. The desulfurization activity of the catalyst from DBT model oil after 5 times regeneration was above 93%.



中文翻译:

MoO 3 / SBA-15对模型油和油馏分进行氧化脱硫:Box-Behnken方法的实验设计和优化

使用湿浸渍法,将MoO 3颗粒负载在分级二氧化硅载体SBA-15上,并从含二苯并噻吩(DBT)的模型油中进行氧化脱硫(ODS)工艺。通过使用H 2 O 2和乙腈作为氧化剂和萃取剂进行实验。MoO 3 / SBA-15催化剂通过粉末X射线衍射(XRD),傅立叶变换红外光谱(FTIR),能量色散X射线光谱(EDX),场发射扫描电子显微镜(FE-SEM)和Brunauer进行表征–Emmett-Teller(BET)分析。首先,研究了钼负载的影响。然后,操作参数对ODS的影响包括温度,催化剂用量,H的摩尔比使用Box–Behnken实验设计研究了2 O 2 / DBT和反应时间。完整的效率,〜100%S的去除,是通过实现0.004克毫升- 1催化剂在55ºC内49分钟的反应时间和H 2 ö 2 / DBT = 9.在优化操作条件下,汽油和气体的实际油馏分对油进行了测试,脱硫效率分别为69.73%和49%。5次再生后,DBT模型油催化剂的脱硫活性高于93%。

更新日期:2020-09-18
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