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Oxidative desulfurization of refinery diesel pool fractions using LaVO4 photocatalyst
Journal of Industrial and Engineering Chemistry ( IF 6.1 ) Pub Date : 2021-03-31 , DOI: 10.1016/j.jiec.2021.03.040
Iqrash Shafiq , Murid Hussain , Sumeer Shafique , Ruhma Rashid , Parveen Akhter , Ashfaq Ahmed , Jong-Ki Jeon , Young-Kwon Park

Oxidative desulfurization (ODS) is a swiftly rising organosulfur compounds eradicating system, effective enough at a mild temperature and pressure, overwhelming the necessity of costly hydrogen in the traditional HDS systems. In this study, pure LaVO4 photocatalyst was prepared using the hydrothermal approach and employed for deep oxidative desulfurization application in the aerobic environment under visible-light irradiations. The as-prepared photocatalyst semiconductor material was characterized by FTIR, SEM, UV–vis DRS and Raman analyses. The examined photocatalyst presented a narrow bandgap, a small particle size, high photo-responsive monoclinic phase, high light photons capturability, plenteous active sites accessibility and reduced recombination of photogenerated charge carriers, ensuing a good visible-light-driven deep oxidative desulfurization ability. The photocatalytic material was tested for its performance over different petroleum refinery diesel pool fraction streams including hydrodesulfurization unit diesel rundown, mild hydrocracking unit rundown gas oil, heavy kerosene oil and the ultimate diesel oil blend, containing organosulfur compounds ranging from disulfides to the stringent organosulfur compounds, with the quantity lying between 57 and 863 ppm. The kinetic study was found in agreement with the pseudo-first-order kinetics. The conceivable desulfurization mechanism was also anticipated. Moreover, the recyclability of the photocatalytic material was also discussed.



中文翻译:

使用LaVO 4光催化剂对炼油厂柴油池馏分进行氧化脱硫

氧化脱硫(ODS)是一种迅速崛起的有机硫化合物根除系统,在温和的温度和压力下有效,足以消除传统HDS系统中昂贵的氢气的必要性。在这项研究中,纯LaVO 4使用水热法制备光催化剂,并在可见光照射下在好氧环境中用于深度氧化脱硫。通过FTIR,SEM,UV-vis DRS和拉曼分析对制备的光催化剂半导体材料进行了表征。所检查的光催化剂呈现出窄带隙,小粒径,高光响应性单斜晶相,高光子俘获性,丰富的活性位点可及性以及光生电荷载流子的重组减少,从而确保了良好的可见光驱动的深度氧化脱硫能力。测试了该光催化材料在不同炼油厂柴油池馏分流中的性能,包括加氢脱硫装置柴油残渣,轻度加氢裂化装置残渣瓦斯油, ppm。发现动力学研究与拟一级动力学一致。还可以想到可能的脱硫机理。此外,还讨论了光催化材料的可回收性。

更新日期:2021-04-26
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