Incorporating carbon quantum dots into phosphotungstic acid ionic liquid materials for enhanced catalytic oxidative desulfurization

Xiong, Jun; Huang, Haoxue; Zhang, Mei; Song, Pin; Li, Hongping; Di, Jun

doi:10.1016/j.fuel.2024.131168

Cited by 6 publications

(1 citation statement)

References 38 publications

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“…Jangi et al [5] supported phosphotungstic acid on natural zeolites-clinoptilolite, mordenite, ferrierite, and natrolite-and found that PTA-Ferr exhibited the highest catalytic activity, removing 82.02% of DBT. Xiong et al [6] formulated phosphotungstic acid ionic liquid materials by dissolving it in octadecyl dimethyl ammonium chloride (OTAC), showing exceptional catalytic performance in the treatment of DBT, 4-MDBT, and 4,6-DMDBT. After 60 min, the desulfurization rates of the three sulfur-containing organic compounds were all close to 100%.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Desulfurization Process via Choline Phosphotungstate Coupled with Persulfate Using Response Surface Methodology

Zhang,

2024

Catalysts

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Using a simple acid-base neutralization method, a Ch-PW solid catalyst was synthesized by mixing choline hydroxide (ChOH) and phosphotungstic acid (HPW) at a 2:1 molar ratio in an aqueous solution. This catalyst was combined with a 20 wt.% potassium peroxymonosulfate (PMS) solution, using acetonitrile (ACN) as the extraction solvent to create an extraction catalytic oxidative desulfurization system. The optimal desulfurization conditions were determined through response surface methodology, targeting the highest desulfurization rate: 0.99 g of Ch-PW, 1.07 g of PMS, 2.5 g of extraction solvent, at a temperature of 50.48 °C. The predicted desulfurization rate was 90.79%, compared to an experimental rate of 93.64%, with a deviation of 3.04%. A quadratic model correlating the desulfurization rate with the four conditions was developed and validated using ANOVA, which also quantified the impact of each factor on the desulfurization rate: PMS > ACN > Ch-PW > temperature. GC-MS analysis identified the main oxidation product as DBTO2, and the mechanism of desulfurization in this system was further explored.

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Section: Introductionmentioning

confidence: 99%