Heteropolyanion-Based Ionic Liquid for Deep Desulfurization of Fuels in Ionic Liquids

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• 作者：Wangli Huang ; Wenshuai Zhu ; Huaming Li ; Hua Shi ; Guopeng Zhu ; Hui Liu ; Guangying Chen
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2010
• 出版时间：October 6, 2010
• 年：2010
• 卷：49
• 期：19
• 页码：8998-9003
• 全文大小：280K
• 年卷期：v.49,no.19(October 6, 2010)
• ISSN：1520-5045

文摘

A heteropolyanion-based ionic liquid, [(3-sulfonic acid) propylpyridine]₃PW₁₂O₄₀·2H₂O, [PSPy]₃PW₁₂O₄₀·2H₂O, abbreviated [PSPy]₃PW, was synthesized and approved as an effective catalyst for desulfurization of fuels in [omim]PF₆ by using aqueous H₂O₂ as oxidant. The catalysis was fulfilled with advantages of high activity, simplified workup, and flexible recyclability. The catalytic oxidation reactivity of sulfur-containing compounds was in the order dibenzothiophene (DBT) > 4,6-dimethyldibenzothiophene (4,6-DMDBT) > benzothiophene (BT). The effects of the amount of [PSPy]₃PW, H₂O₂, and reaction time and temperature were investigated in detail. Under the optimal conditions, the removal of DBT achieved 99.4%. Especially, we found that the removal of 4,6-DMDBT could be up to 98.8%, and the system could be recycled at least 9 times without significant decrease in activity. The sulfur level of FCC gasoline could be reduced from 360 to 70 ppm in the extraction and catalytic oxidation system.