Efficient Oxidative Desulfurization Processes Using Polyoxomolybdate Based Catalysts

• DOI: 10.3390/en11071696
• Publication Date: 2018-07-02T14:56:52Z
• Authors: Carlos M. Granadeiro; Pedro M. C. Ferreira; Diana Julião; Luís A. Ribeiro; Rita Valença; Jorge C. Ribeiro; Isabel S. Gonçalves; Baltazar De Castro; Martyn Pillinger; Luís Cunha-Silva; Salete S. Balula
• Keywords: Technology; real diesel; oxidative desulfurization; T; hydrogen peroxide; benzothiophene derivatives; 01 natural sciences; 7. Clean energy; ionic liquid; 0104 chemical sciences; 12. Responsible consumption

This work proposes an efficient desulfurization system to produce low sulfur diesel under sustainable and moderate experimental conditions. Treatment of a real diesel with a sulfur content of 2300 ppm led to 80% desulfurization after 2 h. The processes used conciliate liquid-liquid extraction and sulfur oxidative catalysis. The catalytic performance of the commercial Keggin-polyoxomolybdate H3[PMo12O40] (PMo12) was strategically increased by simple cation exchange, using a long carbon chain (ODAPMo12, ODA = CH3(CH2)17(CH3)3N), and by its incorporation into the Metal-Organic Framework (MOF) NH2-MIL-101(Cr), forming a new active heterogeneous PMo12@MOF composite catalyst. Activity of both catalysts was similar; however, the solid catalyst could be easily recovered and reused, and its stability was confirmed after multiple continuous cycles.