Efficient Oxidative Desulfurization Processes Using Polyoxomolybdate Based Catalysts

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 H 3 [PMo 12 O 40 ] (PMo 12 ) was strategically increased by simple cation exchange, using a long carbon chain (ODAPMo 12 , ODA = CH 3 (CH 2 ) 17 (CH 3 ) 3 N), and by its incorporation into the Metal-Organic Framework (MOF) NH 2 -MIL-101(Cr), forming a new active heterogeneous PMo 12 @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.

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