An efficient eco-sustainable oxidative desulfurization process using mu-oxo-bridged Fe(III) complex of meso-tetrakis(pentafluorophenyl)porphyrin

作者：Aguiar Antonio; Ribeiro Susana; Silva Andre M N; Cunha Silva Luis; de Castro Baltazar; Silva Ana M G; Balula Salete S^*

来源：Applied Catalysis A: General , 2014, 478: 267-274.

DOI：10.1016/j.apcata.2014.04.002

• mu-Oxodimeric iron(III) porphyrin
• Hydrogen peroxide
• Oxidative desulfurization
• Homogeneous catalysis
• Benzothiophene derivatives

The present work is the first report of using a Fe-III dimeric porphyrin as an active and efficient catalyst for the oxidative desulfurization of a multicomponent oil formed by the most refractory sulfur compounds in fuels (dibenzothiophene, DBT, 1-benzothiophene, 1-BT, and 4,6-dimethyldibenzothiophene, 4,6-DMDBT), using the biphasic system model oil/extraction solvent. The binuclear mu-oxodiiron(III) complex of meso-tetrakis(pentafluorophenyl)porphyrin mu-O(FeTPFPP)(2), was synthesized and characterized by UV/Vis spectroscopy, mass spectrometry and single-crystal X-ray diffraction. mu-O(FeTPFPP)(2) was shown to achieve a complete desulfurization after 2 h when acetonitrile and methanol were used as extraction solvents, in the presence of a residual amount of H2O2 as oxidant, at room temperature. The catalytic efficiency of the porphyrin was evaluated for each refractory sulfur compound following the order 1-BT%26gt;DBT%26gt;4,6-DMDBT. Surprisingly, the porphyrin presents a remarkable catalytic performance for the desulfurization of 1-BT when compared with other catalysts already reported in the literature. Furthermore, the extracting phase containing the porphyrin could be reused in consecutive desulfurization cycles.

• 出版日期2014-5-20