| 초록 |
Selective C-H activation of methane to methanol or its precursor is an important issue both from a practical and academic standpoint. Recently, methane oxidation to methylbisulfate(MBS) in oleum media attracted great attention by the development of highly active homogeneous Pt catalysts K2PtCl4 and (DMSO)2PtCl2. However, lots of challenges associated with the use of strong acid remains in the commercialization of this method. One of the challenges is catalyst deactivation. Although (DMSO)2PtCl2 is more active than Periana catalyst and more stable than K2PtCl4, it also deactivated to PtCl2. In this study, Pt-black catalyst was used for the methane oxidation in oleum media. A MBS yield of 82.1 % with a selectivity of 96.5% was obtained at a catalyst loading of 1.6 mM at 180 oC, which proved the highest catalytic activity of Pt-black for this reaction. Furthermore, catalyst deactivation was not observed after the reaction. Separation of methane oxidation product from MBS-H2SO4 solution could be proceeded by using simple distillation method at the temperature lower than 100oC. |
