Pt black catalyzed methane oxidation to methyl bisulfate in H2SO4-SO3

Title
Pt black catalyzed methane oxidation to methyl bisulfate in H2SO4-SO3
Authors
김홍곤이현주하정명이웅트란 휴옌 당이희원제정호정민석
Issue Date
2019-06
Publisher
Journal of catalysis
Citation
VOL 374-236
Abstract
Although chloride-ligated Pt compounds like (bpym)PtCl2, K2PtCl4, and (DMSO)2PtCl2 has been reported to be highly active catalysts for the methane oxidation to methyl bisulfate (MBS) in oleum media, their applications is hampered by the catalyst deactivation to PtCl2. In this study, we investigated Pt black catalyzed methane oxidation, which has no ligand. A MBS yield of 82.1% with a selectivity of 96.5% was obtained at a catalyst loading of 1.6  mM at 180  °C, which proved the highest catalytic activity of Pt-black for this reaction. The reaction was thought to proceed by the dissolved Pt species, and no deactivation was observed during four consecutive experiments. However, at a concentration of over 30  mM, MBS yield fell due to the decomposition of MBS to CO2 on the surface of heterogeneous Pt(0). Vacuum distillation experiments showed the potential for isolating MBS from the oxidation product mixture as a major component.
URI
http://pubs.kist.re.kr/handle/201004/69993
ISSN
0021-9517
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KIST Publication > Article
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