| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 61529 | Journal of Catalysis | 2012 | 6 Pages |
The catalytic oxidation of dichloromethane (DCM, 1000 ppm) in wet air was carried out in a fixed bed reactor over a range of Pt/γ-Al2O3 catalysts. The dichloromethane oxidation occurs following a bifunctional mechanism. DCM is disproportionated over γ-Al2O3 into a 1/1/3molar mixture of CO, CH3Cl, and HCl; the DCM transformation is followed by CH3Cl and CO oxidation into CO2. A mechanism of DCM disproportionation is proposed involving, as intermediates, formate species as well as alumina hydroxyl groups formed by water adsorption.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (84 K)Download as PowerPoint slideHighlights► DCM disproportionates into CO, CH3Cl, and HCl over γ-alumina. ► Pt oxidizes CO and CH3Cl into CO2. ► DCM oxidation follows a bifunctional mechanism over Pt/Al2O3. ► Oxygen does not intervene in CO formation. ► Water is necessary for hydroxyl group regeneration and catalysts stability.
