Abstract
Pt/WOx/ZrO2 were prepared and evaluated for vinyl chloride (VC) oxidation. Increasing WOx loading amount caused the evolvement of tungsten state and the augmentation in the total acid amount facilitating VC adsorption and Cl removal. The electron transfer between Pt and WOx regulated the Pt dispersion, chemical state and redox property. High ratio of active Pt species and oxygen species facilitated oxidation and avoided coke formation. Pt/8W/ZrO2 with 8 wt%WOx outperformed Pt/ZrO2, for its reaction rate was 7 times higher than that of Pt/ZrO2 and kept stable for 60 h. 90% VC conversion could be achieved at 195 ℃ with 2% water and negligent chlorinated by-products was detected during oxidation.
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