Ag-(Mo-W)/ZrO2 catalysts for the production of propylene oxide: Effect of pH in the preparation of ZrO2 support
| Autor: | Do Heui Kim, In Kyu Song, Jongheop Yi, Jong Won Lee, Hyung-Ki Min, Eo Jin Lee, Joongwon Lee |
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| Rok vydání: | 2018 |
| Předmět: |
Chemistry
Process Chemistry and Technology Inorganic chemistry Fraction (chemistry) 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Phase (matter) Propylene oxide 0210 nano-technology Selectivity Monoclinic crystal system |
| Zdroj: | Catalysis Communications. 111:80-83 |
| ISSN: | 1566-7367 |
| DOI: | 10.1016/j.catcom.2018.04.005 |
| Popis: | Direct oxidation of propylene to propylene oxide was carried out over Ag-(Mo-W)/ZrO2 (pH X) catalysts prepared by changing the pH of Zr precursor solution from 3 to 14 while preparing the ZrO2 support. It was found that the fraction of monoclinic phase and the ratio of acidity to basicity in the catalysts showed a volcano-shaped trend with respect to pH of Zr precursor solution. Such characteristics were well correlated with the selectivity of reaction towards propylene oxide. Ag-(Mo-W)/ZrO2 (pH 10) with the highest fraction of monoclinic phase of ZrO2 and ratio of surface acidity to basicity showed the highest selectivity (68%) for propylene oxide. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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