Partial oxidation of methane with hydrogen peroxide over Fe-ZSM-5 catalyst
| Autor: | Min Sik Kim, Eun Duck Park, Sung June Cho, Ki Hun Park |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Chemistry
Iron oxide 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Adsorption Yield (chemistry) Hydrothermal synthesis Partial oxidation ZSM-5 0210 nano-technology Hydrogen peroxide Nuclear chemistry |
| Zdroj: | Catalysis Today. 376:113-118 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2020.07.007 |
| Popis: | The effect of the catalyst preparation method on the catalytic activity of Fe-ZSM-5 for the partial oxidation of methane with H2O2 in an aqueous phase was examined. UV–vis spectroscopy and FT-IR spectroscopy after NO adsorption were used to characterize the prepared catalysts. Various preparation methods, including wet impregnation, solid-state ion-exchange, chemical vapor impregnation, hydrothermal synthesis, and aqueous phase ion-exchange were compared. Among them, the aqueous phase ion-exchange method demonstrated the best results in producing isolated or oligonuclear extra-framework Fe species, which showed the highest catalytic activity. On the other hand, bulk iron oxides did not decompose H2O2 nor did they activate methane. The total product yield and the amount of H2O2 consumed increased with increasing Fe content in the case of the Fe-ZSM-5 catalyst prepared using an ion-exchange method. However, the fraction of less active Fe species, such as iron oxide clusters and larger iron oxide aggregates on the external crystal surface, increased with the Fe content, resulting in a decrease in the total product yield per Fe content and the amount of H2O2 consumed per Fe content. |
| Databáze: | OpenAIRE |
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