Methane dehydroaromatization over modified Mn/H-ZSM-5 zeolite catalysts: Effect of tungsten as a secondary metal
| Autor: | Neil J. Coville, Michael S. Scurrell, Themba E. Tshabalala |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010405 organic chemistry
Process Chemistry and Technology Inorganic chemistry chemistry.chemical_element General Chemistry Coke Manganese Tungsten 010402 general chemistry 01 natural sciences Catalysis Methane 0104 chemical sciences Metal chemistry.chemical_compound chemistry visual_art visual_art.visual_art_medium Selectivity ZSM-5 zeolite |
| Zdroj: | Catalysis Communications. 78:37-43 |
| ISSN: | 1566-7367 |
| DOI: | 10.1016/j.catcom.2016.02.005 |
| Popis: | The influence of tungsten (0.5–1.5 wt.%) on the MDA reaction was investigated at 800 °C. Addition of W to a 2Mn/H-ZSM-5 catalyst led to a decrease in methane conversion from 6 to 4%. An aromatic selectivity of 74% was obtained with the unpromoted catalyst but this decreased (i.e. from 41 to 12%) with increase in tungsten loading. Addition of Pt or Ru to a 1.5 W/2Mn/H-ZSM-5 catalyst led to an increase in aromatic selectivity from 12 to 55% (Pt) or 46% (Ru) while the coke selectivity decreased from 78 to 37% (Pt) or 42% (Ru) due to the hydrogenating activity of Pt and Ru. |
| Databáze: | OpenAIRE |
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