Reduced cobalt phases of ZrO2 and Ru/ZrO2 promoted cobalt catalysts and product distributions from Fischer–Tropsch synthesis
| Autor: | Anwaraporn Suramitr, Yingyot Poo-arporn, Pinsuda Viravathana, Attera Worayingyong, Hans Schulz, Praewpilin Kangvansura |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Chemistry Alkene Mechanical Engineering Inorganic chemistry chemistry.chemical_element Fischer–Tropsch process Condensed Matter Physics XANES Catalysis Hydrocarbon Mechanics of Materials Methanation General Materials Science Steady state (chemistry) Cobalt Nuclear chemistry |
| Zdroj: | Materials Science and Engineering: B. 190:82-89 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2014.09.008 |
| Popis: | Co/SiO2 catalysts were promoted with 4% and 8% ZrO2. Small amounts (0.07%) of Ru were impregnated onto 4%ZrO2/Co/SiO2. Catalysts resulting from time-resolved XANES reduction showed mixed phases of Co and CoO, with the highest percentages of Co resulting from Ru/4%ZrO2/Co/SiO2 and the highest percentages of CoO resulting from 8%ZrO2/Co/SiO2. Product distributions of n-alkanes, iso-alkanes and alkenes during Fischer–Tropsch Synthesis (FTS) were used to investigate the catalyst performance of 4%ZrO2/Co/SiO2 8%ZrO2/Co/SiO2 and Ru/4%ZrO2/Co/SiO2. FTS steady state was studied by growth probabilities of n-alkane products. No 1-alkene was produced from Ru/4%ZrO2/Co/SiO2, indicating high availability of Fischer–Tropsch sites for long chain hydrocarbon growth, despite high methanation. Branched alkanes produced from the secondary reaction were related to the high CoO percentages on 8%ZrO2/Co/SiO2. Alkene readsorption sites were high, corresponding to the high CoO percentages, causing a high probability of forming branched alkane products. |
| Databáze: | OpenAIRE |
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