Effect of pretreatment conditions on Fe-ZSM-5 properties and performance for Fischer–Tropsch synthesis
Iron supported on ZSM-5 is a widely studied catalyst for Fischer–Tropsch synthesis (FTS). Iron is activated with H 2 , CO, or a mixture of CO and H 2 prior to FTS, resulting in phase transformations that make it challenging to understand structure–property relationships. In this work, we demonstrate...
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| Veröffentlicht in: | Catalysis science & technology 2025-01, Vol.15 (2), p.435-447 |
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| creator | Agwara, Jane N. Leshchev, Denis Perera, Sinhara M. H. D. Bauer, Alexis K. Neidig, Michael L. Porosoff, Marc D. |
| description | Iron supported on ZSM-5 is a widely studied catalyst for Fischer–Tropsch synthesis (FTS). Iron is activated with H 2 , CO, or a mixture of CO and H 2 prior to FTS, resulting in phase transformations that make it challenging to understand structure–property relationships. In this work, we demonstrate that increasing the pretreatment temperature of Fe–Na-ZSM-5 reduces CO conversion irrespective of the reductant, but the product selectivity, iron particle size, composition, CO adsorption properties, and zeolite structure is dependent on both the pretreatment temperature and reductant. Pretreatment of Fe–Na-ZSM-5 in H 2 induces sintering of iron particles, increasing C 2 –C 4 olefins and C 5+ hydrocarbons selectivity from 19.0% and 14.0% at 350 °C to 28.2% and 25.4% at 770 °C, respectively. Conversely, CO pretreatment facilitates carbide formation, coke deposition, and CH 4 formation. |
| doi_str_mv | 10.1039/D4CY00765D |
| format | Article |
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Pretreatment of Fe–Na-ZSM-5 in H 2 induces sintering of iron particles, increasing C 2 –C 4 olefins and C 5+ hydrocarbons selectivity from 19.0% and 14.0% at 350 °C to 28.2% and 25.4% at 770 °C, respectively. 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Pretreatment of Fe–Na-ZSM-5 in H 2 induces sintering of iron particles, increasing C 2 –C 4 olefins and C 5+ hydrocarbons selectivity from 19.0% and 14.0% at 350 °C to 28.2% and 25.4% at 770 °C, respectively. 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| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Alkenes Carbon monoxide Chemical synthesis Fischer-Tropsch process Iron Phase transitions Pretreatment Reducing agents Temperature dependence |
| title | Effect of pretreatment conditions on Fe-ZSM-5 properties and performance for Fischer–Tropsch synthesis |
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