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Effect of pretreatment conditions on Fe-ZSM-5 properties and performance for Fischer–Tropsch synthesis

Journal Article · · Catalysis Science & Technology
DOI:https://doi.org/10.1039/d4cy00765d· OSTI ID:2587333
Iron supported on ZSM-5 is a widely studied catalyst for Fischer–Tropsch synthesis (FTS). Iron is activated with H2, CO, or a mixture of CO and H2 prior to FTS, resulting in phase transformations that make it challenging to understand structure–property relationships. Furthermore, 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 H2 induces sintering of iron particles, increasing C2–C4 olefins and C5+ 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 CH4 formation.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
SC0012704
OSTI ID:
2587333
Alternate ID(s):
OSTI ID: 2480393
Report Number(s):
BNL--228848-2025-JAAM
Journal Information:
Catalysis Science & Technology, Journal Name: Catalysis Science & Technology Journal Issue: 2 Vol. 15; ISSN 2044-4761; ISSN 2044-4753
Publisher:
Royal Society of Chemistry (RSC)Copyright Statement
Country of Publication:
United States
Language:
English

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