The DOI matches its Crossref record; 31 of the 31 references it cites were found in a registry or an index.
Enhanced Carbon-Resistant Dry Reforming Fe-Ni Catalyst: Role of Fe
Abstract
A series of bimetallic Fe-Ni/MgAl 2 O 4 catalysts with Fe/Ni ratios between 0 and 1.5 have been examined for methane dry reforming at 923–1073 K, atmospheric pressure, and a CH 4 /CO 2 ratio of 1. The evolution of the catalyst structure during H 2 temperature-programmed reduction (TPR), CO 2 temperature-programmed oxidation (TPO), and dry reforming is examined using time-resolved in situ X-ray diffraction (XRD). During H 2 -TPR up to 973 K, Fe 2 O 3 and NiO are reduced to Fe and Ni. Higher temperatures lead to Fe-Ni alloy formation. The alloy remains stable up to 900 K under CO 2 -TPO and is decomposed to Ni and Fe 3 O 4 at higher temperatures. The Fe-Ni alloy is the active phase while Fe partially segregates from the alloy forming FeO x during dry reforming. This is beneficial as it reduces the surface carbon accumulation through interaction with FeO x lattice oxygen, producing CO. Alternate CH 4 and CO 2 pulse experiments over Ni, Fe, and Ni-Fe samples showed that dry reforming over Fe-Ni catalysts can follow a Mars–van Krevelen mechanism. A molar Fe/Ni ratio of 0.7 provides the most active and least deactivated catalyst. All studied catalysts can be regenerated by CO 2 carbon removal.
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Metadata
- Authors
- Theofanidis, S. A., Galvita, V. V., Poelman, H., & Marin, G. B.
- Venue
- ACS Catalysis
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-04-16
- Volume
- 5
- Issue
- 5
- Pages
- 3028-3039
- ISSN
- 2155-5435 (ISSN-L)
- OpenAlex
- W2074440069
- Cited by
- 508
- References
- 31
- FWCI
- 12.75
- Type
- journal article
- Language
- en
- Open access
- closed
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