Effect of Fe substitution on the partial oxidation of methane to syngas over La0:7 Sr0:3 Co1?y Fey O3? perovskites
In this research, a series of La0:7 Sr0:3 Co1?y Fey O3? (y = 0.0–0.4) was successfully synthesized by a solidstatereaction method and syngas production studies were performed using gas chromatography. Thermogravimetricanalysis characterized the concentration of Fe3+ , which gave a low H2 /CO ratio over La0:7 Sr0:3 Co1?y Fey O3? withoutthe presence of molecular oxygen. All samples possessed a purely rhombohedral structure. The incorporation of moreFe increased the lattice parameter and changed XRD peaks of the La1?x Srx Co0:8 Fe0:2 O3 from sharp and single todouble. Among the catalyst powders tested for syngas production activity, La0:7 Sr0:3 Co0:6 Fe0:4 O3? (y = 0.4) hadthe low molar ratio of H2 /CO with high content of Fe3+ at 850 °C.
Keywords:
Cobalt, Fe3+, H2 /CO, nonstoichiometry, solid-state reaction,
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- ISSN: 1300-0527
- Yayın Aralığı: Yılda 6 Sayı
- Yayıncı: TÜBİTAK
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