Core-shell KV@NiFe2O4 Catalyst and Its Performance in Dry Reforming of Methane
نویسندگان
1 Department of Chemical Engineering, Oil and Chemical Engineering Faculty, University of Hormozgan, Bandar Abbas, I.R. IRAN
2 Department of Mechanical Engineering, Engineering Faculty, University of Hormozgan, Bandar Abbas, I.R. IRAN
3 Department of Chemical Engineering, Oil and Chemical Engineering Faculty, University of Hormozgan, Bandar Abbas, I.R. IRAN
doi
10.30492/ijcce.2026.2064807.7183چکیده
This study investigates the performance of the core@shell KV@NiFe2O4 catalyst and compares it with the conventional NiFe2O4 catalyst in the dry reforming of methane. The primary aim of this article is to examine the effect of incorporating a shell onto the bimetallic NiFe2O4 catalyst and its impact on catalytic activity in dry reforming of Methane. All catalysts were synthesized with an Fe/Ni=2 molar ratio and PVA/(Ni+Fe) =0.5, with varying weight percentages of the KV shell (30, 35, and 40 wt.%) added to the NiFe2O4 catalyst. The catalytic activity, H2/CO ratio, and stability of the catalysts were evaluated. All samples were synthesized using the sol-gel method and characterized through XRD, BET, SEM, and TGA methods. Catalytic activity tests were conducted at temperatures of 1073 K and 1123 K, at different pressures (1, 3, and 5 atm), in a fixed-bed reactor with a feed containing CH4/CO2/N2 = 1/1/8. The 35KVNF core-shell catalyst containing 35 wt.% KV has the highest performance compared to other core-shell catalysts and conventional NF catalyst at a temperature of 1123 K and a pressure of 5 atm. This sample demonstrated high stability over a 72-hour reaction period. The enhanced performance is attributed to the high oxygen content in the NiFe2O4 catalyst structure and the K3V5O14 perovskite shell, which also contains a significant amount of oxygen.
