Chemical Engineering & Technology, Vol.44, No.2, 213-222, 2021
Ethanol Steam Reforming on CexMyO2 (M: Cu, Zn, and Mn) Solid Solution Catalysts
The effects of Cu, Zn, and Mn on CeO2 in ethanol steam reforming for hydrogen production were evaluated. Solid solution catalysts were analyzed by Brunauer-Emmett-Teller method, X-ray diffraction, temperature-programmed reduction, scanning electron microscopy, and energy dispersive X-ray. CeMn oxide showed the highest conversion and hydrogen yield. The entrance of Mn to the ceria lattice could enhance the catalyst reducibility. An increase of the Ce/Mn ratio led to high methane selectivity. Mn conducted the reaction to more CO2 generation and was also an effective metal for ethanol steam reforming reaction by adsorbing steam and the ability of oxygen mobility. Ce0.3Mn0.7 oxide provided moderate ethanol conversion and hydrogen yield. The catalyst exhibited higher conversion but lower hydrogen yield by adding Ni.