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Manoj Pudukudy,Zahira Yaakob,Khaleeda Mhd Syahri,Qingming Jia,Shaoyun Shan 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.84 No.-
A set of Fe/ZrO2 catalysts were successfully synthesized by a facile urea-assisted solid-state combustionmethod, and their catalytic test was evaluated for the thermal decomposition of undiluted-biogas intohydrogen-rich syngas and multiwalled carbon nanotubes (MWCNTs). The as-prepared catalysts werecharacterized by X-Ray diffraction (XRD), Scanning and Transmission electron microscopy (SEM andTEM), Nitrogen-physisorption, X-ray photoelectron spectroscopy and Temperature programmedreduction analyses. The iron was found in the form of hematite and metallic-iron in the fresh andreduced catalysts respectively. A suitable metal-support interaction due to thefine surface dispersion ofiron species on ZrO2 was observed in the catalysts. The N2-physisorption analysis indicated the reducedsurface area of the catalysts after iron loading. However, it does not influence the catalytic efficiency sincethe metal amount and metal-support interaction was determined to play the main role. The Fe/ZrO2catalysts exhibited improved catalytic efficiency. With increasing the amount of iron and increasing thereaction temperature, the CH4 and CO2 conversions were increased significantly. A highest CH4 and CO2conversions of 92% and 89% respectively, with an H2/CO ratio of2.25 were obtained for the 50%Fe/ZrO2catalyst at 900 C. The enhanced catalytic performance could be attributed to thefine-surface dispersionof iron-nanocrystals on ZrO2. Moreover, the MWCNTs were characterized by XRD, SEM, TEM and Ramananalyses for their structural properties.