Investigation of bio-ethanol steam reforming over cobalt-based catalysts

Abstract The catalytic performance of cobalt catalysts supported on γ-Al 2 O 3 , TiO 2 , ZrO 2 were studied for bio-ethanol steam reforming (BESR) reaction. The supported catalysts (10 wt%Co) were prepared by impregnation and characterized through Thermogravimetric analysis (TGA), H 2 chemisorption, laser Raman Spectroscopy, Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS), and temperature-programmed reaction (TPRxn). The metallic cobalt sites were found to correlate with the BESR reaction activity. The reaction and H 2 chemisorption showed that ZrO 2 supported catalyst showed the best dispersion and best catalytic activity. Over the 10% Co/ZrO 2 catalyst, using a H 2 O:EtOH:inert molar ratio of 10:1:75 and a GHSV = 5000 h −1 , 100% ethanol conversion and a yield of 5.5 mol H 2 /mol EtOH were obtained at 550 °C and atmospheric pressure.

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