Production of Renewable Hydrogen from Glycerol Steam Reforming over Bimetallic Ni-Cu,Co,Cr Catalysts Supported on SBA-15 SilicaReport as inadecuate


Production of Renewable Hydrogen from Glycerol Steam Reforming over Bimetallic Ni-Cu,Co,Cr Catalysts Supported on SBA-15 Silica


Production of Renewable Hydrogen from Glycerol Steam Reforming over Bimetallic Ni-Cu,Co,Cr Catalysts Supported on SBA-15 Silica - Download this document for free, or read online. Document in PDF available to download.

Department of Chemical and Energy Technology, ESCET, Rey Juan Carlos University, 28933 Móstoles, Spain





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Abstract Glycerol steam reforming GSR is a promising alternative to obtain renewable hydrogen and help the economics of the biodiesel industry. Nickel-based catalysts are typically used in reforming reactions. However, the choice of the catalyst greatly influences the process, so the development of bimetallic catalysts is a research topic of relevant interest. In this work, the effect of adding Cu, Co, and Cr to the formulation of Ni-SBA-15 catalysts for hydrogen production by GSR has been studied, looking for an enhancement of its catalytic performance. Bimetallic Ni-M-SBA-15 M: Co, Cu, Cr samples were prepared by incipient wetness co-impregnation to reach 15 wt % of Ni and 4 wt % of the second metal. Catalysts were characterized by inductively coupled plasma atomic emission spectroscopy ICP-AES, N2-physisorption, X-ray powder diffraction XRD, hydrogen temperature programmed reduction H2-TPR, transmission electron microscopy TEM, scanning electron microscopy SEM, and thermogravimetric analyses TGA, and tested in GSR at 600 °C and atmospheric pressure. The addition of Cu, Co, and Cr to the Ni-SBA-15 catalyst helped to form smaller crystallites of the Ni phase, this effect being more pronounced in the case of the Ni-Cr-SBA-15 sample. This catalyst also showed a reduction profile shifted towards higher temperatures, indicating stronger metal-support interaction. As a consequence, the Ni-Cr-SBA-15 catalyst exhibited the best performance in GSR in terms of glycerol conversion and hydrogen production. Additionally, Ni-Cr-SBA-15 achieved a drastic reduction in coke formation compared to the Ni-SBA-15 material. View Full-Text

Keywords: nickel; copper; cobalt; chromium; mesoporous silica; promoter; steam reforming; hydrogen; glycerin nickel; copper; cobalt; chromium; mesoporous silica; promoter; steam reforming; hydrogen; glycerin





Author: Alicia Carrero, José A. Calles, Lourdes García-Moreno and Arturo J. Vizcaíno *

Source: http://mdpi.com/



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