Article history: A series of alkaline earth metal-promoted nickel catalysts supported on Al O –ZrO (Ni–X/AZ, X = Mg, 2 3 2 Received 1 November 2015 Ca, Sr, and Ba) were prepared by an epoxide-driven sol-gel method and a subsequent co-impregnation Received in revised form 7 February 2016 method. For comparison and reference, promoter-free Ni/Al O –ZrO catalyst (Ni/AZ) was also prepared 2 3 2 Accepted 8 February 2016 by an epoxide-driven sol-gel method and a subsequent impregnation method. The effect of alkaline Available online 10 February 2016 earth metal addition on the physicochemical properties and catalytic activities of Ni–X/Al O –ZrO 2 3 2 catalysts in the steam reforming of ethanol was investigated. The catalysts were characterized by nitro- Keywords: gen adsorption-desorption, ICP-AES, XRD, TPR, TEM, H -TPD, NH -TPD, and EtOH-TPD analyses. It was 2 3 Hydrogen production revealed that addition of alkaline earth metal promoters reduced acidity of the catalysts and positively Steam reforming of ethanol inﬂuenced catalytic activity in the steam reforming of ethanol. Hydrogen yield increased with the intro- Ni/Al O –ZrO catalyst 2 3 2 duction of promoter, which was attributed to enhanced nickel dispersion. Nickel surface area and ethanol Alkaline earth metal
Journal of Molecular Catalysis A: Chemical – Elsevier
Published: May 1, 2016
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