Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Preparation and Evaluation of Nickel Catalysts Supported on Strontium Oxide-Promoted Alumina in Dry Reforming of Methane

Document Type : Research Article

Authors
Elaheh Amir
Fereshteh Meshkani
Mehran Rezaei
Department of Chemical Engineering, Faculty of Engineering, Kashan University, Kashan, I.R. IRAN
Abstract
In this research, the effect of Ni loading on the structural and catalytic properties of the Ni/10%Sr-Al2O3 catalyst prepared by the wet impregnation method was studied in dry reforming of methane. The samples were characterized by X-Ray Diffraction (XRD), N2 adsorption, temperature-programmed reduction and oxidation (TPR, TPO), and scanning electron microscopy (SEM) techniques. The XRD results revealed that increasing Ni loading increased the NiO particle size. The BET results showed that the catalysts possessed a mesoporous structure and 5%Ni/10%Sr-Al2O3 catalyst exhibited higher surface area and CH4 and CO2 conversions compared to the other catalysts. It was found that the raise in Ni loading from 5 to 15 wt.%, increased the amount of deposited carbon which was in agreement with the results of SEM analysis. In addition, the long term stability of the 5%Ni/10%Sr-Al2O3 catalyst showed high stability during 13 h on stream at 650 oC.
Keywords
Dry reforming of methane
Ni catalyst
Synthesis gas
Strontium promoter
High stability

Subjects

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