Abstract
The steam reforming of methane over NiO/ZnO mixed oxides with different nickel contents was studied. Solids to x% Ni/ZnO (x = 4 and 10%) were deposited on ZnO by impregnation from nickel nitrate solution; after vaporization the solid is calcined at 500°C for 6 h. The catalysts were characterized by X-ray diffraction (XRD) and BET method, scanning electron microscopy (SEM) and temperature programmed reduction (TPR). The XRD patterns revealed the NiO phase for all calcined catalysts. The chemical analysis confirmed the theoretical values of nickel. The catalysts were pre-treated under hydrogen at 500°C in situ, overnight before testing for the steam reforming of methane reaction (CH4/H2O/Ar = 10/10/80) in the temperature range (475°C - 650°C) under atmospheric pressure. The activities of both catalysts were investigated in a fixed-bed reactor for the Methane Steam Reforming (MSR) reaction. Globally, it was shown that the catalyst 10% nickel content has an important effect on the catalytic performances of solids i.e. the better results of hydrogen production were obtained with 10% wt. Ni/ZnO (28 ′ 10-3 mol/g catalyst).
Highlights
For many years, the methane steam reforming (MSR) has been a leading technology for the generation of hydrogen in the refining and petrochemical complexes
How to cite this paper: Belhadi, A., Boumaza, S., Djadoun, A., Trari, M. and Cherifi, O. (2016) Methane Steam Reforming on Supported Nickel, Effect of Nickel Content for Product Hydrogen
The catalysts were characterized in the calcined state by atomic absorption BET method, X-ray diffraction (XRD), scanning electron microscopy (SEM) and temperature programmed reduction (TPR)
Summary
The methane steam reforming (MSR) has been a leading technology for the generation of hydrogen in the refining and petrochemical complexes. The natural gas is the cleanest of all fossil fuels and MSR is a well-established process for the production of syngas and hydrogen [1]. In this respect, numerous supported catalysts have been tested, especially nickel and noble metal based catalysts, which have been found to exhibit promising catalytic performance [2]. Hydrogen will have an important role in the future world economy scenario as a clean, renewable, and efficient fuel It has been widely used in the petro-chemical processes like hydro-desulfurization, hydro-cracking, hydro-refining and so on. The catalysts were characterized in the calcined state by atomic absorption BET method, X-ray diffraction (XRD), scanning electron microscopy (SEM) and temperature programmed reduction (TPR)
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