Abstract
ABSTRACT In this artcile, methane catalytic oxidation was studied over the Ni/MgAl2O4 catalysts with different weight percentages of nickel oxide synthesized by a simple solid-state mechanochemical preparation method. The Mesoporous nanocrystalline Ni/MgAl2O4 catalysts with high specific surface area displayed high catalytic activity in methane catalytic oxidation. The obtained results demonstrated that the increment in Ni loading improved the CH4 conversion and CO2 selectivity. The influence of O2:CH4 molar ratio and gas hourly space velocity (GHSV) was investigated and the obtained results indicated that the increase in feed ratio and GHSV enhanced the CH4 conversion. Moreover, the incarease in calcination temperature from 500 to 700°C had a negative influence on the catalytic activity because of the formation of agglomerated particles on the calcined catalysts at higher temperatures.
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