Abstract
Thermodynamic equilibrium constant method and mathematical model are used to analyze the investigating effects of temperature, α[oxygen-methane molar ratio] and β [carbon dioxide-methane molar ratio] on characteristics of oxidative CO2 reforming of methane reaction over Ni/Al2O3 catalysts to produce hydrogen in the membrane reactor. While keeping temperature at 1100 K, the membrane reactor is no longer useful to separate hydrogen when α > 0.6 for hydrogen in reaction side is no longer to permeate side. When increasing β, the methane conversion goes up firstly until the β is 1.3, which is higher than the inflection point at 1.1 in the model prediction. The hydrogen yield peaks at β = 0.5 in permeate side. Increasing the temperature or reducing the β will cause the molar ratio of H2/CO increase. However, changing α has no significant effect on adjusting the molar ratio of H2/CO. By establishing equilibrium reaction model, the system performance can be accurately predicted. Copyright © 2016 John Wiley & Sons, Ltd.
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