Abstract
AbstractDry (CO2) reforming of methane is conducted over two newly synthesized Ni20/Ce‐γAl2O3and Ni20/Ce‐meso‐Al2O3catalysts. The x‐ray diffraction (XRD) patterns indicated that Ni20/Ce‐meso‐Al2O3exhibits a better dispersion of nickel, while Ni20/Ce‐γAl2O3has larger amounts of nickel crystallites. The temperature programmed desorption (TPD) kinetics analysis indicated that Ni20/Ce‐meso‐Al2O3had a lesser metal‐support interaction than the Ni20/Ce‐γAl2O3. The thermal gravimetric analysis (TGA) indicated that the incorporation of ceria into the Al2O3matrix helps to stabilize Ni20/Ce‐meso‐Al2O3during dry reforming of methane. The temperature programmed reduction (TPR) indicated that the synthesized catalysts were sufficiently reducible below 750 °C. A fixed bed reactor evaluation (at 750 °C) showed that both catalysts can facilitate methane reforming to syngas with minimal coking throughout the 30 hours time‐on‐stream (TOS). However, Ni20/Ce‐meso‐Al2O3is more promising in terms of prolonged stability for dry reforming applications. Moreover, the syngas yield for Ni20/Ce‐γAl2O3is close to equilibrium prediction during the first 1 hour of reaction time.
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