Abstract
Ni-foam-structured CeO2-NiO-Al2O3 catalysts to be used for oxidative dehydrogenation of ethane to ethylene (ODE) have been developed, via chemically etching a Ni-foam followed by CeO2 modification. The CeO2-NiO-Al2O3/Ni-foam catalysts are highly active and selective with promising stability. With the increase in CeO2 loading up to 10wt%, ethane conversion is increased monotonously while ethylene selectivity shows volcano-shaped evolution and reaches its maxima at 7wt% CeO2 loading. A high ethylene productivity of 425 gEthylene kgcat−1h−1 is achieved for a feed gas of C2H6/O2/N2=1/1/8 at 450°C and a gas hourly space velocity of 18,000cm3g−1h−1. Promotion effect of CeO2 additive is also discussed.
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