CAJ | 학술논문

The effect of oxidation pretreatment temperature ( 500 ~1 000 ℃) on the catalytic activity of Kovar applied on hydrocarbon CO2 reforming was examined.Catalytic performance evaluation using tetradecane at 800 ℃ with 70 μmol/s CO2 revealed 700 and 1 000 ℃ as the best pre-oxidation temperature in producing CO and H2 , respectively.XRD and SEM-EDX analyses showed that a separate metal oxide layer composed of iron oxide ( Fe2 O3 and F3 O4 ) , nickel, cobla t, and possibly thie r respective oxides started ot form when oxidation was conducted ta 700℃ or higher.The presence of iron enhanced the stability of nickel int he structure while the compact structure of Fe3 O4 resulted into the formation of a thick and rigid metal oxide layer on the surface of the Kovar tube.The strong physical bond between the metal oxide layer andK ovar tube provided the catalyst good mechanical strength and consequently good catalytic activti y.