Resumo

VALENTINI, A. et al. Improved activity and stability of Ce-promoted Ni/γ -Al2O3 catalysts for carbon dioxide reforming of methane. Lat. Am. appl. res. [online]. 2004, vol.34, n.3, pp.165-172. ISSN 0327-0793.

The CO2 reforming of CH4 was carried out over Ni catalysts supported on γ -Al2O3 and CeO2-promoted γ -Al2O3. The catalysts were characterized by means of surface area measurements, TPR, CO2 and H2 chemisorption, XRD, SEM, and TEM. The CeO2 addition promoted an increase of catalytic activity and stability. The improvement in the resistance to carbon deposition is attributed to the highest CO2 adsorption presented by the CeO2 addition. The catalytic behavior presented by the samples, with a different CH4/CO2 ratio used, points to the CH4 decomposition reaction as the main source of carbon deposition.

Palavras-chave : Methane; Dry Reforming; CeO2. Carbon Formation; Syngas.

        · texto em Inglês     · Inglês ( pdf )