A comparative study on catalyst deactivation of nickel and cobalt incorporated MCM-41 catalysts modified by platinum in methane reforming with carbon dioxide

Methane dry reforming with CO2 over Pt modified Co- and Ni-MCM-41 was comparatively studied. The incorporation of Co and Ni ions was completed by direct hydrothermal method while Pt was introduced by conventional wet impregnation. The catalytic results showed the introduction of an appropriate amount of Pt exhibited a higher activity compared to the unmodified Co- and Ni-MCM-41 catalysts. In the long-term stability test, Pt impregnated Ni-MCM-41 gave the highest conversion and catalytic stability, while a remarkable decrease of catalytic activity was observed over Pt impregnated Co-MCM-41, which was also lower than that of Pt impregnated MCM-41. The effect of Pt was suggested to be due to its lower tendency to carbon deposition. Characterization results showed a strong interaction between Pt and Co or Ni which facilitated the improvement of catalytic performance. (C) 2010 Elsevier B.V. All rights reserved.