Abstract:

For CH₄ reforming with CO₂ reaction, the effect of the plasma introduction mode in catalyst preparation processing on the catalytic performance of nickel-based catalysts was investigated. The catalysts were characterized by H₂-TPR, BET, CO₂-TPD, XRD, CO₂-TPSR, TGA and XPS analyses. The catalyst treated by N₂ plasma before reduction showed higher activity at low temperature than conventional calcination catalyst. The catalyst prepared by this way exhibited an improved dispersion of nickel and an increased amount of absorbed CO₂. Furthermore, the formation of coke was inhibited and only one carbonaceous species presented on the used catalyst. Owing to the plasma treatment, the nitrate decomposition and catalyst reducibility were remarkably promoted, and a higher specific surface area was obtained.

Key words: Ni-based catalyst; Plasma; Methane reforming; Coke deposition