Reforming of Methane with Carbon Dioxide over Nickel-loaded Zeolite Catalysts

Abstract

Catalytic performance of nickel-loaded zeolite-based supports for CO₂ reforming of methane was investigated. Among the three zeolites (H-Y, H-mordenite, and Na-mordenite), H-mordenite was the best support for the reaction, probably due to its thermal stability. The initial activity of Ni/H-mordenite (Ni/HM) was higher than that of conventional Ni/alumina catalyst (Ni/Al₂O₃), whereas deactivation of the former was slightly faster. A physical mixture of alumina and zeolite was a more effective support than zeolite. The resulting Ni/H-mordenite-alumina catalyst (Ni/HM-Al₂O₃) showed the highest performance among the catalysts tested. Under the conditions of atmospheric pressure of CO₂/CH₄/He stream (20/20/40ml/min)at 750°C, the initial CO₂ conversion was 95% and this value was maintained for more than 20h. The catalytic performance of Ni/HM-Al₂O₃ was higher than that of Ni/Al₂O₃.