investigating the activity of the supported bimetallic ni-co catalysts on the dry reforming of methane

In this work, the effect of the si/al ratio on the activity of zeolite supported bimetallic (ni-co) catalysts for dry reforming of methane (drm) has been studied. samples are prepared with impregnation and sol-gel methods and then calcined at 550 °c for 2 h. the catalysts were characterized by xrd, xrf, fesem, bet and tga. all samples were tested in a micro reactor at three different temperatures (i.e. 700, 750, and 800 °c). micro reactor test results showed that 800 °c was the proper temperature for drm. the catalyst with 5 wt % of ni and 2.5 wt % of co supported on γ-alumina have shown a higher h2/co ratio than other samples. for the zeolite supported catalysts when ni/co=2/1, the surface area and pore volume decreased but the h2/co ratio increased by increasing the si/al ratio. reverse the water gas shift (wgs) reaction was not very active when the catalyst and support showed a basic property. also, the stability of the catalysts has been tested for 30h on stream.