the effect of preparation method on the activity of bimetallic ni-fe catalyst in dry reforming of methane

This paper investigates the effects of fe/ni ratio (0.5-2) and polyvinyl alcohol to total metal ratio (pva/(ni+fe)=0.5-1.5) on the performance of bimetallic (ni-fe) catalysts in dry reforming of methane. the activity, stability, and h2/co ratio of the catalysts are tested. the effects of both metal ratio and shell factor on the catalyst performance have been studied. the nickel-ferrite catalysts were prepared by the sol-gel method. shell factor is employed for controlling the size of the particles. the samples were characterized by xrd, bet, sem, and tga. the catalysts were tested at 800˚c in the micro-reactor with a feed ratio of ch4/co2=1/1. the catalyst prepared with fe/ni=2 and pva/(ni+fe)=0.5 ratio shows the best activity and stability with 30 h time on stream. it can be attributed to nife2o4 as the only available phase after calcination and smaller crystal size at the optimum values of fe/ni and pva/(ni+fe) ratio.