CO2 reforming of methane on Ni and Co containing γ-Al2O3/HY zeolite supported catalysts

Abstract

The carbon dioxide reforming of methane is one of the most effective processes to produce syngas while reducing greenhouse gases. In this study, the catalytic activity and coke resistance were studied on the Ni-based catalysts with or without Co (10%wt) over γ-Al2O3-HY zeolite support. Such catalysts were prepared by the sol-gel method with various different metal loadings and Co/Ni ratio. The activity tests on the carbon dioxide reforming reaction were performed in a fixed-bed reactor with the CH4:CO2 feed volume ratio of 1:1 under atmospheric pressure at 700°C which is the best temperature for the catalysts activity. It has been found that the addition of Co in the bi-metallic showed better catalytic activity and coking resistivity than the Ni monometallic system suggested by the time-on-stream results and the decrease in the amount of Ni oxide and Co oxide confirmed by the absence of their peaks. Therefore, the good catalyst was 7%Ni-3%Co/γ-Al2O3-HY zeolite that had the highest CO2 and CH4 conversion with highest H2 selectivity.