The Study of Catalytic Reforming of Coke Oven Gas Producing Hydrogen-Rich Gas

Two series of nickel-based catalyst, NiO/Al2O3 and NiO/MgO/Al2O3 were prepared by the impregnation and step-by-step impregnation methods in the experiment. Toluene as the tar model compounds, the effect of catalyst composition and reaction condition on the catalytic conversion of tar components in coke oven gas were investigated. The results showed that to get more methane at higher reaction temperature, catalyst of 0.1% NiO loading is prefered. MgO could reduce the carbon deposition on the catalyst surface. The high temperature was conducive to the formation of H2 and CO, but was not favorable for the CH4 formation in the investigated temperature. The space velocity had little influence on the production of H2 and CO, but the larger space velocity was good for the formation of CH4. In addition, higher H2O /toluene ratio brought a higher H2 production, but lower CO and CH4 production.