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Steam reforming of tar from raw coke oven gas over bifunctional catalysts: Effects of preparation parameters on CO2 adsorption performance

From the thermodynamic analysis of the steam reforming process of raw coke oven gas, the H2 amplification factor after the reforming can reach the highest (over 3.5) in the temperature range between 650 and 800°C, where the bifunctional catalysts to be prepared should have the best CO2 adsorption performances as well as the excellent reforming catalytic performances. In this article, the bifunctional NiO/CaO@C12A7 catalysts were prepared at different preparation parameters, and among them, the catalyst sample prepared at the calcination temperature of 1,000°C and the calcination time of 4 h with co‐precipitation (CP) method showed the best CO2 adsorption capacity as well as the best characterizations. And, in the steam reforming experiments of tar component from RCOG (Raw coke oven gas), under the effect of the bifunctional catalyst, the higher H2 yield was obtained than that over the mixture of the independent reforming catalyst and CO2 sorbent.