Thermodynamic analysis of steel slag assisted coke oven gas reforming reaction

A novel thermodynamic equilibrium model for coke oven gas reforming reaction with steel slag was developed and the influence of operating parameters on the integrated process were investigated. The sensitivity analysis revealed that the optimal condition for the reforming reaction was the temperature of 1073 similar to 1173 K, CO2/C of 1.5-2.0 and atmospheric pressure. When the temperature reached 1073 K, H-2 and CO yield exceeded 107.75 kmol and 50.21 kmol, respectively. Meanwhile, the comparison of tar removal condition in the coke oven gas reforming reaction with/without steel slag were conducted. The yield of tar decreased from 2.45 x 10(-3) mu mol to 6.27 x 10(-7) mu mol. Furthermore, the influence of steel slag components on coke oven gas reforming reaction were considered at the range of slag basicity (2.0-5.0) and FeO content (18%-24%). The increase of FeO content was benefited to the conversion of tar components with the C6H6 decreased from 1.96 x 10(-6)mu mol to 6.27 x 10(-7) mu mol. Finally, the mechanism of coke oven gas reforming reaction with steel slag was established. This study offered valuable insights into improving coke oven gas reforming reaction with steel slag and provided the guidance of experiment and industrial production.