Abstract: The vanadium-contaminated agents were analyzed using methods such as XRD, XRF, BET, and H₂-TPR, and the effects of deposited vanadium in different valence states on the coke gasification reaction were investigated using a small fixed fluidized bed reactor. The results showed that under oxygen-deficient conditions, vanadium had a significant catalytic effect on reducing the n(CO)/n(CO₂) ratio in the coke gasification products over the contact agent, with higher-valence vanadium exhibiting a stronger catalytic effect. Experiments on CO oxidation indicated that vanadium on the contact agent significantly promoted this reaction, with higher-valence vanadium showing a stronger catalytic effect on CO oxidation. The reaction temperature had a substantial influence on the oxidation of CO to CO₂. Increasing the volume fraction of O₂ in the reactants promoted the formation of CO₂ in this reaction, while increasing the volume fraction of CO2 had a relatively minor effect on the n(CO)/n(CO₂) ratio of the reaction products.

Key words: coke, gasification, contact agent, vanadium, carbon monoxide, carbon dioxide