Performance of V₂O₅/ AC Activated with the Flue Gas on SO₂ Removal

Abstract

With the minimum Gibbs energy of the system by computer simulation and experiments, the activity of activated coke (AC) and V₂O₅/AC was studied by the main components change in the system of flue gases activation. The results of calculating and experiments show that the change of value of carbon monoxide concentration in the system can be used to estimate the desulfurization activity of AC and V₂O₅/AC, and to find fitting flue gases. When the temperature of activation is 800°C, the carbon monoxide concentration increases as the amount of V₂O₅ in the AC rise, the V₂O₅ in the AC can be changed into V₂O₃ when there is carbon monoxide in the system. When the amount of V₂O₅ is greater than 5% of the AC, the increase trend of concentration of carbon monoxide will gradually weaken If there is air or O₂ in the desulfurization process, the V₂O₃ in the AC will be changed into V₂O₄, and then to active V₂O₅. The active V₂O₅ in porous AC has a higher catalytic activity than V₂O₅. In the temperature range of 150~200°C, the catalyst V₂O₅/AC shows good performance for SO₂ removal and is gradually deactivated at temperature above 200°C.