SO2 reacts with water and oxygen in flue gas to form sulphuric acid in a manner of adsorption and catalytic oxidation instead of simple physical adsorption.

• 活性焦以吸附催化氧化的方式而不是简单的物理吸附方式吸附SO2,使SO2与烟气中的水、氧气发生化学反应生成吸附态硫酸。