Ammonia-based wet flue gas desulfurization is a popular method in China for cleaning up emissions. Scientists created a model to simulate this process using a wet desulphurization column with ammonia as the cleaning agent. By studying factors like absorbent pH and gas flow rate, they found that the best conditions for removing sulfur dioxide from gas are a liquid-gas ratio of 2.2 to 2.8, a pH value of 5.8 to 6.5, and a gas velocity of 1.5 to 2.5 m/s. The model they developed matched well with real-world data, showing that it can help guide the industrial use of ammonia-based flue gas desulphurization.