The researchers studied how the speed of gas flowing through a wet desulfurization system affects the removal of sulfur from emissions. They found that as the gas flow speed increases, the sulfur removal rate decreases, but the transfer of sulfur between the gas and liquid phases also increases. This leads to a slower decrease in sulfur removal rate. Faster gas flow reduces the difference in limestone concentration between the system's inlet and outlet, leading to higher dissolved limestone concentration and increased sulfur removal rate. Additionally, the concentrations of sulfur and calcium ions in different parts of the system increase with higher gas flow speeds.