Researchers studied how to remove sulfur dioxide from flue gas using a method involving carbide. They found that factors like the ratio of liquid to gas, gas concentration, and pH of the solution can significantly affect the desulfurization process. Increasing the liquid-gas ratio and maintaining a high flue gas SO2 concentration can improve efficiency, but too high concentrations may reduce effectiveness. Keeping the slurry pH around 9 ensures a desulfurization rate above 90%. The process involves forming stable compounds to remove sulfur dioxide from the gas.