The article reviews different methods used to remove sulfur dioxide from flue gas, focusing on flue gas desulfurization systems. Researchers from IEA Coal Research in the UK examined various techniques for reducing sulfur emissions from power plants. The key findings include an overview of the different systems available and their effectiveness in reducing sulfur pollution. The goal was to provide a comprehensive analysis of flue gas desulfurization systems to help industries make informed decisions on reducing their environmental impact.