Comprehensive evaluation of flue gas desulfurization and denitrification technologies of six typical enterprises in Chengdu, China.

Post-combustion flue gas desulfurization and denitrification technologies are essential in achieving the full compliance of fine particulate matter (PM, aerodynamic diameter less than 2.5 μm) air quality standards by 2030 in China as sulfur dioxide (SO) and nitrogen oxides (NO) are the main precursors of PM. Some studies have addressed the performance evaluation of desulfurization technology, but none included the water-soluble ions (sulfate (SO), nitrate (NO), etc.