Catalytic oxidative desulfurization and denitration of organic sulfoxide catalysts
Xiong Yingying
Yang Yang
Bai Tao
Abstract：In order to develop a simple,effective and low-cost control method for coal-fired flue gas,the integrated technology of catalytic oxidative desulfurization and denitration of organic sulfoxide is based on the modeling test system.Results indicate that while the flue gas temperature is about 150 ℃,sulfoxide organic catalyst can remove elemental mercury and sulfur dioxide efficiently,and can remove a large number of nitrogen oxide in flue gas.Controlling system pH by adding ammonium hydroxide,the efficiency of mercury removal can reach 95％.When the pH value is greater than 6.3,the removal rate of sulfur dioxide is above 99.5％,and when the pH value is less than 4,the removal rate of sulfur dioxide is less than 60％.The removal of NOx depends on the form of NO and NO2 relatively in flue gas.In actual operation,the flue gas inlet is connected to the powerful oxidant O3 to oxidize NO to be N2O3 and NO2,then followed by subsequent removal.The removal efficiency of nitrogen oxide in flue gas can guarantee to 80％ or higher.Results indicate that the use of organic sulfone catalysts is a feasible option for the treatment of various pollutants in coal combustion under low temperature.
Keywords：organic sulfoxidecatalytic oxidativedesulfurizationdenitration
Publication Date：2017-01-01