Removal of NOx from flue gas with iron filings reduction following complex absorption in ferrous chelates aqueous solutions.
A novel process for removal of nitrogen oxides (NOx) from flue gases with iron filings reduction following complex absorption in iron-ethylenediaminetetraacetic acid aqueous solution is proposed. The reaction mechanism involved in the process is discussed briefly. The parameters influencing the process, including the concentration of ferrous chelates, initial pH, amount of iron filings, temperature, flow rate of the flue gas, and inlet nitric oxide concentration and oxygen content of the flue gas, are researched in detail. The optimal NOx removal conditions are established. The regeneration and circular utilization of the absorption solution also is studied.
Lefan
Ma
M
Environmental Engineering Department, Xiangtan University, Xiangtan, Hunan, China. mlf0001@sina.com
Zhiquan
Tong
T
Junfeng
Zhang
Z
D000042:Absorption; D000393:Air Pollutants / Q000302:isolation & purification*; D002614:Chelating Agents / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry*; D005579:Fossil Fuels; D017745:Incineration; D007501:Iron / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000302:isolation & purification*
D000393:Air Pollutants; D002614:Chelating Agents; D005579:Fossil Fuels; D009589:Nitrogen Oxides; D004492:Edetic Acid; D007501:Iron