Simultaneous removal of NOx and SO2 from flue gas using combined Na2SO3 assisted electrochemical reduction and direct electrochemical reduction

- This new system directly converted NOx and SO2 to harmless N2 and SO42−.
- Fast regeneration of Fe(II)(EDTA) was obtained.
- This new system could save energy and reduce consumption.
- The reduction by-product (Na2SO4) was recovered.
- Fe(II)(EDTA) solution was continuously recycled and reused during entire process.