Simultaneous absorption of NO and SO2 into FeII–EDTA solution coupled with the FeII–EDTA regeneration catalyzed by activated carbon

Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone

“…Due to the fact that SO 2 is a key contributor to "acid rain" [1] and NO x also contributes considerably to both "acid rain" [1] and "greenhouse effect" [2], emissions of SO 2 and NO x , mainly from combustion of coal and fuel oils, have brought about significant effects on both environment and human health [3]. Various kinds of technologies have been developed to control and reduce SO 2 and NO x emissions worldwide.…”

Adsorption of EDTA on activated carbon from aqueous solutions

“…Many methods [8][9][10][11] have been put forward to regenerate Fe II -EDTA to sustain the NO removal efficiency. The authors [12] put forward to utilize activated carbon as a catalyst to speed up the regeneration of iron(II)(EDTA). Activated carbon is used to catalyze the reduction of Fe III -EDTA to Fe II -EDTA so as to maintain the capability of removing NO from gas streams.…”

“…Activated carbon is used to catalyze the reduction of Fe III -EDTA to Fe II -EDTA so as to maintain the capability of removing NO from gas streams. According to the mechanism discussed in literature [12], the adsorption of EDTA on activated carbon is an important factor affecting the catalytic reduction of Fe III -EDTA.…”

Effects of sintering flue gas properties on simultaneous removal of SO 2 and NO by ammonia-Fe(II)EDTA absorption

“…After 30-min of operation, the NO removal efficiencies decreased by 29.43%, 29.06%, 28.81%, 28.52%, and 28.38%, respectively. As discussed previously in a relevant study, sulfite/bisulfite is the reductant for the generation of Fe 2þ so that more SO 2 in the flue gas is beneficial to NO absorption into the Fe(II)EDTA solution because more sulfite/bisulfite will be produced in the absorbent [23]. But in this paper, the promotion of SO 2 concentration on NO absorption was not apparent.…”