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| Experimental research of purification NO-containing gas by aqueous oxidation with Fenton-like agent |
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Abstract The fenton-like agent (H2O2/Fe3+/UV) liquid-phase oxidation method was used to purify the NO-containing gas. The mechanism of aqueous catalytic oxidation and fenton-like reaction in denitrification and their relationship were studied by investigating the influence of different operation parameters such as H2O2 concentration, [H2O2]/[Fe3+], initial pH value, gas flow, ultraviolet rays (UV) and adding H2O2 on the NO removal efficiency. The results showed that the efficiency was improved with the increase of H2O2 concentration, and the best efficiency could be achieved when [H2O2]/[Fe3+]=6. Furthermore, when the initial pH value was less than 3, the NO removal efficiency would increase due to the enhancement of pH value, while on the contrary when initial pH>3, and the best efficiency could be reached at the initial pH value at 3. Besides, other processing activities such as employing the UV or decreasing the flue gas mass flow rate could also raise the efficiency. The experiment indicated that the efficiency could be maintained at about 80% if adding H2O2 for three times.
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Received: 29 September 2011
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