Reducing dioxin formation by adding hydrogen in simulated fly ash
2015
Yang, J | Li, X. D. | Meng, W. J. | Lu, S. Y. | Chen, T. | Yan, J. H. | Buekens, A. | Olie, K.
In this study, simulated fly ash containing CuO/CuCl₂ was heated at 350 °C in a flow of N₂ and also in a nitrogen flow containing 10 vol% H₂, to evaluate the influence of hydrogen adding on dioxin formation. The total polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) output derived from the CuO sample under N₂ and 10 % H₂ was 7.382 and 0.708 ng/g, respectively. As for CuCl₂, it was 589 and 46.1 ng/g, respectively. The results show that the hydrogen adding has a good inhibition effect on PCDD/F formation; the inhibition rate was higher than 90 % for PCDD/Fs. HCl and NH₃ were detected by Gasmet in the flue gas; the probable inhibition mechanism of hydrogen reaction was proposed, based on our measurements and others’ researches.
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