Reducing dioxin formation by adding hydrogen in simulated fly ash

• Published in: Environmental science and pollution research international Vol. 22; no. 17; pp. 13077 - 13082
• Main Authors: Yang, J., Li, X. D., Meng, W. J., Lu, S. Y., Chen, T., Yan, J. H., Buekens, A., Olie, K.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.09.2015; Springer Nature B.V
• Subjects: Activated carbon; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Benzofurans - chemistry; Coal Ash - chemistry; Copper; Copper - chemistry; Dioxins; Dioxins - chemistry; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Flue gas; Fly ash; Hydrogen; Hydrogen - chemistry; Incineration; Laboratories; Nitrogen; Polychlorinated dibenzodioxins; Ratios; Research Article; Studies; Waste Water Technology; Water Management; Water Pollution Control; CuO/CuCl; Fly ash; Incineration; Hydrogen; De novo synthesis; Inhibition; Nitrogen; PCDD/Fs; Formation
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-015-4335-8

In this study, simulated fly ash containing CuO/CuCl 2 was heated at 350 °C in a flow of N 2 and also in a nitrogen flow containing 10 vol% H 2 , 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 N 2 and 10 % H 2 was 7.382 and 0.708 ng/g, respectively. As for CuCl 2 , 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 NH 3 were detected by Gasmet in the flue gas; the probable inhibition mechanism of hydrogen reaction was proposed, based on our measurements and others’ researches.