Reducing dioxin formation by adding hydrogen in simulated fly ash.
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.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Zheda Road 38#, Hangzhou, China.
J
J
Yang
X D
XD
Li
W J
WJ
Meng
S Y
SY
Lu
T
T
Chen
J H
JH
Yan
A
A
Buekens
K
K
Olie
D001572:Benzofurans / Q000737:chemistry; D060729:Coal Ash / Q000737:chemistry*; D003300:Copper / Q000737:chemistry; D004147:Dioxins / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*
D001572:Benzofurans; D060729:Coal Ash; D004147:Dioxins; D003300:Copper; D006859:Hydrogen; C029892:cupric chloride; C030973:cupric oxide