The role of copper(II) chloride in the formation of organic chlorine in fly ash

Weber, P. K.; Dinjus, E.; Stieglitz, L.

doi:10.1016/s0045-6535(00)00230-7

Cited by 59 publications

(44 citation statements)

References 2 publications

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“…Thus, cupric chloride was partly and totally reduced (to CuCl) at 300 and 400 C, respectively. Analysis of Cl K-edge NEXAFS showed evidence that the previously reported reduction of cupric chloride 4,15 triggered chlorination of carbon by chlorine from copper. This also indicated that the chlorination potential was weakened by reduction to CuCl.…”

Section: Comparison Of Influences Among Heavy Metal Chloridesmentioning

confidence: 75%

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Chlorination Mechanism of Carbon during Dioxin Formation Using Cl-K Near-edge X-ray-absorption Fine Structure

et al. 2010

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Many environmental organic chemicals have chloride in their structure. Thus, researching the chlorination mechanism of carbon is of interest. Dioxins are typically concentrated in fly ash collected from the post-combustion zone during the operation of municipal solid waste incinerators. In this study, we report the application of Cl-K near-edge X-rayabsorption fine structure (NEXAFS) in determining the chlorination mechanism of carbon in fly ash. The separation of a chloride-carbon (C-Cl) bond was readily recognizable as a peak in the Cl-K NEXAFS spectrum. Chlorination effects could be estimated using Cl K-edge NEXAFS with no dependence on metal species. Analysis of Cl K-edge NEXAFS spectra showed the reduction of copper(II) chloride at 300 C and oxidation of iron(III) chloride at 400 C in connection with the chlorination of carbon.

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Section: Comparison Of Influences Among Heavy Metal Chloridesmentioning

confidence: 75%

“…4 Although many such studies have concluded that a relationship exists between the amount of chlorine source as input and the amount of dioxins as output, the behavior of the Cl atom has not been studied directly. Thus, the chlorination mechanism of the carbon structure itself has remained unknown.…”

Section: Introductionmentioning

confidence: 99%

Chlorination Mechanism of Carbon during Dioxin Formation Using Cl-K Near-edge X-ray-absorption Fine Structure

et al. 2010

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“…This process can be catalyzed by aluminum, copper, and other metals (Weber et al, 2001;Ryu et al, 2003;Fujimori et al, 2009Fujimori et al, , 2013.…”

Section: Introductionmentioning

confidence: 99%

Formation and emission of brominated dioxins and furans during secondary aluminum smelting processes

et al. 2016

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“…For example, Dickson et al used MWI fly ash and synthetic mixtures containing silica gel and pulverized activated charcoal as matrices in simulation experiments to investigate the thermal formation of PCDD/Fs during MWI processes (Dickson et al 1992;Karasek and Dickson 1987). Weber et al studied the de novo synthesis of PCDD/Fs from polycyclic aromatic hydrocarbons on a model MWI fly ash (Weber et al 2001a). However, no simulation studies have yet been performed to investigate PCDD/F formation during SeCu processes.…”

Section: Introductionmentioning

confidence: 99%

Formation and potential mechanisms of polychlorinated dibenzo-p-dioxins and dibenzofurans on fly ash from a secondary copper smelting process

Wang

Liu

Jiang

et al. 2015

Environ Sci Pollut Res

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Secondary copper smelting (SeCu) is widely considered to be an important source of polychlorinated dibenzop-dioxins and dibenzofurans (PCDDs and PCDFs; PCDD/Fs). Laboratory experiments were performed using SeCu fly ash as a matrix for thermochemical reactions to investigate the effects of fly ash on the formation of PCDD/Fs and the potential mechanisms. Thermochemical reactions on SeCu fly ash over a temperature range of 250-450°C and reaction times of 10-120 min caused the PCDD/F concentrations in the fly ash to increase significantly. The PCDD/F concentrations formed in the thermal reactions were about 99-139 times higher than the PCDD/F concentrations in the original fly ash, clearly indicating that fly ash promoted the formation of PCDD/Fs. The PCDFs dominated the PCDDs, and the PCDF/PCDD concentration ratio was about 30-40. Octachlorodibenzofuran ( O C D F ) , o c t a c h l o r o d i b e n z o -p -d i o x i n , a n d t h e heptachlorodibenzofurans were the most dominant homologs that were formed. A comparison of the PCDD/F patterns produced in the thermochemical reactions and the patterns in the original fly ash suggested that the chlorination of less chlorinated PCDFs might be an important pathway in the formation of higher chlorinated furans. The results of this study indicated that SeCu fly ash has a high PCDD/F formation potential. It is crucial to have the fly ash filter at low temperature and that fly ash in the cooling system should be minimized.

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The role of copper(II) chloride in the formation of organic chlorine in fly ash

Cited by 59 publications

References 2 publications

Chlorination Mechanism of Carbon during Dioxin Formation Using Cl-K Near-edge X-ray-absorption Fine Structure

Chlorination Mechanism of Carbon during Dioxin Formation Using Cl-K Near-edge X-ray-absorption Fine Structure

Formation and emission of brominated dioxins and furans during secondary aluminum smelting processes

Formation and potential mechanisms of polychlorinated dibenzo-p-dioxins and dibenzofurans on fly ash from a secondary copper smelting process

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