PCDD/F in flue gas and in bottom ash of lignite domestic combustion and the role of the salt content of the burned briquettes

Thuβ, U.; Herzschuh, Rainer; Popp, Peter; Ehrlich, Chr.; Kalkoff, W

doi:10.1016/s0045-6535(97)00411-6

Cited by 8 publications

(2 citation statements)

References 40 publications

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“…Bottom ash is a coarse, angular material of porous surface texture and ranges from fine gravel to fine sand in size and is predominantly sand-sized (Rogbeck and Knutz, 1996;Ceriaf et al, 1999;Baba, 2002). Due to the inherent salt and heavy metal content and in some cases low pH this material may exhibit corrosive and toxic properties (Roth at al., 1983;Thuß et al, 1997;Wang et al, 1999;Goodarzi and Huggins 2001). This material is highly susceptible to degradation under compaction and loading; as a result, bottom ash is not an acceptable aggregate for most highway construction applications.…”

Section: Introductionmentioning

confidence: 99%

Mineralogy and Organic Matter Content of Bottom Ash Samples From Agios Dimitrios Power Plant, Greece

et al. 2004

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Four bottom ash samples from the Power Units of the Agios Dimitrios Power Plant were studied by the method of PXRD to determine their semi-quantitative mineralogical composition. Their organic matter content was calculated by a wet chemical process. Also, the loss on ignition was measured. The samples are constituted mainly of calcite, quartz and feldspars, while micas, clays, gehlenite and portlandite were determined in a few samples in smaller quantities. The amorphous material varied between 10-43 wt. %, while organic matter varied between 5-42 wt. %. Measurements of the loss on ignition overestimate the unburned lignite contents in the bottom ash samples. The management of bottom ashes with high contents of unburned lignite should differ to that of the fly ashes. The oxidation of the inorganic compounds of the unburned lignite may lead to environmental degradation of the landfill areas. Samples showing lower values of organic matter are suitable for a series of uses, such as: snow and ice control, as an aggregate in lightweight concrete masonry units,as a raw feed material for portland cement, as an aggregate in cold mix emulsified asphalt mixes, base or sub-base courses, or in shoulder construction. Systematic study of the unburned lignite of bottom ashes is needed for possible re-combustion.

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Section: Introductionmentioning

confidence: 99%

Mineralogy and Organic Matter Content of Bottom Ash Samples From Agios Dimitrios Power Plant, Greece

et al. 2004

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“…The presence of chlorine in wood increases the PCDD/F formation, due to either salt-laden wood or organochlorinated additives, such as pentachlorophenol (Altwicker et al, 1990;Preto et al, 2005;Thuβ et al, 1997;Yasuhara et al, 2003). Some typical preservatives of wood show Cu in their composition, such as copper chromium arsenate, copper chrome boron, alkaline copper quaternary, copper boron azole, and copper naphthenate.…”

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Characterization of gaseous emissions and ashes from the combustion of furniture waste

2016

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Gaseous emissions and ash obtained in the combustion of furniture waste have been studied, with particular emphasis on the emissions of hazardous pollutants, such as PCDD/Fs and dl-PCBS. Two different combustion procedures were carried out, one of them in a conventional residential stove (without an automatic control of combustion air and bad mixing of combustion gases with air), and the other in a laboratory-scale reactor (operating under substoichiometric conditions). Three different experiments were carried out in the residential stove, in which the gaseous emissions and ashes obtained were analysed. The fuel burnt out in two of the experiments was furniture wood waste and in one of the experiments, the fuel burnt out was briquettes composed of a mixture of furniture wood with 10wt.% of polyurethane foam. One of the purposes of these experiments was the evaluation of the possible inhibition effect of the higher nitrogen content on the formation of PCDD/Fs. Slight inhibition of the PCDD/F formation was found although, it is noteworthy that the lowest yield of PAHs, volatile and semi-volatile compounds were obtained in the combustion of these briquettes. In all experiments, the emission factors of polychlorinated dibenzo-p-dioxins and dibenzofurans and dioxin-like polychlorinated biphenyls (PCDD/Fs and dl-PCBs) were between 29 and 74ng WHO-TEQ/kg sample burnt, lower than that obtained by other authors in the burning of pine needles and cones. PCDD/Fs and dl-PCBs emissions from furniture wood waste combustion were also analysed in the laboratory scale reactor at 850°C and the results were compared with the values obtained from the combustion of solid wood (untreated wood). The total equivalent toxicity obtained was 21.1ng WHO-TEQ/kg sample for combustion of furniture wood waste, which is low in comparison with those obtained for other waste combustion in similar conditions. In the laboratory scale reactor, PCDFs were the dominant compounds in the profiles of PCDD/Fs, by contrast, in the combustion in the residential stove, the majority compounds were PCDDs, due to the different operation conditions.

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Identification and Quantification of Thiaarenes in the Flue Gas of Lignite-Fired Domestic Heating

Thuß

Popp

Ehrlich

et al. 2000

J. High Resol. Chromatogr.

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PCDD/F in flue gas and in bottom ash of lignite domestic combustion and the role of the salt content of the burned briquettes

Cited by 8 publications

References 40 publications

Mineralogy and Organic Matter Content of Bottom Ash Samples From Agios Dimitrios Power Plant, Greece

Mineralogy and Organic Matter Content of Bottom Ash Samples From Agios Dimitrios Power Plant, Greece

Characterization of gaseous emissions and ashes from the combustion of furniture waste

Identification and Quantification of Thiaarenes in the Flue Gas of Lignite-Fired Domestic Heating

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