An investigation on pollutant emissions from co-firing of RDF and coal

Chyang, Chien-Song; Han, Yunlong; Wu, Liwei; Wan, Hou‐Peng; Lee, Hom-Ti; Chang, Ya Hui

doi:10.1016/j.wasman.2009.11.018

Cited by 49 publications

(32 citation statements)

References 26 publications

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“…The raw materials, operating technologies, and fuel types are important factors that may influence unintentional POP emissions during industrial thermal processes [29][30][31][32][33][34][35]. The possible influence of raw materials, fuel types, and plant scales on PCN concentrations in stack gas and fly ash samples were preliminarily investigated in this study.…”

Section: Pcn Emissions In Major Dischargesmentioning

confidence: 99%

“…Previous studies have indicated that during industrial processes PCDD/F emissions change as the conditions change [32][33][34][35][36][37]. Studies on PCN emission variations in industrial processes are scarce.…”

Section: Trends In Concentration As Smelting Stage Changesmentioning

confidence: 99%

“…AL1 and AL3 had the highest levels of PCN formation in the FD stage. Studies have indicated that PCDD/Fs can form during the unsteady state in industrial thermal processes [32,37]. At the FD stage, the raw materials melt as a result of fuel combustion.…”

Section: Trends In Concentration As Smelting Stage Changesmentioning

confidence: 99%

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Case study of polychlorinated naphthalene emissions and factors influencing emission variations in secondary aluminum production

Jiang

Liu

Wang

et al. 2015

Journal of Hazardous Materials

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h i g h l i g h t s• Variations in PCN emissions from different smelting stages were observed.• Factors influencing PCN emission levels and profiles were identified.• Addition of chloride additives possibly promote PCN formations.• Emission factors for gaseous and various solid discharges were derived.• This study is helpful for developing better control strategies for PCN reduction. Keywords: Secondary aluminum production Smelting stages Polychlorinated naphthalene Solid residues Chloride additives a b s t r a c t Secondary aluminum production has been recognized as an important source of polychlorinated naphthalenes (PCNs). Large variations in PCN emissions as the smelting process proceeds have not been determined. In this study, solid and gaseous discharges, including fly ash, slag, and stack gas samples collected from four secondary smelting plants during different smelting stages were analyzed for PCNs. The average emission factor of 1−8 PCNs to air was calculated to be 17.4 mg t −1 , with a range of 4.3-29.5 mg t −1 . The average emission factors of 1-8 PCNs from fly ash and slag were 55.5 ng t −1 and 0.13 ng t −1 , respectively. The derived emission factors may enable a more accurate estimation of annual emissions and a more comprehensive knowledge of the distribution of PCNs emitted from secondary aluminum production. The emission levels and characteristics of PCNs during different smelting stages were compared. Possible factors, including the organic impurities from aluminum scrap, fuel, and chloride additives, which could contribute to variations in PCN emissions and characteristics were discussed. These results may provide useful information for developing better control strategies for reducing PCN emissions in secondary aluminum production.

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Section: Pcn Emissions In Major Dischargesmentioning

confidence: 99%

Section: Trends In Concentration As Smelting Stage Changesmentioning

confidence: 99%

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Case study of polychlorinated naphthalene emissions and factors influencing emission variations in secondary aluminum production

Jiang

Liu

Wang

et al. 2015

Journal of Hazardous Materials

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“…However, the direct co-combustion of coal and raw MSW is not recommended because the latter is mutable and has high water and incombustible components. In contrast, refuses derived fuel (RDF) made form MSW has uniform properties, higher calorific value and lower moisture content, which leads to better combustion performance [3].…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric Investigation on Co-combustion Characteristics of Coal Gangue with Municipal Refuse Derived Fuel

Li¹,

Zhao²,

Qin³

et al. 2017

dteees

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Abstract. In this work, the combustion characteristics of coal gangue (CG), municipal refuse derived fuel (RDF) and their blends were investigated via thermogravimetric analysis. Effects of the RDF on the whole co-combustion process like the devolatilization, ignition, and burnout characteristics were analyzed. The results showed that the combustion profiles of RDF were more complex than that of coal gangue. The blending of RDF could improve the combustion characteristics of coal gangue, especially the volatile release and ignition characteristics. Further, the kinetic results showed RDF could improve the reactivity of char combustion stage of the co-fuels and the effect was more pronounced with higher RDF blending ratio. All of these results indicated the feasibility of co-combustion of RDF and coal gangue in the existing coal gangue power station.

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“…Pulp sludge can be mixed with tires, bituminous coal, and RDF-5 as an auxiliary fuel [1,2] or a cofiring material [3,4]. In Taiwan, over 99.5% of all energy used is imported; therefore, new technologies and energies have been a focus of research.…”

Section: Introductionmentioning

confidence: 99%

Combustion behavior and optimal proportion of industrial sludge‐derived fuels

Chiou¹,

Chen

Lin³

2013

Env Prog and Sustain Energy

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This work develops an application of industrial sludge‐derived fuels (ISDF) that is based on the acceptable calorific value of pulp sludge and textile sludge. The optimal proportions of pulp sludge and textile sludge in ISDF are determined to produce the ISDF to obtain its optimal combustion efforts. Experimental results demonstrate that the calorific values of pulp sludge and textile sludge are 9.46 and 15.25 MJ kg−1, respectively, establishing the potential to be sludge‐derived fuels. Adding textile sludge increased the calorific value and flammability of ISDFs. The fibrous tissues in pulp sludge strengthened the cementing property of ISDFs. ISDFs regained 2.55–3.72% moisture after 72 h; their unit dry weight was 0.63–0.72 g cm−3; their compressive strength was 3.78–5.80 kgf cm−2; and their calorific value was 9.46–11.20 MJ kg−1. Adding 10% calcium hydroxide by weight reduced the calorific value of the ISDFs by 18.30–22.86%. The flame temperature of ISDFs in 5 min was 193.8–233.7°C. The optimal ISDF was PS70TS30. © 2013 American Institute of Chemical Engineers Environ Prog, 33: 1000–1007, 2014

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An investigation on pollutant emissions from co-firing of RDF and coal

Cited by 49 publications

References 26 publications

Case study of polychlorinated naphthalene emissions and factors influencing emission variations in secondary aluminum production

Case study of polychlorinated naphthalene emissions and factors influencing emission variations in secondary aluminum production

Thermogravimetric Investigation on Co-combustion Characteristics of Coal Gangue with Municipal Refuse Derived Fuel

Combustion behavior and optimal proportion of industrial sludge‐derived fuels

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