Enrichment and distribution of 24 elements within the sub-sieve particle size distribution ranges of fly ash from wastes incinerator plants

Raclavská, Helena; Corsaro, Agnieszka; Hartmann-Koval, Silvie; Juchelková, Dagmar

doi:10.1016/j.jenvman.2017.03.073

Cited by 31 publications

(15 citation statements)

References 32 publications

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“…Li et al 16 investigated the distribution characteristics of heavy metals in different sizes of FA from a sewage sludge circulating fluidized bed incinerator and corroborated that the heavy metal contents of small-sized FA were higher than those of large-sized FA. Raclavská et al 17 studied the enrichment and distribution of 24 elements within the subsieve particle size distribution ranges of FA from waste incinerator plants and affirmed that a great enrichment of the majority of elements was observed for a particle size range of <100 μm and was attributed to the vaporization and condensation mechanisms. López-Antón et al 18 investigated the behavior of thallium in a 50 MW industrial circulating fluidized bed combustion plant and the distribution of thallium among BA and FA.…”

Section: Introductionmentioning

confidence: 99%

Distribution Characteristics of Valuable Elements, Al, Li, and Ga, and Rare Earth Elements in Feed Coal, Fly Ash, and Bottom Ash from a 300 MW Circulating Fluidized Bed Boiler

Shan

Cheng

2019

ACS Omega

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Feed coal, fly ash (FA), and bottom ash (BA) were collected from a 300 MW circulating fluidized bed boiler. A mechanical screen classifier was used to separate and obtain particles with different sizes. The distribution of valuable elements, including aluminum (Al), lithium (Li), and gallium (Ga), and rare earth elements (REE) in the samples was investigated. Results indicate that the contents of SiO 2 and Al 2 O 3 in sized ash particles decreased as the particle size decreased; meanwhile, the contents of CaO, SO 3 , and Fe 2 O 3 apparently increased. The sulfur-fixing product anhydrite tended to be distributed in the fine ash particles. The valuable elements were more enriched in FA than in BA. The Li, Ga, and REE were evenly distributed in FA particles with different sizes. Separating ash particles with a superhigh concentration of these rare elements was difficult using the mechanical screen, but a part of the anhydrite or CaO in circulating fluidized bed ash could be removed easily. The Li and REE in the feed coal were highly associated with quartz, kaolinite, and other fractions containing SiO 2 and Al 2 O 3 . No definitive relationship between the Ga concentration and Al 2 O 3 content in the feed coal and ash samples was observed.

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Section: Introductionmentioning

confidence: 99%

Distribution Characteristics of Valuable Elements, Al, Li, and Ga, and Rare Earth Elements in Feed Coal, Fly Ash, and Bottom Ash from a 300 MW Circulating Fluidized Bed Boiler

Shan

Cheng

2019

ACS Omega

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“…Affinity of individual elements to Cl is different-approximate sequences of these affinities can be found in the literature [61][62][63][64]:…”

Section: Effect Of CLmentioning

confidence: 99%

Behavior of Cd during Coal Combustion: An Overview

et al. 2020

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Due to the unfavorable combination of its toxicity and high volatility, Cd is contained in most lists of potentially hazardous air pollutants with the greatest environmental and human-health concerns. The review paper evaluates the behavior of Cd during combustion (incineration) processes and its redistribution among condensed fractions (bottom ash/slag, fly ash) and volatilized fractions (that passes through most particulate control devices). The paper addresses all important effects of Cd interactions, such as presence of organic or inorganic chlorides, moisture levels, S, P and Na concentrations, flue gas composition etc. Possibilities of using various adsorbents (either within in-furnace regime or applied in post-combustion zone) are evaluated as well. Special attention is paid to mitigating its emissions factors; decreasing Cd volatility and facilitating Cd retention are discussed with the view of various combustion (incineration) conditions and the feed fuel composition.

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“…Regarding the increasing amount of industrial, agricultural and forest residues or municipal solid waste (MSW) (with respect to the theory that we might reach 2.2 billion tons of MSW/year by 2025 [35]), there is a trend toward a co-combustion of coal and various types of waste. Then, the presence of plastics can introduce organically-bound Cl into the combustion systems (e.g., in the form of polyvinylchloride (PVC)) [36][37][38]. If sewage sludge is co-combusted with coal, higher levels of ferric (iron(III)) chloride (FeCl 3 ) can be expected, and in the case of traditional MSW incineration the effect of NaCl originating from food residues should be taken into account as well [36].…”

Section: Effect Of Chlorine On Pb Behavior and Related Interactionsmentioning

confidence: 99%

“…Then, the presence of plastics can introduce organically-bound Cl into the combustion systems (e.g., in the form of polyvinylchloride (PVC)) [36][37][38]. If sewage sludge is co-combusted with coal, higher levels of ferric (iron(III)) chloride (FeCl 3 ) can be expected, and in the case of traditional MSW incineration the effect of NaCl originating from food residues should be taken into account as well [36]. Some occurrence of calcium chloride (CaCl 2 ) and aluminum (tri)chloride (AlCl 3 ) can also be expected in all the aforementioned cases.…”

Section: Effect Of Chlorine On Pb Behavior and Related Interactionsmentioning

confidence: 99%

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Behavior of Pb During Coal Combustion: An Overview

et al. 2019

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Despite the progress in understanding heavy metals behavior during coal combustion, mitigation of heavy metals emissions is still a tough challenge due to a complex character of this phenomenon. Several lists of potentially toxic elements have been presented; in most cases, Pb belongs to the elements with the greatest environmental and human-health concern. The review paper is focused upon the behavior of Pb during coal combustion. with particular attention paid to decreasing its emissions. It summarizes the dominant parameters affecting its redistribution among coal combustion streams. As gaseous emissions can quite easily pass through the particulate control device, attention was paid primarily to Pb distribution between condensed and volatilized phases. A crucial factor enhancing Pb volatility is the presence of organic or inorganic chlorides, which is discussed in detail, including their chlorination mechanisms and interactions with other fuel/flue gas species. Components decreasing Pb volatility and promoting the formation of condensed phases are also discussed (higher levels of moisture, Na, O2 etc.). Factors enhancing Pb volatility, as well as factors facilitating Pb retention, are discussed with the view of fluidized-bed combustion, pulverized-fuel combustion, or co-combustion of coal with wastes.

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Enrichment and distribution of 24 elements within the sub-sieve particle size distribution ranges of fly ash from wastes incinerator plants

Cited by 31 publications

References 32 publications

Distribution Characteristics of Valuable Elements, Al, Li, and Ga, and Rare Earth Elements in Feed Coal, Fly Ash, and Bottom Ash from a 300 MW Circulating Fluidized Bed Boiler

Distribution Characteristics of Valuable Elements, Al, Li, and Ga, and Rare Earth Elements in Feed Coal, Fly Ash, and Bottom Ash from a 300 MW Circulating Fluidized Bed Boiler

Behavior of Cd during Coal Combustion: An Overview

Behavior of Pb During Coal Combustion: An Overview

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