Characterization of Fly Ash from Polish Coal-Fired
CHP Plants for NO2 Capture

Ściubidło, Aleksandra; Majchrzak‐Kucęba, Izabela; Nowak, Wojciech

doi:10.15244/pjoes/94997

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…The recorded isotherms for FA_hardcoal1/scr, FA_hardcoal2/sncr, and FA_hardcoal3 samples, shown in panels a−c of Figure 6, are between types II and IV, according to the International Energy & Fuels Union of Pure and Applied Chemistry (IUPAC) adsorption isotherm classification. 33,34 That implies that our ashes exhibit the properties of both mesoporous (interparticle pores) and microporous (pores located in the slits of individual grains) materials. Hysteresis loops visible in the adsorption− desorption isotherms for the measured samples can be used to determine the fly ash pore shape based on the IUPAC classification.…”

Section: Methodsmentioning

confidence: 95%

“…Therefore, for samples FA_hardcoal1/scr and FA_hardcoal2/sncr, the hysteresis loop (panels a and b of Figure 6) is significantly more visible than it can be seen for the sample FA_hardcoal3 (Figure 6c) and is similar to type III (H3) hysteresis (on the basis of IUPAC classification). 33,34 This type of hysteresis loop characterizes slit-shaped pores. In turn, narrow slit pores suggested by the type IV (H4) hysteresis loop are characteristic of the FA_hardcoal3 sample, as inferred from the corresponding BET isotherm (Figure 6c).…”

Section: Methodsmentioning

confidence: 99%

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Key Parameters of Fly Ashes Generated from the Industrial Energy Sector Decisive for Their Pro-ecological Applications

et al. 2020

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Fly ashes belong to important byproducts, accompanying industrial energy production based on combustion technologies. Dependent upon the nature and characteristics of the used fuels as well as combustion technologies and their conditions, fly ashes may exhibit different physicochemical properties, limiting their potential applications as raw materials. A burned hard coal, lignite, biomass, or heavy fuel oil may generate fly ashes of various chemical, mineral, and phase characteristics. Both process conditions and humidity can, in turn, strongly influence final textural properties of such materials. Exhaust gas cleaning technologies also cannot be neglected as important factors potentially affecting textural and functional properties of the fly ashes. For example, denitrification processes, where NH3 is used as a reducer, can result in the so-called ammonia slip, when excessive, unreacted ammonia undergoes sorption on ash grains, forming the corresponding ammonia salts. Such undesired effects can be problematic for the consecutive use of fly ashes as raw materials or components. The current work was focused on an in-depth analysis of chemical, mineral, and phase compositions of fly ashes of various origin. Their structural, textural, and functional characterizations have been performed by means of X-ray fluorescence, X-ray diffraction, scanning electron microscopy–energy-dispersive X-ray spectroscopy, Brunauer–Emmett–Teller method, Raman and diffuse reflectance infrared Fourier transform spectroscopies. The concentration of NH3(aq) in aqueous effluents was determined by ultraviolet–visible spectrophotometry. On the basis of the obtained results, a hierarchical algorithm for selecting the most important parameters for industrial-scale pro-ecological applications was proposed. The ratio of Si/Al, the main constitutive elements of fly ashes, both content and speciation of iron and/or other transition metals, occurrence of alkali components and carbonaceous residuals, content of ammonia, mineral and phase compositions, grain diameters and morphology, and sorptive affinity of water to surfaces of ashes were selected as crucial parameters, remaining decisive for the successful exploitation of ashes as raw materials.

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Section: Methodsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

Key Parameters of Fly Ashes Generated from the Industrial Energy Sector Decisive for Their Pro-ecological Applications

et al. 2020

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“…This problem is intensified in the winter during the heating season. Depending on the quality of coal, fresh ashes contain 2.95–33.25% of CaO [ 103 ]. When fresh, these are strongly alkalising compounds.…”

Section: Discussionmentioning

confidence: 99%

Biotic and abiotic factors causing the collapse of Robinia pseudoacacia L. veteran trees in urban environments

et al. 2021

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Robinia pseudoacacia L. is an interesting example of how one plant species can be considered invasive or useful depending on its environment. In the past this tree species was planted for decorative purposes and for wood in Poland. For many years it was recommended in poor and degraded habitats because it facilitated late-successional plant species. The aim of this study was to verify if black locust can still be regarded as a resistant tree species in urban greenery. The health condition of old tree specimens growing along streets and in parks was compared. The occurrence of pests and pathogens on R. pseudoacacia trees was assessed and the content of mineral elements in leaves was examined. The research results showed that the health of black locust trees growing in the urban environment in Polish cities, especially along streets (in comparison to park sites), deteriorated significantly due to the interaction of harmful biotic and abiotic factors. Increased level of toxic metals (Fe, Zn, Pb, Mn and Cd) in plant tissues and the accumulation of pests and pathogens negatively influenced the health of R. pseudoacacia.

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Synthesis, Characterization and Properties of Fly Ash Based Geopolymer Materials

Das

Rout

2021

J. of Materi Eng and Perform

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Characterization of Fly Ash from Polish Coal-Fired CHP Plants for NO2 Capture

Cited by 6 publications

References 33 publications

Key Parameters of Fly Ashes Generated from the Industrial Energy Sector Decisive for Their Pro-ecological Applications

Key Parameters of Fly Ashes Generated from the Industrial Energy Sector Decisive for Their Pro-ecological Applications

Biotic and abiotic factors causing the collapse of Robinia pseudoacacia L. veteran trees in urban environments

Synthesis, Characterization and Properties of Fly Ash Based Geopolymer Materials

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