Chemical and Morphological Properties of Particulate Matter Generated from Coal-fired Circulating Fluidized Bed Boiler

Bai, Hao; Ma, Yan; Ai, Xianbin; Li, Haiguang; Liu, Pu; Cang, Daqiang

doi:10.1109/icmtma.2011.179

Cited by 4 publications

(6 citation statements)

References 4 publications

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“…Coal combustion processes give rise to different morphologies (15). In this sense, CFCs are characterized by being granular with an irregular hexagon structure and visibly porous (13, 26 -28).…”

Section: Morphology Of Cfcsmentioning

confidence: 99%

“…Among the residues from coal combustion, there is particulate matter (PM), with different physical, chemical, morphological, and biological characteristics (2). PM is classified into sub-micrometric particles with an aerodynamic diameter of less than 1 micron and micrometric particles with an aerodynamic diameter greater than 1 micron and less than 10 microns (15). In this sense, the most common waste is bottom ash (CFC) and fly ash (CVC) rich in minerals, heavy metals such as As, Pb, Hg, Cd, Cr, Sb, and radioactive elements that are preserved in the combustion of carbon as they are indestructible elements in the process (5,7).…”

Section: Introductionmentioning

confidence: 99%

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Evaluación de material particulado en cenizas de fondo de carbón y sus posibles efectos ecotóxicos: estudio preliminar

Torres Agredo,

Agudelo-Morales,

Vallejo Vallejo

2024

inycomp

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Las actividades industriales que utilizan carbón como fuente de energía, generan cantidades considerables de residuos sólidos que afectan la dinámica natural del ambiente, así como a la salud humana. Entre los residuos generados se encuentran las cenizas de fondo de carbón, las cuales podrían generar efectos adversos en la salud humana, especialmente por afecciones respiratorias. En este sentido se presenta una caracterización física (tamaño de partícula), química y ambiental, de cenizas de fondo generadas a partir de la combustión del carbón en una industria colombiana. Las técnicas empleadas para el análisis de tamaño de partícula fueron microscopía electrónica de barrido (SEM), microscopía electrónica de transmisión (TEM) y microscopía óptica, donde se observa material particulado de interés ambiental PM10 y PM2.5. También se realizó un análisis químico a través de la técnica de Fluorescencia de Rayos X y un análisis termogravimétrico con el fin de determinar el contenido de carbón inquemado. Adicionalmente, se realizó un bioensayo con semillas de Vigna radiata el cual indicó una reducción de la radícula, siendo más notoria en concentración de 50 % al 100% de ceniza. En las cenizas estudiadas, se encontraron partículas a escala de micras y nanómetros que podrían generar efectos negativos en la salud por su inhalación; así como contenido de metales pesados y compuestos de cuidado por su potencial riesgo a la salud y al ambiente.

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Section: Morphology Of Cfcsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluación de material particulado en cenizas de fondo de carbón y sus posibles efectos ecotóxicos: estudio preliminar

Torres Agredo,

Agudelo-Morales,

Vallejo Vallejo

2024

inycomp

View full text Add to dashboard Cite

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“…Source-apportionment studies have identified residential coal burning as the greatest single source of airborne aerosols among other pollutants in South Africa's coal-burning townships [5][6][7]. Due to the health effects of fine and ultrafine particulate matter, emissions from coal combustion are receiving significant attention, from both regulatory authorities and environmental scientists [8][9][10][11][12]. Consequently, fine particulate formation mechanisms and partitioning, as well as factors influencing these need to be studied in detail in order to develop novel technologies that are less polluting [8].…”

Section: Introductionmentioning

confidence: 99%

Influence of fuel-bed temperatures on CO and condensed matter emissions from packed-bed residential coal combustion

Makonese

Masekameni

Annegarn

et al. 2015

2015 International Conference on the Domestic Use of Energy (DUE)

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In this paper, the influence of fife-ignition methods (which detennine the progression of the pyrolytic zone) and combustion temperatures on CO and condensed matter (smoke) emissions during fixed-bed coal combustion were investigated in a typical informal brazier/imbaula. Particle and gaseous samples were drawn from the exhaust through a rapid dilution sampling system (the SeTAR dilution system) before being channelled to respective gas and particle analysers. Particle morphologies and chemical composition of the particles were investigated by a VEGA3 SEM unit with EDS. Results showed that the propagation of bed temperatures in fixed-bed residential combustion has an influence on the characteristics of CO and PMlO emissions. Temperature stratification was found to depend on the fire-ignition methods. The top-lit up-draft (TLUD) fife-ignition method produced less emissions compared to bottom-lit up-draft (BLVD) fire-ignition method. Bed temperatures and the propagation front have an impact on aerosol formation and can highlight differences in the morphology of the emitted particles and the modes of formation. Increasing combustion temperature yields a decrease in emissions liquid "tarry" substances and super-aggregates (> I 0 f..l m)but also leads to an increase in emissions of sub-micron soot particles. This work is significant in that there is still scarce infonnation available in literature on fuel-bed temperature profiles/stratification for packed-bed residential coal-burning devices.

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“…Residential solid-fuel combustion in the developing world has been identified as a significant source of carbonaceous aerosols, fine particle mass emissions, particulate polycyclic aromatic hydrocarbons and gaseous pollutants such as volatile organic compounds [16,17]. Fine and ultrafine particulate matter emissions from biomass combustion are receiving significant attention from both regulatory authorities and environmental scientists because of their effects on health [18][19] and the environment, especially concerning radiative forcing [20,21].…”

Section: Introductionmentioning

confidence: 99%

Design and performance evaluation of wood-burning cookstoves for low-income households in South Africa

Makonese

Bradnum

2018

J. energy South. Afr.

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Many cookstove programmes implemented around the world aimed to reduce fuel consumption and pollutant emissions through the dissemination and adoption of improved cookstoves. A study was carried out for the design of wood-burning cookstoves for low-income households in South Africa by employing user-centred design and co-design/cocreation approaches. Six designed variants of the biomass stove were constructed. Water-heating and emissions tests, using black wattle wood, were conducted to evaluate them for thermal and emissions performance. The large hopper stove with two secondary air inlets ranked highest, with best performance regarding thermal and emissions parameters. It outperformed the small hopper stove in time to boil, heat flux and firepower, although the latter had higher thermal efficiency values. Fuel consumption rates were high in large hopper stoves compared with small hopper stoves, resulting in increased firepower. The experimental work showed the need for iterative designing and testing of cookstoves for emissions and thermal performance to identify efficient and less polluting candi-date stoves for dissemination in low-income communities.

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Chemical and Morphological Properties of Particulate Matter Generated from Coal-fired Circulating Fluidized Bed Boiler

Cited by 4 publications

References 4 publications

Evaluación de material particulado en cenizas de fondo de carbón y sus posibles efectos ecotóxicos: estudio preliminar

Evaluación de material particulado en cenizas de fondo de carbón y sus posibles efectos ecotóxicos: estudio preliminar

Influence of fuel-bed temperatures on CO and condensed matter emissions from packed-bed residential coal combustion

Design and performance evaluation of wood-burning cookstoves for low-income households in South Africa

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