Elemental characterization of coal, fly ash, and bottom ash using an energy dispersive X-ray fluorescence technique

2014 ◽  
Vol 90 ◽  
pp. 53-57 ◽  
Author(s):  
M. Tiwari ◽  
S.K. Sahu ◽  
R.C. Bhangare ◽  
P.Y. Ajmal ◽  
G.G. Pandit
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Bottom Ash ◽  
Energy Dispersive ◽  
Fluorescence Technique ◽  
X Ray ◽  
Elemental Characterization

Characterization of North American Lignite Fly Ashes II. XRD Mineralogy

1987 ◽  
Vol 113 ◽  
Author(s):  
G. J. McCarthy ◽  
D. M. Johansen ◽  
A. Thedchanamoorthy ◽  
S. J. Steinwand ◽  
K. D. Swanson
Keyword(s):  
Fly Ash ◽  
Bituminous Coal ◽  
Coal Fly Ash ◽  
Fly Ashes ◽  
X Ray ◽  
Mining Areas ◽  
Lignite Fly Ash ◽  
Coal Fly Ashes ◽  
Ferrite Spinel

ABSTRACTX-ray powder diffraction has been used to determine the crystalline phase mineralogy in samples of fly ash from each of the lignite mining areas of North America. The characteristic phases of North Dakota lignite fly ashes were periclase, lime, merwinite and the sulfate phases anhydrite, thenardite and a sodalite-structure phase. Mullite was absent in these low-Al2O3 ashes. Montana lignite ash mineralogy had characteristics of ND lignite and MT subbituminous coal fly ashes; mullite and C3A were present and the alkali sulfates were absent. Texas and Louisiana lignite fly ashes had the characteristic mineralogy of bituminous coal fly ash: quartz, mullite, ferrite-spinel (magnetite) and minor hematite. Even though their analytical CaO contents were 7–14%, all but one lacked crystalline CaO-containing phases. Lignite fly ashes from Saskatchewan were generally the least crystalline of those studied and had a mineralogy consisting of quartz, mullite, ferrite spinel and periclase. Quantitative XRD data were obtained. The position of the diffuse scattering maximum in the x-ray diffractograms was indicative of the glass composition of the lignite fly ash.

Microvolume Analysis of Fly Ash by Synchrotron Radiation X-ray Fluorescence (SRXRF) and Electron Microprobe X-ray Microanalysis (EPXMA)

1989 ◽  
Vol 33 ◽  
pp. 673-678
Author(s):  
Sz. Török ◽  
Sz. Sándor ◽  
H. Rausch
Keyword(s):  
Fly Ash ◽  
Coal Combustion ◽  
Coal Fly Ash ◽  
Chemical Characterization ◽  
Particulate Material ◽  
Toxic Trace Elements ◽  
X Ray ◽  
Toxicological Effects ◽  
Physical And Chemical

The assessment of the potential environmental and toxicological effects of particulate material emitted to the atmosphere requires detailed physical and chemical characterization of the particles. One of the most widely studied types of pollutant particles is coal fly ash as a byproduct of coal combustion. These particles are inhomogeneous, highly variable, span a broad range of sizes and have diverse morphologies.It has been shown that numerous toxic trace elements tend to increase in bulk concentrations with decreasing particle size (1).

scholarly journals Potensi Limbah Arang Kayu Alaban (Vitex pubescens Bahl), Abu Dasar dan Abu Terbang Batubara Sebagai Bahan Briket

2020 ◽  
Vol 17 (1) ◽  
pp. 59
Author(s):  
Ninis Hadi Haryanti ◽  
Suryajaya Suryajaya ◽  
Sadang Husain ◽  
Henri Wardhana ◽  
Yulia Anggraini ◽  
...  
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Bottom Ash ◽  
Calorific Value ◽  
Ash Content ◽  
Wood Charcoal ◽  
Average Moisture Content ◽  
Powder Size ◽  
Average Percentage

Characterization of wood waste from halaban wood, bottom ash, and coal fly ash has been done includes tests of water content, ash content, calorific value, and composition as well as morphology. One of the factors that influences the characteristics is the powder size. Therefore, this research uses 250 mesh sieve (smaller powder size) to make briquettes. From the test results, the average moisture content was 4.22% for halaban wood charcoal, 1.64% for bottom ash and 0.91% for fly ash. Average ash content of 41.93% for halaban wood charcoal, 82.03% for bottom ash and 89.69% for fly ash. Average Calorie Value of 6833.1 cal/g for halaban wood charcoal, 389.5 cal/g for bottom ash and for coal fly ash with calorie value of 0. From the SEM-EDX analysis results, there was no C mean of 76.69% In halaban wood charcoal, the average ash percentage of C was 41.87% and the average percentage of C was 16.17% in coal fly ash. The results of tests carried out are expected to be waste wood charcoal, basic ash and fly ash can be used as a mixture in the manufacture of briquettes.

Elemental characterization of coal fly ash using k0-based IM-NAA and EDXRF towards its potential utilization and environmental concern

2020 ◽  
Vol 324 (3) ◽  
pp. 1089-1097 ◽  
Author(s):  
Manish Chand ◽  
R. Senthilvadivu ◽  
J. S. Brahmaji Rao ◽  
G. V. S. Ashok Kumar ◽  
R. Kumar
Keyword(s):  
Fly Ash ◽  
Environmental Concern ◽  
Coal Fly Ash ◽  
Elemental Characterization

scholarly journals Review of the Reuse Possibilities Concerning Ash Residues from Thermal Process in a Medium-Sized Urban System in Northern Italy

2020 ◽  
Vol 12 (10) ◽  
pp. 4193 ◽  
Author(s):  
Ahmad Assi ◽  
Fabjola Bilo ◽  
Alessandra Zanoletti ◽  
Jessica Ponti ◽  
Andrea Valsesia ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Urban System ◽  
Silica Content ◽  
Northern Italy ◽  
Toxic Waste ◽  
Inert Material ◽  
X Ray

This review paper reports a detailed characterization of some combustion or incineration residues and by-products produced in a medium-sized city in Northern Italy. The municipal solid waste incineration (MSWI) generates fly ash, which is a toxic waste. Coal fly ash (CFA) and flue gas desulfurization (FGD) derive from the thermoelectric coal plant located in the same city. Along with these ashes, silica fume and rice husk ash are also considered for the stabilization of fly ash based on their amorphous silica content with the aim to convert them into an inert material. The characterization of all the investigated ashes was performed using different techniques: X-ray diffraction, total reflection X-ray fluorescence, scanning electron microscopy, and transmission electron microscopy. The aim of this work is to describe the reuse possibilities that were proposed for these ashes, which were determined also on the basis of their structural properties. Several possible applications of the investigated ashes are proposed, and the most suitable reuse of stabilized fly ash samples seems to be the production of sustainable plastic composites. This paper shows that the reuse of the by-product materials can allow natural resources to be preserved following the principles of a circular economy.

Characterization of lead-bearing phases in municipal waste combustor fly ash

1996 ◽  
Vol 54 ◽  
pp. 516-517
Author(s):  
L. L. Sutter ◽  
G. R. Dewey ◽  
J. F. Sandell
Keyword(s):  
Fly Ash ◽  
Bottom Ash ◽  
Municipal Waste ◽  
Primary Concern ◽  
Leaching Behavior ◽  
Waste Combustion ◽  
Lead And Cadmium ◽  
Lead Speciation ◽  
Accepted Practice

Municipal waste combustion typically involves both energy recovery as well as volume reduction of municipal solid waste prior to landfilling. However, due to environmental concerns, municipal waste combustion (MWC) has not been a widely accepted practice. A primary concern is the leaching behavior of MWC ash when it is stored in a landfill. The ash consists of a finely divided fly ash fraction (10% by volume) and a coarser bottom ash (90% by volume). Typically, MWC fly ash fails tests used to evaluate leaching behavior due to high amounts of soluble lead and cadmium species. The focus of this study was to identify specific lead bearing phases in MWC fly ash. Detailed information regarding lead speciation is necessary to completely understand the leaching behavior of MWC ash.

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