X-Ray Absorption Near Edge Structure Spectrometry Study of Nickel and Lead Speciation in Coals and Coal Combustion Products

2009 ◽  
Vol 23 (3) ◽  
pp. 1518-1525 ◽  
Author(s):  
Pushan Shah ◽  
Vladimir Strezov ◽  
Peter F. Nelson
Keyword(s):  
Coal Combustion ◽  
Combustion Products ◽  
Edge Structure ◽  
Coal Combustion Products ◽  
X Ray ◽  
Lead Speciation ◽  
X Ray Absorption

Mass Absorption Corrected X-ray Diffraction Analysis of Entrained-Flow Reactor Coal Combustion Products

1990 ◽  
Vol 34 ◽  
pp. 429-435
Author(s):  
Leo W. Collins ◽  
David L. Wertz
Keyword(s):  
Coal Combustion ◽  
Initial Phase ◽  
Flow Reactor ◽  
Combustion Process ◽  
Combustion Products ◽  
X Ray Diffraction ◽  
Coal Combustion Products ◽  
X Ray ◽  
Entrained Flow ◽  
Entrained Flow Reactor

AbstractThe analysis of coal and the understanding of the combustion process is complex, due to the heterogeneous nature of the material and the myriad of high-temperature reactions inherent in this fossil fuel. The research presented below utilizes recently-developed x-ray diffraction methods to analyze the coal combustion products generated from a laboratory-scale entrained-flow reactor. The reactor was designed, constructed, and tested, as planned for the initial phase of a long-term project to evaluate the coals located in Mississippi. In this initial phase a well-characterized coal was used, supplied by The Pennsylvania State University. The proximate, ultimate, and sulfur analyses of the coal, PSOC 1368p, are outlined in the Appendix. X-ray diffraction techniques have been used In the past to characterize coals. An analysis of the mineral transformation during coal combustion has also been performed using x-ray diffraction instrumentation. The semi-quantitative results of the pyrite (FeS2) phase transformation at variable temperatures and the percent combustion of the coal, as determined by x-ray methods are reported below.

Lead speciation of PM2.5 collected from Greater Cairo, Egypt and Zarqa, Jordan: An energy dispersive X-ray fluorescence and X-ray absorption near edge structure study

2018 ◽  
Vol 48 (1) ◽  
pp. 38-45 ◽  
Author(s):  
Abdallah A. Shaltout ◽  
Sameh I. Ahmed ◽  
Messaoud Harfouche ◽  
Salwa K. Hassan ◽  
Kamal A. Eid
Keyword(s):  
Structure Study ◽  
Energy Dispersive ◽  
Edge Structure ◽  
X Ray ◽  
Lead Speciation ◽  
Greater Cairo ◽  
X Ray Absorption

scholarly journals Mineralogical and Environmental Geochemistry of Coal Combustion Products from Shenhuo and Yihua Power Plants in Xinjiang Autonomous Region, Northwest China

Minerals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 496 ◽  
Author(s):  
Wu ◽  
Li ◽  
Zhuang ◽  
Querol ◽  
Moreno ◽  
...  
Keyword(s):  
Fly Ash ◽  
Coal Combustion ◽  
Inductively Coupled Plasma ◽  
Power Plants ◽  
Environmental Geochemistry ◽  
Combustion Products ◽  
Coal Combustion Products ◽  
X Ray ◽  
Inductively Coupled ◽  
Xinjiang Autonomous Region

The mineralogical and geochemical characteristics of feed coals and coal combustion products (CCPs) from the Shenhuo and Yihua Power Plants in Xinjiang Autonomous Region, were studied by means of proximate analysis, Power X-ray diffraction (XRD), scanning electron microscopy with Energy Dispersive X-ray analyzer (SEM-EDX), inductively coupled plasma atomic emission spectrometry (ICP-MS) and inductively coupled plasma mass spectrometry (ICP-AES). The environmental geochemistry of CCPs was evaluated by Al-normalized enrichment factor as well as European Standard EN-12457 leaching test. Two feed coals have the characteristics of low sulfur content, medium to high volatiles matter yields, medium moisture content, super low to medium ash yield, medium to high calorific value and low mineral content. The main crystalline facies in fly ash and slag are quartz and mullite, with a small amount of calcite, and some unburned carbon. Hematite, SrSO4 and barite also can be observed in fly ashes by SEM. Typical plerophere occurs in fine fly ash rather than the coarse fly ash. The concentration of most trace elements in CCPs falls within the lower concentration range of European fly ashes. With respect to the partitioning behavior of trace elements during coal combustion, S is highly volatile, and Mg, Na, Zn, B, Co, As, Nb, Zr, Cu and K also show certain volatility, which may to some extent emit to the atmosphere. Furthermore, leaching experiments show that leachable concentrations of most of the potentially toxic elements in CCPs are low, and the CCPs fall in the range between inert and nonhazardous landfill material regulated by the 2003/33/EC Decision.

X-ray Diffraction Examination of Coal Combustion Products Related to Boiler Tube Fouling and Slagging

1976 ◽  
Vol 20 ◽  
pp. 85-101
Author(s):  
M. H. Mazza ◽  
J. S. Wilson
Keyword(s):  
Coal Combustion ◽  
Analytical Techniques ◽  
Combustion Products ◽  
Mineral Matter ◽  
X Ray Diffraction ◽  
Energy Research ◽  
Coal Combustion Products ◽  
X Ray ◽  
Boiler Tubes ◽  
The Subject

The Morgantown Energy Research Center of ERDA is studying fouling and slagging of pulverized coal fired boiler tubes resulting from mineral matter contained in the coal. The research is dependent on the development and application of reliable analytical techniques which can be applied to the coal and ash products to determine the mineral interactions responsible for fouling and slagging. X-ray powder diffraction is one of the techniques used to characterize the feed coals and their combustion products. A summary of the methods and techniques applied at MERC is the subject of this paper.

Chemical and orientational imaging of polymeric samples

1994 ◽  
Vol 52 ◽  
pp. 68-69
Author(s):  
H. Ade ◽  
B. Hsiao ◽  
G. Mitchell ◽  
E. Rightor ◽  
A. P. Smith ◽  
...  
Keyword(s):  
Ethylene Terephthalate ◽  
National Laboratory ◽  
Brookhaven National Laboratory ◽  
Carbonyl Groups ◽  
Aromatic Rings ◽  
Edge Structure ◽  
X Ray ◽  
Scanning Transmission ◽  
Polymeric Samples ◽  
X Ray Absorption

We have used the Scanning Transmission X-ray Microscope at beamline X1A (X1-STXM) at Brookhaven National Laboratory (BNL) to acquire high resolution, chemical and orientation sensitive images of polymeric samples as well as point spectra from 0.1 μm areas. This sensitivity is achieved by exploiting the X-ray Absorption Near Edge Structure (XANES) of the carbon K edge. One of the most illustrative example of the chemical sensitivity achievable is provided by images of a polycarbonate/pol(ethylene terephthalate) (70/30 PC/PET) blend. Contrast reversal at high overall contrast is observed between images acquired at 285.36 and 285.69 eV (Fig. 1). Contrast in these images is achieved by exploring subtle differences between resonances associated with the π bonds (sp hybridization) of the aromatic groups of each polymer. PET has a split peak associated with these aromatic groups, due to the proximity of its carbonyl groups to its aromatic rings, whereas PC has only a single peak.

Full-Field Calcium K-Edge X-ray Absorption Near-Edge Structure Spectroscopy on Cortical Bone at the Micron-Scale: Polarization Effects Reveal Mineral Orientation

2016 ◽  
Vol 88 (7) ◽  
pp. 3826-3835 ◽  
Author(s):  
Bernhard Hesse ◽  
Murielle Salome ◽  
Hiram Castillo-Michel ◽  
Marine Cotte ◽  
Barbara Fayard ◽  
...  
Keyword(s):  
Cortical Bone ◽  
Edge Structure ◽  
Full Field ◽  
Polarization Effects ◽  
X Ray ◽  
X Ray Absorption
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