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Small Angle X Ray Scattering Study Of Coal Soot Formation
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Book Synopsis Small Angle X-ray Scattering Study of Coal Soot Formation by :
Download or read book Small Angle X-ray Scattering Study of Coal Soot Formation written by and published by . This book was released on 2000 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to examine, by small angle X-ray scattering (SAXS), the formation of soot from individual coal particle combustion in a methane flat flame burner. The SAXS instrument at the Basic Energy Sciences Synchrotron Radiation Center (BESSRC) at the Advanced Photon Source (APS) can be used to observe both the formation of spherules and clusters since it can access length scales of 6--6000 Å. The high X-ray flux enables rapid acquisition of scattering data of various regions of the flame. SAXS data reveal particle size, shape, surface areas, and surface roughness.
Book Synopsis An in-situ x-ray small angle scattering study of soot morphology in flames by : W. A. England
Download or read book An in-situ x-ray small angle scattering study of soot morphology in flames written by W. A. England and published by . This book was released on 1984 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatially-resolved Small-angle X-ray Scattering Studies of Soot Inception and Growth by :
Download or read book Spatially-resolved Small-angle X-ray Scattering Studies of Soot Inception and Growth written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high spectral brilliance of x-rays produced at the Basic Energy Sciences Synchrotron Radiation Center of Argonne's Advanced Photon Source allows us to perform small-angle x-ray scattering (SAXS) measurements of the distributions of soot particles in flames. SAXS provides an in situ probe of the size and distribution of particles in the region between 1 and 100 nm. Detailed measurements on a propylene/air diffusion flame allow us to extract a spatially dependent background, which occurs in gas-phase combustion systems, and to perform Abel inversions, which provide the radial dependence of the scattering intensity. A bimodal distribution of soot particles is needed to describe our results. The radial behavior of the two modes of this distribution implies that the chemistry and fluid dynamics are strongly coupled in this simple diffusion flame. The larger particles of this distribution correspond to the previously observed primary particles, which have a relatively complex radial dependence. Midway between the fuel source and the widest part of the flame the primary particles have a mean radius of 6 nm or less and their concentration is symmetrically distributed about the flame front. At the widest part of the flame, two distinct distributions of primary particles are observed. Near the center of the flame the particles have a mean radius of 10 nm and a polydispersity of 0.3 and beyond a transition region they have a mean radius of 21 nm and a polydispersity of 0.2. The smaller particles, which require additional experiments before they can be identified, correspond either to soot nuclei, PAH species such as naphthalene, and/or disordered carbons with graphitic basal planes.
Book Synopsis Wide-angle X-ray Scattering Study of the Effect of Organic Liquids on the Layering of Pittsburgh #8 Coal by : Eric Ryan Smith
Download or read book Wide-angle X-ray Scattering Study of the Effect of Organic Liquids on the Layering of Pittsburgh #8 Coal written by Eric Ryan Smith and published by . This book was released on 2002 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time Resolved Small Angle X-ray Scattering Reactivity Studies on Coals, Asphaltenes, and Polymers by :
Download or read book Time Resolved Small Angle X-ray Scattering Reactivity Studies on Coals, Asphaltenes, and Polymers written by and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to examine changes in the structures of coals, asphaltenes, and polymers in situ with small angle X-ray scattering (SAXS) during thermal treatments. We have built a SAXS instrument at the Basic Energy Sciences Synchrotrons Radiation Center at the Advanced Photon Source that allows us to obtain scattering data on very small samples and in the millisecond time domain. The Argonne Premium Coal samples, petroleum derived asphaltenes, and polymers with functionality to model fossil fuels were used in this study. The information that can be derived from these experiments includes: changes in fractal dimensionality, surface topology, and size and type of porosity. The information is correlated with other methods on the same samples.
Book Synopsis In Situ Small Angle X-ray Studies of Coal Gasification by :
Download or read book In Situ Small Angle X-ray Studies of Coal Gasification written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the progress made the first 12 months of a planned 36 month project on small angle x-ray studies of coal and char pore structure. Model carbon studies have been employed to demonstrate the usefulness of small angle x-ray scattering (SAXS) in monitoring the structural changes in porous carbonaceous materials during gasification. Scattering data from particles gasified to varying levels of conversion show increases in the micropore sizes with conversion. This is also supported by surface area measurements by SAXS showing a maximum at intermediate conversion in agreements with previous studies by conventional means. The application of SAXS to PSOC coal samples is also demonstrated. Existing models for the porous structure have been reviewed and percolation theory has been selected as a consistent framework for both the modelling and the data analysis. This theory will make it possible to describe the porous structure in terms of its geometry and connectivity, rather than being limited to a fixed geometry as in conventional approaches. Two graduate students and the PI have been trained in SAXS and the associated theory. Results from the model carbon studies have been published. 18 references, 9 figures, 2 tables.
Book Synopsis Small Angle X-Ray and Neutron Scattering with Applications to Geomaterials by : Yixin Zhao
Download or read book Small Angle X-Ray and Neutron Scattering with Applications to Geomaterials written by Yixin Zhao and published by Elsevier. This book was released on 2023-06-02 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small Angle X-Ray and Neutron Scattering with Applications to Geomaterials provides techniques for the analysis of geomaterials, which is of great significance for humans because geomaterials are related to earthquake, resource development, underground spaces, carbon dioxide storage, and more. The book introduces the fundamental theory of small angle X-ray and neutron scattering and covers pore accessibility characterization for natural rocks from four aspects, including quantitative evaluation of pore structure heterogeneity and anisotropy, quantification of pore modification in coals due to pulverization, estimation and modeling of coal pore accessibility, and nanoscale coal deformation and alteration of porosity and pore orientation under uniaxial compression. Finally, interactions between pore structures and fluid behaviors in geomaterials are introduced, along with the connections between small-angle scattering and other techniques (NMR cytophotometry, Transmission Electron Microscopy and synchrotron radiation SAXS and nano-CT) described. Covers both theory and applications of small angle X-ray and neutron scattering as related to geomaterials Provides context for using the techniques described in the book in connection with other well-known techniques Includes analysis methods of interactions between pore structures and fluid behaviors in geomaterials
Book Synopsis Small Angle X-ray Scattering from Lignite Coal by : Marvin L. Carlson
Download or read book Small Angle X-ray Scattering from Lignite Coal written by Marvin L. Carlson and published by . This book was released on 1983 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Small Angle X-ray Scattering by : O. Glatter
Download or read book Small Angle X-ray Scattering written by O. Glatter and published by . This book was released on 1982 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis X-ray Diagnostics in Combustion by :
Download or read book X-ray Diagnostics in Combustion written by and published by . This book was released on 2014 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Small Angle X-ray Scattering Study of Spherical Particles by : John Henry Letcher
Download or read book A Small Angle X-ray Scattering Study of Spherical Particles written by John Henry Letcher and published by . This book was released on 1964 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Office of the Assistant Secretary for Fossil Energy Publisher : ISBN 13 : Total Pages :212 pages Book Rating :4.:/5 (319 download)
Book Synopsis Fossil Energy Program Report by : United States. Office of the Assistant Secretary for Fossil Energy
Download or read book Fossil Energy Program Report written by United States. Office of the Assistant Secretary for Fossil Energy and published by . This book was released on 1977 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Small-angle X-ray Scattering by : Harry Brumberger
Download or read book Small-angle X-ray Scattering written by Harry Brumberger and published by . This book was released on 1967 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Small-angle X-ray Scattering Studies of the Porosity of Coals and Chars. Quarterly Progress Report, July 1-September 30, 1980 by :
Download or read book Small-angle X-ray Scattering Studies of the Porosity of Coals and Chars. Quarterly Progress Report, July 1-September 30, 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Considerable effort has been devoted to checking and verifying some of the preliminary data reported previously. The technique employed in the past for measuring the x-ray transmission of the samples has been modified to provide more accurate values of the transmission. These transmission measurements are important for quantitative interpretation of the scattering data both because they are needed to determine the amount of background scattering that must be subtracted from a measured scattering curve and also because the value of the transmission is required for calculating the specific surface from the scattering data. Previous determinations of the specific surface have been checked and modified when corrected transmission values made recalculation necessary. Evaluation of the specific surface from the scattering data also requires a measurement of the absolute scattered intensity, or scattering cross section. In other words, the fraction of the incident radiation which is scattered must be known. For this scattering investigation of coals, the absolute intensity for the scattering system was determined by measurement of the scattering from a colloidal silica suspension. The details of this technique are described by I.S. Patel and P.W. Schmidt, J. Appl. Cryst. 4, 50 to 55. (1971).
Book Synopsis Scattering of X-rays by Metals at Very Small Angles by : B. M. Rovinsky
Download or read book Scattering of X-rays by Metals at Very Small Angles written by B. M. Rovinsky and published by . This book was released on 1953 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1978 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis X-ray Studies of Coals and Carbonaceous Materials by : Sabri Ergun
Download or read book X-ray Studies of Coals and Carbonaceous Materials written by Sabri Ergun and published by . This book was released on 1969 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
