Actions for Optical properties of flyash. Quarterly report, 1 April--30 June 1989 [electronic resource].

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Optical properties of flyash. Quarterly report, 1 April--30 June 1989 [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1989.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
49 pages : digital, PDF file
Additional Creators
United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The purpose of this task is to validate the whole approach adopted in this program. Specifically, this bench-scale experiment is intended to compare the measured optical/radiative properties of a dispersion of well characterized ash with those calculated on the basis of the known size/composition distribution using the correlation formulae relating the composition and complex refractive index resulting from measurements on bulk samples of synthetic slag. Considerable thought has been given to the various possible approaches to satisfying the objectives of this task. Several experiments were done to guide our design of an apparatus for measuring the scattering and absorption properties of dispersions of flyash. As a result of these experiments, and from extensive prior experience in connection with research on electrostatic precipitation, it has been determined that there is no satisfactory way to satisfy the aims of this task using a gaseous dispersion of flyash because it is not possible to adequately disperse and deagglomerate flyash into a gas stream. Unless the ash is adequately dispersed, as it exists in the radiant boiler of a pulverized coal-fired combustion system, one cannot expect calculations, based on Mie calculations for a dispersion of spheres to properly agree with laboratory measurements. For these reasons, our design efforts are based on making measurements on a dispersion of flyash in liquid, for which our experience shows we can obtain stable, well-deagglomerated dispersions of ash. Because there is not single liquid which is adequately transparent over the wavelength range 1--12 μm, we plan to use a combination of three liquids, C Cl₄, C S₂ and bromoform to cover the full range. Windows of BaF₂ will be used to contain the liquid suspension in an absorption/scattering cell.
Report Numbers
E 1.99:doe/pc/79903--t17
doe/pc/79903--t17
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
07/01/1989.
"doe/pc/79903--t17"
"DE93001870"
Self, S.A.
Stanford Univ., CA (United States). High Temperature Gasdynamics Lab.
Type of Report and Period Covered Note
Quarterly; 04/01/1989 - 06/30/1989
Funding Information
AC22-87PC79903
View MARC record | catkey: 13838874