Advanced development of a pressurized ash agglomerating fluidized-bed coal gasification system. Quarterly progress report, April 1-June 30, 1982 Page: 100 of 105
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A 20-pound sample of antistatic polyethylene resin was received from the
Richmond Division of Dixico, Inc. These pellets were shipped to Air Products
and Chemicals, Inc., to be crushed cryogenically into particles with a mean
particle size of about 100 um. Most of this 3-pound sample received
consisted of particles larger than 100 mesh (150 um) and only 60 g fell in
the range between 74 and 150 um. This quantity will probably be enough to
initiate the experiments. The small quantity of crushed material within the
needed size range was probably a result of the resins being crushed
cryogenically in a hammer mill and not in a grinder. A new sample of 250
pounds of the antistatic resin was ordered and is expected soon. This
material will be sent for cryogenic crushing in a grinder. Two service
companies with such facilities were contacted: Midwest Elastomers, inc., in
Wapakoneta, Ohio, and Specialty Recycling Services, in Cleveland, Ohio.
Modifications to the existing 12-inch Plexiglas semicircular test apparatus
were completed as follows:
" The high performance cyclone was installed.
* A cyclone dipleg with a transparent, Plexiglas lower section was
constructed and installed.
* A few trial tracer injection tests were conducted to select the size of
the tracer particle injection tube and to determine the corresponding
air-pressure needed for the instantaneous discharge of the tracers.
7.1.3 CFSF SUPPORT
The objective of this task is to provide technical support to the operation of
the CFSF and its data analysis. A program to develop one or more probes for
measuring the solid circulation rate in the CFSF was initiated. Preliminary
conception of the probes was completed, and two prototype probes are being
fabricated. The probe will be tested in the 12-inch diameter laboratory cold
flow model. One or more final probes suitable for application in the CFSF
will be developed.
7.2 COAL/ASH BEHAVIOR
The objective of this task is to characterize coals for reactivity using coke
breeze as a reference. Western Kentucky and Upper Freeport coals and PDU char
fines with RSA coal feedstock were characterized for reactivity on a
The average reactivities and proximate analyses of various coals and chars
tested in this period are given in Table 7-1.
The size fraction of -0.125 + 0.105 mm (-120 + 140 mesh) from RSA coal was
characterized by preparing char in a N2-H2 atmosphere. The average
relative reactivity of these fines was found to be 17.6. This result compares
very well with the value of 22.4 obtained for PDU char (-1.0 + 0.25 mm) trom a
test with RSA coal. From these tests it is concluded that the reactivity of
fines is the same as that of the larger size distribution (-1.0 + 0.25 mm).
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Advanced development of a pressurized ash agglomerating fluidized-bed coal gasification system. Quarterly progress report, April 1-June 30, 1982, report, October 21, 1982; United States. (https://digital.library.unt.edu/ark:/67531/metadc1058542/m1/100/: accessed May 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.