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4.4.6 TRDU Gasification Test P072
Test P072 was conducted during the weeks October 7-9, 2002, and October 21-25, 2002, with
an 11-day interruption caused by a gasket failure on the filter vessel tube sheet that seals the tube
sheet between the filter vessel flanges. This resulted in fuel gas leaking directly into the gasification
tower and forced a system shutdown. The run was restarted after the filter was cooled and the filter
gasket replaced. This test operated for 155 hours on coal feed with 145 hours in gasification,
including 20 hours in air-blown gasification and 125 hours in enriched air- or full oxygen-blown
gasification. This test utilized Illinois No. 6, Alabama bituminous coal from the Calumet Mine and,
for a short period, the high-swelling Pittsburgh No. 8 bituminous coal. Tables 23 and 24 show the
corrected and actual fuel gas composition for oxygen-blown testing and the operation conditions for
these selected tests on these fuels. All steady-state data from this test campaign are given in
Appendix A.
4.4.7 TRDU Gasification Test P073
TRDU Test P073 was conducted from the April 22 to April 30, 2003, time period. This test
generated 135 hours of coal feed with 120 hours of gasification, including 75 hours of air-blown
gasification and 45 hours of oxygen-blown gasification. This test utilized a high-swelling Pittsburgh
No. 8 bituminous coal from the Blacksville Mine exclusively. While this test generated a significant
number of hours, it was also subject to a much higher number of significant fluctuations in solids
circulation possibly because of the swelling properties of this coal. It was speculated that a layer of
sticky coal could build up on the wall opposite where the coal is injected and then spall off in large
enough agglomerates to cause the fluctuations in the circulation rates. Because of these fluctuations,
the amount of true steady-state data appears to be limited. Tables 25 and 26 show the product gas
composition and TRDU operating conditions and efficiency results for the high-swelling Pittsburgh
No. 8 bituminous coal from the Blacksville Mine in West Virginia. Table 27 shows the XRFA
analysis from bed material and filter ash samples generated during the gasification of the Blacksville
coal. Again, the data from all the identified steady-state periods are given in Appendix A.
4.4.8 TRDU Gasification Test P074
TRDU Test P074 was conducted during the week of September 22 through September 28,
2003. This test generated 81 hours of coal feed with 65 hours of gasification data. Of this testing,
48 hours was in air-blown operation, and 17 hours was in oxygen-blown operation. The first part of
this test attempted to test Australian brown coal from the Loy Yang Mine; however, steady-state
operation was difficult to obtain since this original 60% moisture coal could only be air-dried to
approximately 35%-40% moisture before testing was started. This fuel proved to be very difficult
to feed, so this testing was discontinued. The test was then completed on a 90 wt% Falkirk, North
Dakota, lignite and 10 wt% hog fuel wood waste feedstock. This testing represented the bulk
(44 hours) of the good steady-state operating results obtained during this test campaign. Tables 28
and 29 show some results from these gasification tests on the lignite/wood mixture in both air-blown
and oxygen-blown operation. Table 30 shows the ash chemistry from various bed material and filter
vessel samples taken during the testing of both the Falkirk lignite and the Falkirk lignite-10 wt%
wood mixture. This table shows that after 2 days of operation on the Falkirk-wood mixture, potential33
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Swanson, Michael L. Advanced High-Temperature, High-Pressure Transport Reactor Gasification, report, August 30, 2005; [Grand Forks, North Dakota]. (https://digital.library.unt.edu/ark:/67531/metadc889538/m1/45/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.