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- W276796564 abstract "Conditioning of coal in steam is being explored for the purpose of improving the yield and quality of condensable product obtainable in the mild gasification of coal. Yields of volatiles released during both steam and helium conditioning were determined for Illinois No. 6 coal and Mississippi lignite using weight loss measurements. Previously reported extraction yields for Illinois No. 6 coal were recalculated using the new data. A suprising new conditioning regime of considerable potential importance has been (tentatively) discovered for Illinois No. 6 coal at atmospheric pressure and temperatures between 518 and 644/degree/F (270 and 340/degree/C). Mild gasification of Illinois No. 6 coal was studied at 750 psia in the semicontinuous reactor system. The high liquid yields previously obtained after steam conditioning with this reactor operated in the injection mode are not now being realized with this reactor operating in the semicontinuous mode. The recovery and analytical methods were reexamined and the total recovery improved, from 90 wt % or less, to 92 to 96 wt %. A series of runs made using the same amount of coal as that fed in the injection mode did not give the improved yields. The possibility that helium flowing through the feed tubemore » prevents access of steam to the reacting coal will be examined. Substantial progress has been made on the construction of the fluidized bed mild gasification test facility.« less" @default.
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- W276796564 date "1987-01-01" @default.
- W276796564 modified "2023-09-27" @default.
- W276796564 title "Steam conditioning of coal for snyfuels productions: Third quarterly report, July 1-September 30, 1987" @default.
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