Engineering a new material for hot gas cleanup | |
Wheelock, T.D. ; Doraiswamy, L.K. ; Constant, K. | |
Federal Energy Technology Center (U.S.) | |
关键词: Limestone; Heating; Sintering; 01 Coal, Lignite, And Peat; Pelletizing; | |
DOI : 10.2172/774915 RP-ID : DE--FG26-99FT40587-01 RP-ID : FG26-99FT40587 RP-ID : 774915 |
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美国|英语 | |
来源: UNT Digital Library | |
【 摘 要 】
The engineering development of a promising sorbent for desulfurizing hot coal gas was initiated and preliminary results are presented. The sorbent is calcium-based and is designed to be regenerated and reused repeatedly. It is prepared by pelletizing powdered limestone in a rotating drum pelletizer followed by the application of a coating which becomes a strong, porous shell upon further treatment. The resulting spherical pellets combine the high reactivity of lime with the strength of an inert protective shell. Preliminary work indicates that a satisfactory shell material is comprised of a mixture of ultrafine alumina powder, somewhat coarser alumina particles, and pulverized limestone which upon heating to 1,373 K (1,100 C) becomes a coherent solid through the mechanism of particle sintering. Several batches of core-in-shell pellets were prepared and tested with encouraging results.
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