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- W64351460 abstract "As a part of a program for the evaluation of gasifier feedstocks which includes examining the coking properties at simulated gasifier conditions, a pressurized Gieseler Plastometer was designed and built. This apparatus has been used to study the effect of nitrogen and hydrogen pressure on the fluidity of a Pittsburgh No. 8 seam coal. In order to estimate the viscosity of the coal in its liquid state, the plastometer crucible and stirrer were calibrated with viscosity standards and regarding this coal as a Neutonian liquid with a pseudo-viscosity, eta (poise), a relationship was developed between eta and the fluidity of the coal that indicated the apparent viscosity of the coal at the temperature of its maximum fluidity lies between 170 and 2000 poise. Increased fluidity was noted for increasing pressure of both hydrogen and nitrogen, but the leveling off of fluidity at nitrogen pressures greater than 100 psig is interpreted as evidence that the pressure is sufficient to retard the escape of volatiles until the coal has reached its temperature of maximum fluidity. Dramatic increase of fluidity with continued increase of hydrogen pressure is probably due to relations between hydrogen and components as well as retardation of escape of volatiles.more » While gas pressure had a major effect on fluidity of the coal, temperature of maximum fluidity (435 +- 5/sup 0/C) seemed to be independent of the pressure. (BLM)« less" @default.
- W64351460 created "2016-06-24" @default.
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- W64351460 date "1981-01-01" @default.
- W64351460 modified "2023-09-26" @default.
- W64351460 title "Effect of pressure and gas composition on the fluidity of Pittsburgh No. 8 coal" @default.
- W64351460 hasPublicationYear "1981" @default.
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