Coal plasticity at high heating rates and temperatures

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Using a high temperature plastometer with a new cone-shaped shearing disk, the effect of shear rate ({gamma}R) on the apparent viscosity of softened coal was studied. For {gamma}R from 2.01 s{sup {minus}1} to 10.7 s{sup {minus}1}, no shear rate effect on the viscosity of Pittsburgh No. 8 high volatile bituminous coal was observed. Three other coals, each of different ranks ranging from high volatile bituminous to low volatile bituminous, were also studied. Although lower in tar and extractable yields than high volatile bituminous coals, medium and low volatile bituminous coals were found to be very plastic. Their good plastic behavior ... continued below

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Pages: (14 p)

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Gerjarusak, S.; Peters, W.A. & Howard, J.B. February 1, 1992.

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Description

Using a high temperature plastometer with a new cone-shaped shearing disk, the effect of shear rate ({gamma}R) on the apparent viscosity of softened coal was studied. For {gamma}R from 2.01 s{sup {minus}1} to 10.7 s{sup {minus}1}, no shear rate effect on the viscosity of Pittsburgh No. 8 high volatile bituminous coal was observed. Three other coals, each of different ranks ranging from high volatile bituminous to low volatile bituminous, were also studied. Although lower in tar and extractable yields than high volatile bituminous coals, medium and low volatile bituminous coals were found to be very plastic. Their good plastic behavior is therefore hypothesized to arise from their ability to generate higher molecular weight liquid fragments ( macrometaplast'') which are not represented by tar and extractable yields.

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Pages: (14 p)

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  • Other: DE92011909
  • Report No.: DOE/PC/89773-7
  • Report No.: FE-MIT--89773-7
  • Grant Number: FG22-89PC89773
  • DOI: 10.2172/5473570 | External Link
  • Office of Scientific & Technical Information Report Number: 5473570
  • Archival Resource Key: ark:/67531/metadc1093127

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  • February 1, 1992

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • Feb. 23, 2018, 12:37 p.m.

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Gerjarusak, S.; Peters, W.A. & Howard, J.B. Coal plasticity at high heating rates and temperatures, report, February 1, 1992; United States. (digital.library.unt.edu/ark:/67531/metadc1093127/: accessed June 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.