Size and shape of a coal asphaltene studied by viscosity and diffusion coefficient measurements

Verina J. Wargadalam, Koyo Norinaga, Masashi Iino

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

Hydrodynamic properties, such as intrinsic viscosity and diffusivity, were measured to investigate the solution state characteristics of coal-derived materials in three organic solvents: toluene, pyridine, and N-methyl-2-pyrolidinone. A coal-derived asphaltene was prepared using coal liquefaction residue and was used as the solute. The translational diffusion coefficient of the coal-derived asphaltene was determined using the Taylor dispersion technique. The sphere equivalent hydrodynamic radius of the coal asphaltene was estimated to be 0.6-0.8nm, depending on the solvent. The combined intrinsic viscosity and diffusion coefficient data suggest that the shape of coal asphaltene can be modeled as a prolate ellipsoid.

Original languageEnglish
Pages (from-to)1403-1407
Number of pages5
JournalFuel
Volume81
Issue number11-12
DOIs
Publication statusPublished - Jul 8 2002

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Coal
Viscosity
Hydrodynamics
Phosmet
Coal liquefaction
Toluene
Pyridine
Organic solvents
asphaltene

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Cite this

Size and shape of a coal asphaltene studied by viscosity and diffusion coefficient measurements. / Wargadalam, Verina J.; Norinaga, Koyo; Iino, Masashi.

In: Fuel, Vol. 81, No. 11-12, 08.07.2002, p. 1403-1407.

Research output: Contribution to journalArticle

Wargadalam, Verina J. ; Norinaga, Koyo ; Iino, Masashi. / Size and shape of a coal asphaltene studied by viscosity and diffusion coefficient measurements. In: Fuel. 2002 ; Vol. 81, No. 11-12. pp. 1403-1407.
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