Water adsorption and small angle X-ray scattering studies on the effect of coal thermal treatment

A. Ch Mitropoulos*, J. M. Haynes, R. M. Richardson, T. A. Steriotis, A. K. Stubos, N. K. Kanellopoulos

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

15 Citations (Scopus)

Abstract

The effect of thermal treatment, at a relatively high temperature (≃ 340 C). on two high-volatile bituminous coals is examined by water adsorption and small angle X-ray scattering (SAXS). The results suggest that the mesopore structure in both samples undergoes a partial collapse. Furthermore, a strong hydrophobic effect, at the very early stages of the adsorption process, is noted for only one of them. This observation is attributed to differences in the rigidity of each of the structures. Analysis of the spectra in terms of fractal geometry is also performed. It is proposed that thermal treatment changes the coal matrices from a dilute to a dense configuration. Heating causes a breakage of some oxygen and sulphur bridges giving rise to these structural alterations.

Original languageEnglish
Pages (from-to)775-781
Number of pages7
JournalCarbon
Volume34
Issue number6
DOIs
Publication statusPublished - 1 Jan 1996

Keywords

  • Bituminous coal
  • Small angle X-ray scattering
  • Thermal treatment
  • Water adsorption

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