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- W1982482554 abstract "An inverse liquid chromatography (ILC) technique was applied to evaluating the porous structure of coals. Swollen Morwell coal (C = 65 wt %, daf) or Pocahontas coal (C = 91 wt %, daf) particles were packed in a ILC column as the stationary phase, and n-hexane (HEX) or tetrahydrofuran (THF) was used as the mobile phase. For any combinations of coals and carrier solvents, n-alkanes of C 5 -C 22 that were used as the molecular probes eluted in the size-exclusion region. In the Pocahontas-HEX system, all probes eluted nearly at the size-exclusion limit. This indicates that there were few pores of 1-10 nm in that coal. In the Morwell-HEX and Morwell-THF systems, however, the elution volume was varied by the chain length of probes. Under the assumption that the elution was controlled by the steric-exclusion mechanism alone, the volume of pores into which pentane could penetrate was 0.04 and 0.83 cm 3 /g of coal for the Morwell-HEX and Morwell-THF systems, respectively. The swelling of Morwell coal by THF (swelling ratio = 2.15) created micro- and mesopores accessible to n-alkane molecules." @default.
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- W1982482554 date "1995-11-01" @default.
- W1982482554 modified "2023-09-23" @default.
- W1982482554 title "Examination of Change in Coal Gel Structure Due to Solvent Swelling by Size Exclusion Chromatography" @default.
- W1982482554 doi "https://doi.org/10.1021/ef00054a015" @default.
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