The influence of impregnation by hydrocarbons on coal structure during its thermal evolution
type: Dataset
description: The present work analyses the changes in the chemical structure of a perhydrous coal during its thermal evolution at different temperatures in an open-medium pyrolysis system. The results obtained were compared with those described for non-perhydrous coals in order to establish the effect of the substances assimilated by the coal structure (hydrocarbon/oil-like substances) on the thermal evolution of the coal. The transformation ratio at each stage of thermal treatment was determined and the chemical-structural characterisation of the resultant products was performed. Changes in textural and microtextural properties associated with structural modifications during the evolution were also tested. The results obtained show that this perhydrous coal develops a specific evolution pathway different from that followed by non-perhydrous coals with a normal H/C ratio. The substances assimilated by the perhydrous coal cannot be easily and totally released from its structure so that they can be only partially removed after thermal treatment. Thus, the treatment debilitates the interactions between the substances and the coal matrix in addition to weakening and cracking the matrix during the thermal process. The increase in temperature also leads to the conversion of some of the heavy assimilated substances into lighter compounds. However, the assimilated substances are present even at high temperatures of the thermal process, providing hydrogen which has the effect of stabilising the radicals originated during the pyrolysis and improving the fluidity properties in the reacting medium.
issued: 2026-05-08T11:52:13.477052
language: en
modified: 2026-05-08T11:52:13.477056
contact point: Organization
  fn: CCSD
keyword: chemical-structure
keyword: coal
keyword: coal-strucutre
keyword: infoeu-reposemanticsarticle
keyword: journal-articles
keyword: perhydrous-vitrinite
keyword: physical-structure
keyword: pyrolysis
keyword: sdustugcsciences-of-the-universe-physicsearth-sciencesgeochemistry
keyword: thermal-evolution
landing page: 0165-2370

The influence of impregnation by hydrocarbons on coal structure during its thermal evolution
type: Distribution
format: HTML
issued: 2026-05-08T11:52:13.478397
modified: 2026-05-08T11:52:13.461394
access URL: https://insu.hal.science/hal-00089767

test_moissonnage_selune
type: Agent