Vapour Sorption on Coal: Influence of Polarity and Rank

The surface properties of coal, interactions with gaseous and vapour media, knowledge the pore structure are important in terms preparation, use, utilisation coal. This publication combines new unpublished data analyses included earlier publications by research team to expand systematise information on sorption water vapour, methanol saturated unsaturated hydrocarbons hexane, 1-hexene, heptane, 1-heptene, octane coals different ranks. study showed that affinity coal for is related content oxygen rather than rank Water a multilayer phenomenon, while monolayer phenomenon. greater low-rank but higher-rank it opposite. capacity applied depends presence or absence double bond size molecule. It increases order: n-octane < n-heptane/n-hexane 1-heptene 1-hexene. effect dominant over influence length shape