title: Supercritical Water as Nanomedium for Gasification of Lignite-Water Suspension.
abstract: The gasification of an aqueous suspension of lignite from Alexandria coalfield (Ukraine) under the supercritical pressure was studied. The initial rates of the formation of hydrogen, carbon dioxide and methane were evaluated. The mutually stimulating interaction of the components of "brown coal-water-mineral matter" system was shown due to the influence of nanoscaled water medium on the formation of dipole-inductive, dispersive and ionic associates. In the temperature range of 300-450 °C, the oxygen source for gaseous products of the lignite supercritical gasification is mainly ion-associative nanoclustered water. The source of hydrogen at the subcritical temperature is the organic part of brown coal. For the supercritical water, the source of H is the nanoscale medium with ion associates. The last ones were responsible for the further transformation of coal.
authors.affiliation: Institute of Bioorganic Chemistry and Petrochemistry of National Academy of Sciences of Ukraine, 1, Murmanska str., 02094, Kyiv, Ukraine. korzh.rw@gmail.com.
authors.forename: Raisa
authors.initials: R
authors.lastname: Korzh
authors.affiliation: Institute of Bioorganic Chemistry and Petrochemistry of National Academy of Sciences of Ukraine, 1, Murmanska str., 02094, Kyiv, Ukraine.
authors.forename: Valerii
authors.initials: V
authors.lastname: Bortyshevskyi
keywords: Ionic associates; Nanosized clusters; Supercritical fluids; Water-coal suspension gasification