Oil shale - environmental side
Disposal and upgrading of the oil shale wastes by fluid- and gas-phase extraction in chemically active media Extensive utilization of the oil shale as the main natural resource of Estonia for oil and electricity production has been engendered millions of tons organomineral wastes and to those millions of tons are added every year. Semicoke, fusses and shale ash are oil shale wastes of different degree of technological transformation and contain different content of organic matter. In this fashion the oil shale wastes are unfit for use and hazardous ones and there is no technology for those re-utilization. Just the re-utilization of oil shale wastes is the clue question for continuation of the pre-existing technology of oil shale processing. The main goals of the present project are to work out novel and effective methods basing on sub- and supercritical extraction in chemically active media for separation the organic matter from fusses and semicoke as the liquid product in order to upg...