COAL UPGRADING PROCESS UTILIZING NITROGEN AND CARBON DIOXIDE

摘要

A process of upgrading coal with carbon dioxide, comprising the steps of: providing a carbon dioxide-containing fluid having a carbon dioxide concentration greater than that of air; allowing the carbon dioxide-containing fluid to contact coal in a coal upgrading apparatus for a period of time, wherein the coal is not in a water slurry; allowing the carbon dioxide-containing fluid to be vented from the coal upgrading apparatus thereby removing at least some non-polar constituents from the coal.