40. Structural Changes of Coals by Organic Reactions under Mild Conditions

Abstract

The structure of coals, which were solubilized by H_2O_2 oxidation in ethanol was further altered by hydrogenation over a Ru catalyst. Pyrolysis and denitrogenation of the coal were investigated. The yield of nitrogen in the char was decreased, and that of N_2 in the gas phase was increased by the hydrogenation. Denitrogenation reactivity of the hydrogenated coals was enhanced by hydrogenation of heterocyclic rings in the coals.