Hydrogen exchange reactions of four Argonne coals (Illinois No.6, Upper Freeport, Pocahontas #3 and Beulah-Zap) and Wandoan coal with tritiated toluene were performed at several temperatures. The hydrogen exchange ratios of coals with toluene were determined from the radioactivity of tritium introduced into coal. Further, in order to predict positions of exchangeable hydrogen in coal, the hydrogen exchange reactions between coal reacted with tritiated toluene and water were performed.
