Large amount of glycerol has been generated as a byproduct in the synthesis of biodiesel fuel and their effective utilization ways have been explored. Our previous studies have shown that addition of glycerol effectively enchanced photocatalytic hydrogen evolution. In this study, we investigated photocatalytic reforming of glycerol aqueous solution under sonication. In photocatalytic reforming of glycerol aqueous solution, hydrogen and carbon dioxide mainly evolved. On the other hand, in the presence of sonication, a large amount of carbon monoxide evolved but hydrogen and carbon dioxide decreased, which can be explained by contribution of sonochemically generated hydroxyl radicals.
