Formation of Hydrogen without COx from Carbon, Water, and Alkali Hydroxide

Hydrogen without CO or CO 2 was produced through the reaction of carbons with water and NaOH. Carbon black reacted with NaOH in the presence of water vapor at temperatures > 700 K to form CO x -free hydrogen and Na 2 CO 3, whereas carbon black was gasified with water vapor in the absence of NaOH at temperatures > 900 K to form CO and hydrogen. Therefore, hydrogen was produced according to the following equation: C + 2NaOH + H 2 O → Na 2 CO 3 + 2H 2 . Alkali hydroxides (LiOH, KOH, and RbOH) other than NaOH also promoted the formation of CO x -free hydrogen at temperatures > 700 K through the reaction of carbon black and water vapor. Hydrogen formation through the reaction of carbon black, alkali hydroxides, and water vapor was enhanced by the addition of Al 2 O 3, TiO 2, MnO 2, V 2 O 5, CeO 2, Rh metal, and Ru metal.