Production of H-2 by steam oxidation was demonstrated with calcium ferrite (CaFe2O4) after coal gasification to produce CO with several types of coals. All coal types reacted with CaFe2O4 to produce CO. The reduced CaFe2O4 after the reaction with coal can also be oxidized with steam at 800 degrees C while producing of H-2 . Sub-bituminous coal and lignite coal had better reactivity with CaFe2O4 than the bituminous coal. A ten-cycle test conducted with Wyodak coal/CaFe2O4 at 800 degrees C showed stable production of H-2 during oxidation with steam. A 25-cycle steam oxidation test conducted after reduction of CaFe2O4 with lignite coal also showed a very stable performance. Steam oxidation is sufficient for maintaining the cyclic reactions. A larger scale (2 kg batch) production of CaFe2O4 by wet granulationtumbling method was successful. Steam oxidation was demonstrated with the large-scale batch of CaFe2O4 after reduction with Wyodak coal. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.