Recently, hydrogen is an attractive fuel as a secondary energy. In the future, the fuel consumption would be expanded from the viewpoint of contribution to the global warming protection. The hydrogen production from biomass feedstock is a promising candidate among hydrogen production. Especially, the production scheme through a steam-based gasification system would be more effective. Thus, in this paper, using the measurement index of exergy which can be evaluated on the availability of effective energy, the exergy analysis was carried out for our designed systems. As a result, the influence on syngas compensated in the combustor was found out. That is, it was found that the exergy loss on a proposed system in which much heat loss in the reactors was prevented decreases in comparison to a conventional system.
