主催: 日本エネルギー学会
共催: 化学工学会 エネルギー部会
後援: 経済産業省 九州経済産業局
会議名: 第40回石炭科学会議
回次: 40
開催地: 九州大学医学部 百年講堂
開催日: 2003/10/23 - 2003/10/24
p. 76-77
Production of hydrogen-rich clean gas was conducted by steam gasification of woody biomass using calcium as a CO_2 sorbent at different reaction temperatures (200-650℃), in order to examine the gasification mechanism. From the results obtained, initially (<500℃) hydrogen mainly derived from shift reactions of steam with CO obtained by thermal degradation of the biomass structure and that by reforming of water-soluble tar. Then (>500℃) decomposition of heavy tar was promoted, resulting in a large increase in product gas yield. During the experiment, CO_2 evolved was completely absorbed into calcium as CaCO_3. Moreover, water-gas shift reaction successfully proceeded, since almost no CO was detected.