O-17　熱分解・スチームタール改質・バイオチャー直接化学　ループプロセスを組み合わせることによるバイオマスからの電力と水素の併産

抄録

Nowadays, biomass is becoming an alternative energy source besides conventional fossil fuel. In this study, hybrid process consisting biomass pyrolysis, steam tar reforming, and biochar direct chemical looping was designed to produce power and hydrogen from biomass simultaneously. Biomass is pyrolyzed to produce tar and biochar at first, and then the produced tar is reformed into hydrogen rich syngas while the biochar is converted to high purity hydrogen and power simultaneously. Pressure swing adsorption (PSA) is used to separate the hydrogen from other gases in the syngas. The tail gas from PSA separation is burnt to provide heat required by steam tar reforming process. Heat circulation of hot gas is used as heat carrier for biomass pyrolysis process so the total system is operated auto-thermally. This small-scale system can produce about 100 kW of power and 11.8 kg/hr of hydrogen with purity of 99.5% by converting 172 kg/hr of woody biomass.