14.鉄触媒を用いるバイオマス炭化物の水素ガス化 : 細胞組織膨潤及び脱灰前処理の効果

抄録

Iron-loaded oak bark chars were prepared at 500℃-carbonization after cell wall swelling and demineralization as the pretreatments, and their hydrogasification reactivities were measured in a thermobalance. For swelling the cell wall structure, raw bark was soaked in boiling water or extracted in water with supercritical carbon dioxide. Demineralization was carried out by washing with 0.1N-HCl. Either swelling was beneficial for improvement in the dispersity of iron metal particles on char, by which iron raised the catalytic activity in the hydrogasificasion. Demineralization followed by each swelling was more effective to enhance the gasification reactivity. This is because finer particles of metallic iron could be produced by diminished interaction with ash components.