主催: 日本エネルギー学会 石炭科学部会, 日本エネルギー学会 コークス工学研究部会
共催: 日本学術振興会 石炭・炭素資源利用技術第148委員会, 化学工学会 エネルギー部会, 日本エネルギー学会 重質油部会
後援: 東北大学
会議名: 第51回石炭科学会議
回次: 51
開催地: 東北大学工学部 青葉記念会館
開催日: 2014/10/22 - 2014/10/23
Physical and chemical properties of iron oxide-carbon composites prepared from tar-impregnated limonite ores have been studied in detail. When as-received limonite is heated up to 500℃, the pore size distribution for the resulting sample shows a single peak at the pore diameter of about 2 nm, and total pore volume and specific surface area increase from the original 0.15 cm^3/g and 80 m^2/g to 0.25 cm^3/g and 110 m^2/g, respectively. With the composite produced, on the other hand, the 2 nm-peak described above disappears almost completely, and the volume and area become as low as <0.01 cm^3/g and 1 m^2/g, respectively. The evolution of CO, CO_2 or H_2O from composite samples during heat treatment starts at about 500℃, and the rate profile of each O-containing gas observed exhibits the main peak around 800℃ in every case. The rates of reduction of the composites are much larger than that for the physical mixture of the limonite preheated up to 500℃ and cake.