@article{oai:ir.kagoshima-u.ac.jp:00010586,
 author = {幡手, 泰雄 and HATATE, Yasuo and 田尻, 秀一 and TAJIRI, Shuichi and 泊, 康弘 and TOMARI, Yasuhiro and 碇, 醇 and IKARI, Atsushi and 羽野, 忠 and HANO, Tadashi},
 journal = {鹿児島大学工学部研究報告, The research reports of the Faculty of Engineering, Kagoshima University},
 month = {Nov},
 note = {For development of the analysis and design of a direct coal liquefaction process, the characteristics of flow, heat transfer and mass transfer in the preheater section, which plays an important role for coal dissolution, should be clarified. "Hot" experiments at high temperatures up to about 500°C and high pressures from 100 to 200 atm are desirable for this purpose. However, at the present time, no experimental information except for plant data is available due to extreme difficulty in carrying out the experiments under such critical conditions. In the present study, the mass transfer characteristics in gas-liquid-solids multi-phase flow-predominant in the coal liquefaction process were investigated using a "Cold" model, i.e., an air-water-fine glass beads system at the normal temperature and atmospheric pressure in place of a hydrogen-oil-coal particles system in the high temperatures and high pressures. The volumetric coefficients were measured under the conditions of gas velocity=50-800 cm/s, slurry velocity=20-100 cm/s and solid particles concentraion in slurry=0-30 wt% using a 1.5 cm i.d. horizontal tube. The following results were obtained: (1) Linear increases in the volumetric coefficient were observed with increasing gas and liquid velocities. (2) Smaller volumetric coefficients in the gas-liquid-solids multiphase were more obvious than those in the gas-liquid two-phase flow in most experimental conditions, except for a few conditions of gas velocites below 100 cm/s. (3) Increasing solids concentrations in slurry up to 30 wt% made considerable decreases in the volumetric coefficient for a slurry velocity of 50 cm/s, but almost no change in the volumetric coefficient for a slurry velocity of 100 cm/s.},
 pages = {129--135},
 title = {気液固系混相流における物質移動特性 : 石炭直接液化のコールドモデルとして},
 volume = {29},
 year = {1987}
}