Kaoru Onoe

Kinetic analysis of molecular weight distribution in coal liquefaction - Lowering of molecular weight of coal-derived liquid.

従来より, 石炭液化反応の速度論的解析は, 溶剤抽出や蒸留分別に基づくランピングモデルにより行われてきた.しかし, これらのモデルは, 反応機構や生成物を単純化して取り扱う断続的モデルであり, 生成物分布。反応機構および操作条件との関係を詳細かつ定量的に把握するためには, 液化反応における連続的取り扱いが必要である.そこで。本研究では, 液化反応で得られた一次液化油の分子量分布をGPC法を用いて測定し, その経時変化を連続的低分子化モデルにより説明した.その結果, 分子量mが300以上の範囲では, 初期の分子量分布, 反応速度定数k, mに対する反応次数bが既知であれば, 任意の反応時間での分子量分布が推算可能であること, また, m=300付近を境にして低分子化速度の分子量に対する依存性が異なることを明らかにした.

Effect of temperature on particle size change of coal in coal liquefaction with donor solvent.

In the previous paper, it was demonstrated that the reaction could be divided into three regions, and the modified double shrinking core model, the double shrinking core model and the shrinking core model were applied to regions I, II and III respectively. However, the influence of different conditions on coal particle size change is not fully understood.In the present paper, the influence of reaction temperature on changes in residue weight, particle size and density was examined, using Taiheiyo coal screened to 16/20 mesh as the starting materials. It was found that the effect of reaction temperature on coal particle change is very great in region I. Moreover, by assuming initial particle size using the double shrinking core model, the relation between reaction temperature and particle size change was clarified.