Morio Suzuki

Characteristic diagram for coal-derived liquid.

The aromatic carbon fraction, i. e. arornaticity fa obtaind from 13C NMR spectrum and atomic H/C ratio obtaind from elemental analyses are important parameters to characterize the coal-derived materials. The characteristic diagram, the correlation between the fa and atomic H/C ratio for hydrocarbons, is shown to be useful to characterize the coal liquefaction products and to estimate the reaction path-way relating with the coal liquefaction.In this paper, we propose a relation between the amount of consumed hydrogen, AH2, for the ring hydrogenation reaction, and the variation of fa. The correlation is given in the following equation.ΔH2=37× (Δfa)ΔH2 (mol-H2/kg-compound)where Ma is the differences of Δfa before and after hydrogenation reaction.This correlation can be applied the hydrogenation reaction products of anthracene oil.

Hydrodenitrogenation of Taching Atmospheric Residue

Hydrodenitrogenation of Taching atmospheric residue was performed in a fixed bed co-current up-flow reactor packed with a Ni-Mo/Al2O3 catalyst under 50-200kg/cm2 and 360-440°C, and the characteristics of the residue hydrodenitrogenation and effects of sulfur on the reaction were investigated. Nitrogen was found to be considerably poorer than sulfur in reactivity with hydrogen. One of the reasons could be that nitrogens existence was more localized than sulfur in the heavier fractions. Hydrodenitrogenation of Taching residue was promoted markedly by adding a sulfur compound to the feedstock. This sulfur is assumed to be hydrogenated to hydrogen sulfide that activated the catalyst by keeping it in the sulfided state, and 2% of sulfur in the feedstock seemed adequate. Hydrodenitrogenation was found to be closely related to hydrocracking. The nitrogen removal was linearly correlated with the hydrocracking ratio represented by the decrease in the molecular weight within the range of nitrogen removal above 30%.

Hydrodesulfurization of Heavy-Oil in the Fixed-Bed Cocurrent Up-Flow Reactor

圧力 50～200kg/cm2, 温度 400～460℃ の反応条件下で, コバルト-モリブデン-アルミナ系の浸漬触媒を用いて, カフジ常圧蒸留残油の水素化脱硫を, 静止床上向並流型反応器により行なった。脱硫反応速度は, イオウ濃度の2次に比例するものとして整理でき, 下向並流型の接触方式と同様, 押し出し流れを仮定して, 取扱うことが可能である。反応速度はまた, 全圧に比例し, 水素対油比には無関係であった。これらの結果も下向並流型の場合と同様であり, 接触方式の違いによる本質的な差異はみとめられなかった。活性化エネルギーは 440℃ 以下の温度範囲で, 約35kcal/molであった。LHSV=1 において, 400℃, 100kg/cm2 以上の条件で, 90% 以上の脱硫率が得られた。また, 90%以下の脱硫率の範囲で 90%以上の脱硫油の収率が得られた。脱硫油および脱硫重油の収率の全圧による変化は, 温度による変化に比較してかなり小さいことがわかった。アスファルテソは反応温度440℃ 以上ではほとんど消減した。また, 脱硫率の増加にともなって, 水素の理論消費量 1mol のイオウを脱硫するのに 2mol の水素を必要とすると仮定した時の水素消費量)に対する実際の消費量の割合が増加した。この傾向は脱硫率 80%以上で顕著であった。