The selective hydrogenation of heavy aromatics in coal tar was carried out in a fixed-bed reactor,and the effects of reaction temperature and pressure on the saturation degree of heavy aromatics and the selectivity of monocyclic aromatics were studied. By comparing the four catalysts prepared, the Ni-Mo-P system catalyst with higher selectivity for monocyclic aromatic hydrocarbons was selected. The results of hydrogenation reaction of coal tar distillate shown that the saturation degree of polycyclic aromatic hydrocarbons ( PAHs) was 84. 2％ and the selectivity of monocyclic aromatic hydrocarbons was 60. 4％ when the temperature was 360 ℃, the pressure was 6 MPa, the liquid hourly space velocity (LHSV) was 0. 5 h-1 and the hydrogen-oil ratio was 800:1. Compared with the distillate oil,the heavy aromatics in the dephenolized oil of coal tar obtained higher conversion and selectivity of monocyclic aromatics after selective hydrogenation.
关键词
精细化学工程/煤焦油/重质芳烃/选择性加氢/单环芳烃选择性
Key words
fine chemical engineering/coal tar/heavy aromatics/selective hydrogenation/selectivity of monocyclic aromatic hydrocarbons
维普
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