增加润滑油馏分芳烃含量的脱氢反应研究

PRELIMINARY STUDY ON DEHYDROGENATION OF LUBE FRACTION TO FORM AROMATIC HYDROCARBONS

考察了润滑油馏分在一种负载型贵金属催化剂作用下,在不同反应温度和反应压力下,生成芳烃的变化趋势。结果表明:润滑油馏分的脱氢反应,在6MPa的反应压力下,随着反应温度的变化,存在热力学平衡点,超过此温度点,有利于芳烃生成;氢气分压对润滑油脱氢反应影响很大,在360℃的反应温度下,随着反应压力的变化,存在热力学平衡点,反应压力低于10MPa,有利于芳烃生成。在高温低压下反应后,大量的褐色物质吸附在催化剂上,清洗困难,不易脱附。

The aromatics formation trend of lube fraction under various reaction temperatures and hydrogen partial pressures was investigated over a supported noble metal catalyst.Test results show that with a reaction pressure of 6 MPa,the dehydrogenation reaction rate of lube fraction changes with the reaction temperature,and there is a thermodynamic equilibrium point,when the temperature exceeds this point,the reactions of aromatics formation are favored;the same to reaction pressure,under a reaction temperature of 360℃,when the reaction pressure is below the thermodynamic equilibrium point of 10 MPa,the reaction rates of aromatics formation speed up.Under high temperature and low pressure,some brown substances are adsorbed on the catalyst,and it is not easy to be cleaned or to be desorbed.