论文部分内容阅读
以孤岛渣油和辽河渣油为原料、以供氢剂 9,10 二氢蒽为化学探针 ,在反应温度 36 0℃～ 430℃和体系初压为室温时 4 0MPa氮气氛的热反应条件下 ,在微型高压釜内对渣油热转化机理随反应温度的变化进行了初步探讨。化学探针在渣油中的供氢反应遵循一级反应动力学模型 ;其中孤岛渣油反应体系中的供氢反应速率常数较辽河渣油中的大 ,并且其间的差别随温度升高而增大。虽然两种渣油反应体系中的氢转移反应积分活化能极为接近 ,但是微分活化能随温度升高而显著降低 ;这表明氢转移机理从较低温度时以分子间的反应为主转变为在较高温度时以自由基参与的反应为主。
Gudao residue and Liaohe residue as raw materials, hydrogen donors 9,10-dihydroanthracene as a chemical probe, the reaction temperature 36 0 ℃ ~ 430 ℃ and the initial system pressure at room temperature 4 0MPa nitrogen atmosphere thermal reaction conditions Under the micro-autoclave, the thermal conversion mechanism of residual oil with the reaction temperature was initially discussed. The hydrogen supply reaction of the chemical probe in the residual oil follows the first-order kinetic model. The constant rate of hydrogen supply reaction in the isolated island oil reaction system is larger than that in the Liaohe residue, and the difference between them increases with increasing temperature Big. Although the activation energy of hydrogen transfer reaction in two kinds of residuum reaction systems is very close, the differential activation energy decreases with the increase of temperature. This shows that the mechanism of hydrogen transfer shifts from the intermolecular reaction at lower temperature to At higher temperatures, free radicals participate in the reaction.