煤直接液化柴油深度加氢脱芳烃反应动力学  

Kinetics of Deep Hydrodearomatization of Diesel Oil from Direct Coal Liquefaction

作　　者：单贤根[1] Shan Xiangen(China Shenhua Coal to Liquid and Chemical Shanghai Research Institute, National Engineering Laboratory of Direct Coal Liquefaction, Shanghai 201108, China)

机构地区：[1]中国神华煤制油化工有限公司上海研究院,煤炭直接液化国家重点工程实验室

出　　处：《化学反应工程与工艺》2018年第5期454-459,共6页Chemical Reaction Engineering and Technology

基　　金：国家重点研发计划项目（2016YFB0600303）;神华集团科技创新项目（SHJT-17-16）

摘　　要：为了研究煤直接液化柴油加氢脱芳烃反应规律,采用贵金属加氢催化剂在30 mL连续加氢实验装置上对煤直接液化柴油进行了深度加氢实验,考察了不同反应压力6~12 MPa,反应温度80~240℃,体积空速0.4~1.2 h-1条件下煤直接液化柴油芳烃饱和行为。研究表明,在合适的加氢条件下产品油中芳烃质量分数可以降低到0.01%以下。将外扩散传质过程与芳烃加氢反应过程相结合,通过动力学方程推导建立了直接液化柴油芳烃加氢反应动力学模型方程。模型预测结果表明,随着流体空塔流速提高,外扩散有效因子先增大然后趋于1,芳烃转化率呈先增大后趋于不变;反应温度越高,消除外扩散影响所需的流体空塔流速越大。可通过模型预测得到,在消除外扩散影响下,保证直接液化柴油馏分油加氢后芳烃含量低于0.01%所需的反应温度和体积空速。To study the hydrodearomatics reaction law of diesel oil from direct coal liquefaction, the deep hydrogenation of diesel oil was carried out on a 30 mL continuous hydrogenation experimental apparatus using Pd-Pt hydrogenation catalyst at the operating conditions of pressure 6-12 MPa, temperature 80-240 ℃ and liquid space velocity 0.4-1.2 h……-1. The results showed that the mass fraction of aromatics in the product oil was reduced to less than 0.01 % under certain hydrogenation conditions. Kinetic equation for hydrodearomatization of diesel oil from direct coal liquefaction was established by combining with external diffusion mass transfer process and the hydrodearomatics reaction process. It is predicted that the effective diffusion coefficient increases firstly and then stabliize to 1, while the aromatic conversion increases and then becomes constant, as the space velocity of the fluid increases. And the higher the reaction temperature is, the greater space velocity of the fluid is required to eliminate the effects of external diffusion. The required reaction temperature and volume space velocity in the hydrogenation of direct liquefied diesel oil could be calculated by kinetics to ensure being less than 0.01% of aromatic hydrocarbon content in the product oil.

关 键 词：煤直接液化柴油 加氢 柴油脱芳烃 反应动力学 

分 类 号：O643.38[理学—物理化学]