Abstract: Optimization for hydrodenitrification process conditions of coal tar in a fixed-bed hydrogenation unit was investigated using single-factor extraction tests and response surface methodology. The optimized process conditions were found as：reaction temperature of 704.4 K，reaction pressure of 13.48 MPa，hydrogen to oil volume ratio of 1600∶1 and LHSV（liquid hourly space velocity）of 0.20 h－1，under which the nitrogen content of products was 90～100 μg/g. For the high nitrogen mass fraction in coal tar，the hydrodenitrification reaction must be carried out at high temperature，high pressure and low LHSV to get higher denitrification rate. These findings provided some valuable information for further researches in coal tar hydro-upgrading process.

摘要： 在小型固定床加氢装置上，研究煤焦油加氢脱氮工艺过程各参数对脱氮效果的影响。通过单因素考察和响应面分析法得到了加氢脱氮的优化工艺条件为：反应温度704.4 K，反应压力13.48 MPa，氢油体积比1600︰1，液体体积空速0.20 h－1，产品氮含量为90～100 μg/g。由于煤焦油的氮含量较高，要达到较好的加氢脱氮效果必须在高温、高压和低空速下进行。研究结果对煤焦油加氢改质工艺的深入研究提供了一定的理论基础和参考。