基于预加氢的煤焦油重质馏分油供氢性能研究

对煤焦油重质馏分油进行预加氢处理，利用红外光谱、核磁共振和元素分析等方法，从分子结构角度深入探讨煤焦油重质馏分油的理化性质和供氢性能的变化规律。结果表明，通过预加氢处理，煤焦油重质馏分油的芳碳率（fa）由加氢前的0.89下降到加氢后的0.80，芳环取代度（σ）由加氢前的0.12提高到0.20，供氢指数（PDQI）由3.21 mg/g提高到4.02 mg/g；预处理后的煤焦油重质馏分油在煤油共炼中的氢耗由4.03%下降到3.74%，转化率和油产率均得到提高，产物油中的沥青质含量明显下降，油品质量有明显改善。

STUDY ON HYDROGEN SUPPLY PERFORMANCE OF PRE-HYDROTREATED COAL TAR HEAVY OIL

The coal tar heavy oil was pre-hydrotreated and then characterized by means of infrared spectroscopy，nuclear magnetic resonance and elemental analysis. The physicochemical properties and the hydrogen supply ability of the pre-hydrotreated oil were investigated from the molecular structure point of view. The results showed that after the aromaticity of the hydrotreated heavy oil decreases from 0.89 of feed to 0.80, the degree of substitution of aromatic rings increases from 0.12 to 0.20 and the hydrogen supply index （PDQI） increases from 3.21 to 4.02. The hydrogen consumption of coal tar heavy oil in coal-oil co-processing from 4.03% to 3.74%，the conversion rate and the oil yield are improved，the asphaltene content in the product decreases significantly, the oil quality is greatly improved .