Research on the Production of Aromatic Hydrocarbon via Hydroreforming a Light Fraction in Direct Coal Liquefaction Oil
2015
Huang, Peng | Zhang, Xiao-Jing | Mao, Xue-Feng
Direct coal liquefaction (DCL) oil is known for the production of aromatic hydrocarbon because of the large amount of cyclic compounds with a high aromatic content. In this work, naphtha from the DCL oil was used as raw material and the hydroreforming experiments were carried out in a small continuous fixed-bed reactor for the production of aromatics. The results show that the n-alkane isomerization reaction occurred and naphthenics were converted to aromatics via dehydrogenation and aromatization during the process of hydroreforming. The yield of C₁–C₄ hydrocarbon gas was 6.03%, and the yield of hydrogen was 3.6%. The aromatic content reached 83.2% with 61.3% of C₆–C₈ after reforming, which is a better raw material to extract benzene, toluene, ethylbenzene, and xylenes. It is found that the naphtha distillation range also affected the composition and yield of aromatic hydrocarbons and the appropriate temperature range was 60–160 °C. According to the experimental results, the technical route to produce aromatic hydrocarbon from DCL oil naphtha was also proposed.
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