Hydrogenation saturation of aromatic compounds (naphthalene) in coal tar

作者：Xia Liang Yan; Xia Zhi Xiang; Fang Meng Xiang^*; Tang Wei; Wang Qin Hui; Luo Zhong Yang

来源：Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science), 2015, 49(3).

DOI：10.3785/j.issn.1008-973X.2015.03.025

• Aromatic saturation
• Aromatics hydrogenation
• Fixed bed reactor
• Hydrogenation process
• Hydrogenation reactions
• Naphthalene hydrogenation
• Optimized process
• Reaction temperature

Naphthalene was chosen as the model compound of aromatics in coal tar to improve the aromatics hydrogenation process in coal tar hydrogenation. The influence of temperature, pressure, volume space velocity and hydrogen to oil volume ratio on conversion of naphthalene, accompany with the selectivity of tetralin and decalin, was investigated over MoNiWP/γ-Al2O3 catalyst in a fixed bed reactor. The effect of heteroatoms was studied by adding different mass fractions of S (dibenzothiophene), N (quinoline) and O (o-cresol), respectively. And the hydrogenation of multiple aromatic compounds was primarily investigated. The results reveal that: MoNiWP/γ-Al2O3 catalyst shows great activity on the hydrogenation of naphthalene. Reaction temperature and volume space velocity have more obvious effect on reaction. The optimized process conditions of hydrodearo-matization was at 320, 4 MPa, hydrogen to oil volume ratio of 600: 1 and volume space velocity of 2 h-1. Trace mass fraction of S and N hardly worked on naphthalene hydrogenation. When the mass fraction of S, N was over 0.15% and that of O was higher than 0.30%, the hydrogenation reaction, especially saturation of the second benzene ring of naphthalene, was inhabited. Hydrogenation saturation reactions of different kinds of aromatic compounds influence mutually. Therefore, two step hydrogenation of coal tar is recommended and removing the phenols in coal tar in advance is also important.

• 单位
  浙江大学