Abstract: The aromatics formation trend of lube fraction under various reaction temperatures and hydrogen partial pressures was investigated over a supported noble metal catalyst. Test results show that with a reaction pressure of 6 MPa, the dehydrogenation reaction rate of lube fraction changes with the reaction temperature, and there is a thermodynamic equilibrium point, when the temperature exceeds this point, the reactions of aromatics formation are favored; the same to reaction pressure, under a reaction temperature of 360℃, when the reaction pressure is below the thermodynamic equilibrium point of 10 MPa, the reaction rates of aromatics formation speed up. Under high temperature and low pressure, some brown substances are adsorbed on the catalyst, and it is not easy to be cleaned or to be desorbed.

Key words: dehydrogenation , noble metal, catalyst, Lubricating oil , aromatics