HDS reaction order (n, from best fit of Eq. (1)) for various tested pristine and LN middle distillates. Activation energy (Ea) as determined from corresponding Arrhenius plots also included. Steady-state up-flow fixed-bed reactor, T = 330–350 °C, P = 56 kg cm−2 (5.77 MPa), LHSV = 1.25–2.5 h−1, H2/oil = 2500 p3 bbl−1 (445 m3 m−3).
|Ea (kJ mol−1)||94.58||30.45||ND||ND||105.6||28.36|