✍ Scribed by P.T Williams; H.M Chishti
No coin nor oath required. For personal study only.
Pyrolysis oil derived from oil shale was hydrotreated in a stirred reactor at 4008C for a hydrotreatment time of 12 h. The in¯uence of hydrogen pressure at 7, 9, 11 and 15 MPa and the role of catalyst type in the form of nickel±molybdenum and cobalt±molybdenum types was investigated in relation to the yield and composition of the products. The results showed that nitrogen and sulphur contents of the hydrotreated oils were signi®cantly decreased after hydrotreatment and were further decreased with increasing pressure of hydrogen. Correspondingly, detailed analysis of the oils showed that the aromatic nitrogen and sulphur containing compounds were decreased in concentration in the oils as the hydrogen pressure was increased. The comparison of catalyst types showed that there was little difference in the denitrogenation and desulphurisation ef®ciency of the two catalysts.
📜 SIMILAR VOLUMES
The results obtained are shown in Table 1. It can be seen that there is a significant variation in absolute spin concentration within the seam. The spin count rises as the coal becomes progressively more disturbed along the seam, with the highest count occurring within the outburst-prone area. All t
## Isotopic hydrogen exchange reactions catalysed by group VIII transi-